HAProxy known bugs for version v2.6.11 (maintenance branch 2.6) :  258 

This version (2.6.11) is a release belonging to maintenance branch 2.6 whose latest version is 2.6.16. If your version is not the last one in the maintenance branch, you are missing fixes for known bugs, and by not updating you are needlessly taking the responsibility for the risk of unexpected service outages and exposing your web site to possible security issues.

The HAProxy development team takes a great care of maintaining stable versions so that all users can apply bug fixes without having to take the risk of upgrading to a new branch. In turn users are expected to apply the fixes when the development team estimates that they were worth being backported to stable branches.

Quick links

Other versions in the same branch

This branch contains the following releases :

DateVersionComment
2023-12-132.6.16 ⇐ last
2023-08-092.6.15 
2023-06-092.6.14 
2023-05-022.6.13 
2023-03-282.6.12 
2023-03-172.6.11 ⇐ yours
2023-03-102.6.10 
2023-02-142.6.9 
2023-01-242.6.8 
2022-12-022.6.7 
2022-09-222.6.6 
2022-09-032.6.5 
2022-08-222.6.4 
2022-08-192.6.3 
2022-07-222.6.2 
2022-06-212.6.1 
2022-05-312.6.0 

Known bugs affecting this version, and already fixed in the maintenance branch

These fixes have already been queued for a more recent 2.6 version. Some of them might have already been released in a more recent version than yours, and other ones might still be pending in the maintenance branch for a future release. The list may be empty if you're already on the latest version and no new fix was backported.

Bugs are almost always tagged with a severity (some people forget the severity tag when the bug is minor). The following severities are used :

Total known bugs in this version by category :

TotalCRITICALMAJORMEDIUMMINOR
258 0 7 77 174

Click on the subjects below to get the full description of the bug :

Merge dateSubject - Severity (minor, medium, major, critical)
2024-01-19BUG/MINOR: mux-quic: do not prevent non-STREAM sending on flow control
2024-01-19BUG/MEDIUM: h3: fix regression which completely prevents any send
2024-01-17BUG/MEDIUM: spoe: Never create new spoe applet if there is no server up
2024-01-17BUG/MEDIUM: stconn: Forward shutdown on write timeout only if it is forwardable
2024-01-17BUG/MEDIUM: h3: fix incorrect snd_buf return value
2024-01-17BUG/MINOR: h3: close connection on sending alloc errors
2024-01-17BUG/MINOR: h3: properly handle alloc failure on finalize
2024-01-17BUG/MINOR: h3: close connection on header list too big
2024-01-17BUG/MEDIUM: stats: unhandled switching rules with TCP frontend
2024-01-17BUG/MINOR: resolvers: default resolvers fails when network not configured
2024-01-17BUG/MEDIUM: mux-h2: Report too large HEADERS frame only when rxbuf is empty
2024-01-17BUG/MINOR: mworker/cli: fix set severity-output support
2024-01-17BUG/MEDIUM: proxy: always initialize the default settings after init
2024-01-17BUG/MEDIUM: mworker: set the master variable earlier
2024-01-17BUG/MEDIUM: connection: report connection errors even when no mux is installed
2023-12-13BUG/MINOR: quic: Possible leak of TX packets under heavy load
2023-12-13BUG/MEDIUM: quic: Avoid some crashes upon TX packet allocation failures
2023-12-13BUG/MINOR: quic: Possible memory leak from TX packets
2023-12-13BUG/MEDIUM: pattern: don't trim pools under lock in pat_ref_purge_range()
2023-12-13BUG/MINOR: cache: Remove incomplete entries from the cache when stream is closed
2023-12-13BUG/MINOR: sample: Make the `word` converter compatible with `-m found`
2023-12-13BUG/MINOR: cfgparse-listen: fix warning being reported as an alert
2023-12-13BUG/MINOR: config: Stopped parsing upon unmatched environment variables
2023-12-13BUG/MINOR: quic_tp: fix preferred_address decoding
2023-12-13BUG/MINOR: h3: always reject PUSH_PROMISE
2023-12-13BUG/MINOR: quic: fix CONNECTION_CLOSE_APP encoding
2023-12-13BUG/MINOR: server: do not leak default-server in defaults sections
2023-12-13BUG/MEDIUM: quic: Possible crash for connections to be killed
2023-12-13BUG/MINOR: sock: mark abns sockets as non-suspendable and always unbind them
2023-12-13BUG/MINOR: startup: set GTUNE_SOCKET_TRANSFER correctly
2023-12-13BUG/MINOR: proxy/stktable: missing frees on proxy cleanup
2023-12-13BUG/MINOR: stream/cli: report correct stream age in "show sess"
2023-12-13BUG/MEDIUM: mux-fcgi: fail earlier on malloc in takeover()
2023-12-13BUG/MEDIUM: mux-h1: fail earlier on malloc in takeover()
2023-12-13BUG/MEDIUM: mux-h2: fail earlier on malloc in takeover()
2023-12-13BUG/MEDIUM: quic: fix sslconns on quic_conn alloc failure
2023-12-13BUG/MEDIUM: quic: fix actconn on quic_conn alloc failure
2023-12-08BUG/MINOR: sink: don't learn srv port from srv addr
2023-12-08BUG/MEDIUM: quic: Possible crashes when sending too short Initial packets
2023-12-08BUG/MEDIUM: quic: Avoid trying to send ACK frames from an empty ack ranges tree
2023-12-08BUG/MINOR: quic: idle timer task requeued in the past
2023-12-08BUG/MINOR: ssl: use a thread-safe sslconns increment
2023-12-08BUG/MINOR: mux-quic: fix early close if unset client timeout
2023-12-08BUG/MINOR: quic: do not consider idle timeout on CLOSING state
2023-11-20BUG/MINOR: stconn: Use HTX-aware channel's functions to get info on buffer
2023-11-20BUG/MINOR: stconn: Fix streamer detection for HTX streams
2023-11-20BUG/MEDIUM: stream: Don't call mux .ctl() callback if not implemented
2023-11-20BUG/MINOR: http-client: Don't forget to commit changes on HTX message
2023-11-20BUG/MEDIUM: stream: Properly handle abortonclose when set on backend only
2023-11-20BUG/MINOR: stconn: Handle abortonclose if backend connection was already set up
2023-11-20BUG/MEDIUM: applet: Remove appctx from buffer wait list on release
2023-11-20BUG/MEDIUM: pool: fix releasable pool calculation when overloaded
2023-11-20BUG/MINOR: mux-h1: Properly handle http-request and http-keep-alive timeouts
2023-11-20BUG/MINOR: stick-table/cli: Check for invalid ipv4 key
2023-11-20BUG/MINOR: cfgparse/stktable: fix error message on stktable_init() failure
2023-11-20BUG/MINOR: stktable: missing free in parse_stick_table()
2023-11-20BUG/MINOR: tcpcheck: Report hexstring instead of binary one on check failure
2023-11-20BUG/MEDIUM: ssl: segfault when cipher is NULL
2023-11-20BUG/MINOR: ssl: suboptimal certificate selection with TLSv1.3 and dual ECDSA/RSA
2023-11-20BUG/MEDIUM: server: "proto" not working for dynamic servers
2023-11-20BUG/MINOR: ssl: load correctly @system-ca when ca-base is define
2023-10-27BUG/MINOR: mux-h2: update tracked counters with req cnt/req err
2023-10-27BUG/MINOR: mux-h2: commit the current stream ID even on reject
2023-10-27BUG/MEDIUM: peers: Fix synchro for huge number of tables
2023-10-27BUG/MEDIUM: peers: Be sure to always refresh recconnect timer in sync task
2023-10-27BUG/MINOR: mux-h2: fix http-request and http-keep-alive timeouts again
2023-10-27BUG/MEDIUM: mux-h2: Don't report an error on shutr if a shutw is pending
2023-10-27BUG/MINOR: mux-h2: make up other blocked streams upon removal from list
2023-10-27BUG/MINOR: mux-quic: fix free on qcs-new fail alloc
2023-10-27BUG/MINOR: h3: strengthen host/authority header parsing
2023-10-27BUG/MINOR: mux-quic: support initial 0 max-stream-data
2023-10-27BUG/MINOR: quic: reject packet with no frame
2023-10-27BUG/MINOR: quic: Avoid crashing with unsupported cryptographic algos
2023-10-27BUG/MINOR: hq-interop: simplify parser requirement
2023-10-27BUG/MEDIUM: h1: Ignore C-L value in the H1 parser if T-E is also set
2023-10-27BUG/MINOR: mux-h1: Ignore C-L when sending H1 messages if T-E is also set
2023-10-27BUG/MEDIUM: hlua: Initialize appctx used by a lua socket on connect only
2023-10-17BUG/MEDIUM: quic_conn: let the scheduler kill the task when needed
2023-10-06BUG/MEDIUM: actions: always apply a longest match on prefix lookup
2023-10-04BUILD: bug: make BUG_ON() void to avoid a rare warning
2023-10-04BUG/MEDIUM: server/cli: don't delete a dynamic server that has streams
2023-10-04BUG/MINOR: server: add missing free for server->rdr_pfx
2023-10-04BUG/MAJOR: mux-h2: Report a protocol error for any DATA frame before headers
2023-10-04BUG/MINOR: freq_ctr: fix possible negative rate with the scaled API
2023-10-04BUG/MINOR: promex: fix backend_agg_check_status
2023-10-04BUG/MEDIUM: mux-fcgi: Don't swap trash and dbuf when handling STDERR records
2023-10-04BUG/MINOR: hlua/init: coroutine may not resume itself
2023-10-04BUG/MEDIUM: hlua: don't pass stale nargs argument to lua_resume()
2023-10-04Revert "BUG/MEDIUM: quic: missing check of dcid for init pkt including a token"
2023-10-04BUG/MEDIUM: hlua: streams don't support mixing lua-load with lua-load-per-thread
2023-10-04BUG/MINOR: quic: Wrong cluster secret initialization
2023-10-04BUG/MINOR: quic: Leak of frames to send.
2023-09-07BUG/MINOR: quic: Wrong RTT computation (srtt and rrt_var)
2023-09-07BUG/MINOR: hlua/action: incorrect message on E_YIELD error
2023-09-07BUG/MEDIUM: stconn/stream: Forward shutdown on write timeout
2023-09-07BUG/MINOR: quic: Wrong RTT adjusments
2023-09-07BUG/MEDIUM: h1-htx: Ensure chunked parsing with full output buffer
2023-09-07BUG/MAJOR: quic: Really ignore malformed ACK frames.
2023-09-07BUG/MINOR: quic: Possible skipped RTT sampling
2023-09-07BUG/MEDIUM: stconn: Don't block sends if there is a pending shutdown
2023-09-07BUG/MEDIUM: stconn: Wake applets on sending path if there is a pending shutdown
2023-09-07BUG/MINOR: ssl/cli: can't find ".crt" files when replacing a certificate
2023-09-07BUG/MINOR: ssl_sock: fix possible memory leak on OOM
2023-09-07BUG/MINOR: hlua_fcn: potentially unsafe stktable_data_ptr usage
2023-09-07BUG/MINOR: stktable: allow sc-set-gpt(0) from tcp-request connection
2023-09-07BUG/MINOR: hlua: fix invalid use of lua_pop on error paths
2023-08-09BUG/MINOR: http: skip leading zeroes in content-length values
2023-08-09BUG/MINOR: h3: reject more chars from the :path pseudo header
2023-08-09BUG/MINOR: h2: reject more chars from the :path pseudo header
2023-08-09BUG/MINOR: h1: do not accept '#' as part of the URI component
2023-08-09BUG/MAJOR: http: reject any empty content-length header value
2023-08-09BUG/MAJOR: h3: reject header values containing invalid chars
2023-08-09BUG/MAJOR: http-ana: Get a fresh trash buffer for each header value replacement
2023-08-09BUG/MEDIUM: h3: Be sure to handle fin bit on the last DATA frame
2023-08-09BUG/MINOR: chunk: fix chunk_appendf() to not write a zero if buffer is full
2023-08-09BUG/MEDIUM: h3: Properly report a C-L header was found to the HTX start-line
2023-07-21BUG/MEDIUM: listener: Acquire proxy's lock in relax_listener() if necessary
2023-07-21BUG/MINOR: quic: Missing parentheses around PTO probe variable.
2023-07-21BUG/MINOR: h1-htx: Return the right reason for 302 FCGI responses
2023-07-21BUG/MINOR: hlua: add check for lua_newstate
2023-07-21BUG/MINOR: http: Return the right reason for 302
2023-07-21BUG/MINOR: sample: Fix wrong overflow detection in add/sub conveters
2023-07-21BUG/MINOR: hlua: hlua_yieldk ctx argument should support pointers
2023-07-21BUG/MEDIUM: quic: timestamp shared in token was using internal time clock
2023-07-21BUG/MEDIUM: quic: missing check of dcid for init pkt including a token
2023-07-21BUG/MINOR: quic: retry token remove one useless intermediate expand
2023-07-21BUG/MEDIUM: quic: token IV was not computed using a strong secret
2023-07-21BUG/MINOR: config: Remove final '\n' in error messages
2023-07-21BUG/MINOR: sink/log: properly deinit srv in sink_new_from_logsrv()
2023-07-21BUG/MINOR: sink: fix errors handling in cfg_post_parse_ring()
2023-07-21BUG/MINOR: sink: invalid sft free in sink_deinit()
2023-07-21BUG/MINOR: log: free errmsg on error in cfg_parse_log_forward()
2023-07-21BUG/MINOR: log: fix multiple error paths in cfg_parse_log_forward()
2023-07-21BUG/MINOR: log: fix missing name error message in cfg_parse_log_forward()
2023-07-21BUG/MEDIUM: log: improper use of logsrv->maxlen for buffer targets
2023-07-21BUG/MINOR: log: LF upsets maxlen for UDP targets
2023-07-21BUG/MINOR: ring: maxlen warning reported as alert
2023-07-21BUG/MINOR: ring: size warning incorrectly reported as fatal error
2023-07-21BUG/MINOR: sink: missing sft free in sink_deinit()
2023-07-21BUG/MEDIUM: sink: invalid server list in sink_new_from_logsrv()
2023-07-21BUG/MINOR: cache: A 'max-age=0' cache-control directive can be overriden by a s-maxage
2023-07-21BUG/MINOR: tcp_sample: bc_{dst,src} return IP not INT
2023-07-21BUG/MINOR: quic: Wrong endianess for version field in Retry token
2023-07-21BUG/MINOR: quic: Wrong Retry paquet version field endianess
2023-07-21BUG/MINOR: quic: Missing random bits in Retry packet header
2023-07-21BUG/MINOR: config: fix stick table duplicate name check
2023-07-21BUG/MEDIUM: quic: error checking buffer large enought to receive the retry tag
2023-07-21BUG/MINOR: mux-h2: refresh the idle_timer when the mux is empty
2023-07-21BUG/MEDIUM: mux-h2: make sure control frames do not refresh the idle timeout
2023-06-22BUG/MINOR: mworker: leak of a socketpair during startup failure
2023-06-22BUG/MINOR: quic: ticks comparison without ticks API use
2023-06-22BUG/MEDIUM: mworker: increase maxsock with each new worker
2023-06-22BUG/MINOR: quic: Missing initialization (packet number space probing)
2023-06-22BUG/MINOR: namespace: missing free in netns_sig_stop()
2023-06-22BUG/MINOR: server: inherit from netns in srv_settings_cpy()
2023-06-22BUG/MINOR: quic: Wrong encryption level flags checking
2023-06-08BUG/MINOR: proxy: add missing interface bind free in free_proxy
2023-06-08BUG/MINOR: cfgparse-tcp: leak when re-declaring interface from bind line
2023-06-06BUG/MINOR: quic: Possible crash when SSL session init fails
2023-06-06BUG/MINOR: spoe: Only skip sending new frame after a receive attempt
2023-06-05BUG/MINOR: quic: Missing Retry token length on receipt
2023-06-05BUG/MINOR: quic: Wrong token length check (quic_generate_retry_token())
2023-06-05BUG/MEDIUM: mux-quic: fix EOI for request without payload
2023-06-05BUG/MINOR: mux-quic: handle properly Tx buf exhaustion
2023-06-05BUG/MINOR: mux-quic: differentiate failure on qc_stream_desc alloc
2023-06-05BUG/MINOR: quic: do not alloc buf count on alloc failure
2023-06-05BUG/MINOR: mux-quic: handle properly recv ncbuf alloc failure
2023-06-05BUG/MINOR: mux-quic: properly handle buf alloc failure
2023-05-26BUG/MINOR: hlua: unsafe hlua_lua2smp() usage
2023-05-26BUG/MINOR: tcp-rules: Don't shortened the inspect-delay when EOI is set
2023-05-17BUG/MINOR: clock: fix the boot time measurement method for 2.6 and older
2023-05-17BUG/MINOR: checks: postpone the startup of health checks by the boot time
2023-05-17BUG/MINOR: log: fix memory error handling in parse_logsrv()
2023-05-17BUG/MINOR: errors: handle malloc failure in usermsgs_put()
2023-05-11BUG/MINOR: http_rules: fix errors paths in http_parse_redirect_rule()
2023-05-11BUG/MINOR: proxy: missing free in free_proxy for redirect rules
2023-05-11BUG/MEDIUM: mux-fcgi: Don't request more room if mux is waiting for more data
2023-05-11BUG/MINOR: quic: Buggy acknowlegments of acknowlegments function
2023-05-11BUG/MEDIUM: filters: Don't deinit filters for disabled proxies during startup
2023-05-11BUG/MINOR: quic: Possible crash when dumping version information
2023-05-11BUG/MINOR: quic: Wrong key update cipher context initialization for encryption
2023-05-11BUG/MINOR: debug: do not emit empty lines in thread dumps
2023-05-11BUG/MINOR: mux-quic: prevent quic_conn error code to be overwritten
2023-05-11DEV: haring: automatically disable DEBUG_STRICT
2023-05-11BUG/MINOR: resolvers: Use sc_need_room() to wait more room when dumping stats
2023-05-11BUG/MEDIUM: spoe: Don't start new applet if there are enough idle ones
2023-05-10BUG/MINOR: fd: always remove late updates when freeing fd_updt[]
2023-04-28BUG/MINOR: quic: prevent buggy memcpy for empty STREAM
2023-04-28BUG/MINOR: quic: Useless probing retransmission in draining or killing state
2023-04-28BUG/MINOR: config: fix NUMA topology detection on FreeBSD
2023-04-28BUG/MINOR: server: don't use date when restoring last_change from state file
2023-04-28BUG/MINOR: server: don't miss server stats update on server state transitions
2023-04-28BUG/MINOR: server: don't miss proxy stats update on server state transitions
2023-04-28BUG/MINOR: server: incorrect report for tracking servers leaving drain
2023-04-21BUG/MEDIUM: Update read expiration date on synchronous send
2023-04-21BUG/MINOR: mux-quic: properly handle STREAM frame alloc failure
2023-04-21BUG/MEDIUM: quic: Code sanitization about acknowledgements requirements
2023-04-21BUG/MINOR: quic: Possible crashes in qc_idle_timer_task()
2023-04-21BUG/MEDIUM: proxy/sktable: prevent watchdog trigger on soft-stop
2023-04-21BUG/MEDIUM: hlua: prevent deadlocks with main lua lock
2023-04-21BUG/MINOR: hlua: prevent function and table reference leaks on errors
2023-04-21BUG/MINOR: hlua: fix reference leak in hlua_post_init_state()
2023-04-21BUG/MINOR: hlua: fix reference leak in core.register_task()
2023-04-21BUG/MEDIUM: listener/proxy: fix listeners notify for proxy resume
2023-04-21BUG/MEDIUM: resume from LI_ASSIGNED in default_resume_listener()
2023-04-21BUG/MINOR: listener: fix resume_listener() resume return value handling
2023-04-21BUG/MEDIUM: listener: fix pause_listener() suspend return value handling
2023-04-21BUG/MINOR: quic: Wrong Retry token generation timestamp computing
2023-04-21BUG/MINOR: quic: Unchecked buffer length when building the token
2023-04-21BUG/MINOR: quic: Stop removing ACK ranges when building packets
2023-04-21BUG/MINOR: cfgparse: make sure to include openssl-compat
2023-04-21BUG/MINOR: quic: transform qc_set_timer() as a reentrant function
2023-04-21BUG/MINOR: task: allow to use tasklet_wakeup_after with tid -1
2023-04-21BUG/MEDIUM: log: Properly handle client aborts in syslog applet
2023-04-21BUG/MINOR: stream: Fix test on SE_FL_ERROR on the wrong entity
2023-04-21BUG/MINOR: quic: Wrong Application encryption level selection when probing
2023-04-21BUG/MINOR: quic: SIGFPE in quic_cubic_update()
2023-04-21BUG/MINOR: quic: Possible wrapped values used as ACK tree purging limit.
2023-04-21BUG/MINOR: quic: Ignored less than 1ms RTTs
2023-04-21BUG/MEDIUM: fd: don't wait for tmask to stabilize if we're not in it.
2023-04-21BUG/MINOR: stick_table: alert when type len has incorrect characters
2023-04-21BUG/MINOR: quic: Wrong packet number space probing before confirmed handshake
2023-04-21BUG/MEDIUM: resolvers: Force the connect timeout for DNS resolutions
2023-04-21BUG/MINOR: resolvers: Wakeup DNS idle task on stopping
2023-04-21BUG/MEDIUM: dns: Kill idle DNS sessions during stopping stage
2023-04-21BUG/MINOR: http-ana: Don't switch message to DATA when waiting for payload
2023-04-21BUG/MINOR: hlua: enforce proper running context for register_x functions
2023-04-21BUG/MINOR: log: free log forward proxies on deinit()
2023-04-21BUG/MINOR: sink: free forward_px on deinit()
2023-04-21BUG/MINOR: stats: properly handle server stats dumping resumption
2023-04-21BUG/MINOR: server/del: fix srv->next pointer consistency
2023-04-21BUG/MEDIUM: dns: Properly handle error when a response consumed
2023-04-21BUG/MEDIUM: channel: Improve reports for shut in co_getblk()
2023-04-21BUG/MINOR: quic: Possible wrong PTO computing
2023-04-20BUG/MINOR: quic: Remove useless BUG_ON() in newreno and cubic algo implementation
2023-04-20BUG/MAJOR: quic: Congestion algorithms states shared between the connection
2023-04-20BUG/MINOR: quic: Remaining useless statements in cubic slow start callback
2023-04-20BUG/MINOR: quic: Cubic congestion control window may wrap
2023-04-20BUG/MINOR: quic: Wrong rtt variance computing
2023-04-20BUG/MINOR: quic: Missing max_idle_timeout initialization for the connection
2023-04-20BUG/MINOR: quic: Wrong use of now_ms timestamps (newreno algo)
2023-04-20BUG/MINOR: quic: Wrong use of now_ms timestamps (cubic algo)
2023-04-20BUG/MINOR: backend: make be_usable_srv() consistent when stopping
2023-04-14Revert "BUG/MEDIUM: stconn: Don't rearm the read expiration date if EOI was reached"
2023-04-14BUG/MINOR: ssl: ssl-(min|max)-ver parameter not duplicated for bundles in crt-list
2023-03-28BUG/MINOR: quic: Missing STREAM frame type updated
2023-03-28BUG/MINOR: applet/new: fix sedesc freeing logic
2023-03-28BUG/MEDIUM: mux-h1: Wakeup H1C on shutw if there is no I/O subscription
2023-03-28BUG/MEDIUM: stats: Consume the request except when parsing the POST payload
2023-03-28BUG/MINOR: mux-quic: prevent CC status to be erased by shutdown
2023-03-28BUG/MINOR: h3: properly handle incomplete remote uni stream type
2023-03-28BUG/MEDIUM: mux-quic: release data from conn flow-control on qcs reset
2023-03-28BUG/MINOR: trace: fix hardcoded level for TRACE_PRINTF
2023-03-28BUG/MINOR: quic: wake up MUX on probing only for 01RTT
2023-03-28BUG/MEDIUM: applet: only set appctx->sedesc on successful allocation
2023-03-28BUG/MEDIUM: mux-h1: properly destroy a partially allocated h1s
2023-03-28BUG/MINOR: stconn: fix sedesc memory leak on stream allocation failure
2023-03-28BUG/MEDIUM: stconn: don't set the type before allocation succeeds
2023-03-28BUG/MEDIUM: mux-h2: erase h2c->wait_event.tasklet on error path
2023-03-28BUG/MEDIUM: mux-h2: do not try to free an unallocated h2s->sd
2023-03-28BUG/MEDIUM: stream: do not try to free a failed stream-conn
2023-03-26BUG/MAJOR: poller: drop FD's tgid when masks don't match

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