HAProxy known bugs for version v2.6.18 (maintenance branch 2.6) : 58

This version (2.6.18) is a release belonging to maintenance branch 2.6 whose latest version is 2.6.20. 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

full changelog for 2.6 : here
browse history for 2.6 : here

Other versions in the same branch

This branch contains the following releases :

Date Version Comment

2024-11-08 2.6.20 ⇐ last

2024-09-19 2.6.19

2024-06-18 2.6.18 ⇐ yours

2024-04-05 2.6.17

2023-12-13 2.6.16

2023-08-09 2.6.15

2023-06-09 2.6.14

2023-05-02 2.6.13

2023-03-28 2.6.12

2023-03-17 2.6.11

2023-03-10 2.6.10

2023-02-14 2.6.9

2023-01-24 2.6.8

2022-12-02 2.6.7

2022-09-22 2.6.6

2022-09-03 2.6.5

2022-08-22 2.6.4

2022-08-19 2.6.3

2022-07-22 2.6.2

2022-06-21 2.6.1

2022-05-31 2.6.0

Date	Version	Comment
2024-11-08	2.6.20	⇐ last
2024-09-19	2.6.19
2024-06-18	2.6.18	⇐ yours
2024-04-05	2.6.17
2023-12-13	2.6.16
2023-08-09	2.6.15
2023-06-09	2.6.14
2023-05-02	2.6.13
2023-03-28	2.6.12
2023-03-17	2.6.11
2023-03-10	2.6.10
2023-02-14	2.6.9
2023-01-24	2.6.8
2022-12-02	2.6.7
2022-09-22	2.6.6
2022-09-03	2.6.5
2022-08-22	2.6.4
2022-08-19	2.6.3
2022-07-22	2.6.2
2022-06-21	2.6.1
2022-05-31	2.6.0

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 :

MINOR: the bug presents a limited impact and can easily be mitigated ; users rarely upgrade just for these ones ;
MEDIUM: the bug can cause some undesired behaviour and may require some tricky configuration changes to avoid hitting it ; users normally upgrade to get rid of them, or temporarily disable a functionality.
MAJOR: the bug affects short term reliability and cannot easily be worked around without a significant performance penalty or without a significant functional loss ; such bugs don't stay long in the queue without a release and users must plan an upgrade as soon as possible ;
CRITICAL: this one very rarely happens ; it indicates a short-term reliability or security issue for which there is no workaround. A release will be emitted for this fix even if it's alone and users are urged to upgrade immediately. Some distro maintainers might have been informed in advance in order to agree on a coordinated release date.

Total known bugs in this version by category :

Total CRITICAL MAJOR MEDIUM MINOR

58 0 0 23 35

Total	CRITICAL	MAJOR	MEDIUM	MINOR
58	0	0	23	35

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

Merge date	Subject - Severity (minor, medium, major, critical)
2024-11-08	BUG/MEDIUM: mux-pt: Never fully close the connection on shutdown
2024-11-06	BUG/MINOR: http-ana: Report internal error if an action yields on a final eval
2024-11-06	BUG/MINOR: ssl/cli: 'set ssl cert' does not check the transaction name correctly
2024-11-06	BUG/MEDIUM: server: fix race on servers_list during server deletion
2024-11-06	BUG/MINOR: server: fix dynamic server leak with check on failed init
2024-11-06	BUG/MEDIUM: connection/http-reuse: fix address collision on unhandled address families
2024-11-06	BUG/MINOR: mworker: fix mworker-max-reloads parser
2024-11-06	BUG/MINOR: http-ana: Don't report a server abort if response payload is invalid
2024-11-06	BUG/MEDIUM: hlua: properly handle sample func errors in hlua_run_sample_{fetch,conv}()
2024-11-06	BUG/MEDIUM: hlua: make hlua_ctx_renew() safe
2024-11-06	BUG/MEDIUM: server: server stuck in maintenance after FQDN change
2024-11-06	BUG/MINOR: cfgparse-global: fix allowed args number for setenv
2024-11-06	BUG/MEDIUM: cli: Deadlock when setting frontend maxconn
2024-09-18	BUG/MINOR: cfgparse-listen: fix option httpslog override warning message
2024-09-17	BUG/MEDIUM: promex: Wait to have the request before sending the response
2024-09-17	BUG/MEDIUM: cache/stats: Wait to have the request before sending the response
2024-09-17	BUG/MEDIUM: queue: implement a flag to check for the dequeuing
2024-09-17	BUG/MINOR: polling: fix time reporting when using busy polling
2024-09-17	BUG/MEDIUM: pattern: prevent UAF on reused pattern expr
2024-09-17	BUG/MINOR: pattern: prevent const sample from being tampered in pat_match_beg()
2024-09-17	BUG/MINOR: pattern: do not leave a leading comma on "set" error messages
2024-09-17	BUG/MINOR: pattern: pat_ref_set: return 0 if err was found
2024-09-17	BUG/MINOR: pattern: pat_ref_set: fix UAF reported by coverity
2024-09-17	BUG/MINOR: h3: properly reject too long header responses
2024-09-17	BUG/MINOR: proto_uxst: delete fd from fdtab if listen() fails
2024-09-17	BUG/MINOR: mux-quic: do not send too big MAX_STREAMS ID
2024-09-17	BUG/MINOR: proto_tcp: keep error msg if listen() fails
2024-09-17	BUG/MINOR: proto_tcp: delete fd from fdtab if listen() fails
2024-09-17	BUG/MINOR: quic/trace: make quic_conn_enc_level_init() emit NEW not CLOSE
2024-09-17	BUG/MINOR: trace/quic: make "qconn" selectable as a lockon criterion
2024-09-17	BUG/MINOR: trace: automatically start in waiting mode with "start "
2024-09-17	BUG/MINOR: trace/quic: permit to lock on frontend/connect/session etc
2024-09-17	BUG/MINOR: trace/quic: enable conn/session pointer recovery from quic_conn
2024-09-17	BUG/MINOR: fcgi-app: handle a possible strdup() failure
2024-09-17	BUG/MEDIUM: h2: Only report early HTX EOM for tunneled streams
2024-09-17	BUG/MEDIUM: quic: prevent conn freeze on 0RTT undeciphered content
2024-09-17	BUG/MEDIUM: cli: Always release back endpoint between two commands on the mcli
2024-09-17	BUG/MEDIUM: stream: Prevent mux upgrades if client connection is no longer ready
2024-07-31	BUG/MEDIUM: init: fix fd_hard_limit default in compute_ideal_maxconn
2024-07-31	BUG/MEDIUM: queue: deal with a rare TOCTOU in assign_server_and_queue()
2024-07-31	BUG/MINOR: cli: Atomically inc the global request counter between CLI commands
2024-07-31	BUG/MINOR: server: Don't warn fallback IP is used during init-addr resolution
2024-07-31	BUG/MINOR: stick-table: fix crash for src_inc_gpc() without stkcounter
2024-07-31	BUG/MEDIUM: spoe: Be sure to create a SPOE applet if none on the current thread
2024-07-31	BUG/MEDIUM: h1: Reject empty Transfer-encoding header
2024-07-31	BUG/MINOR: h1: Reject empty coding name as last transfer-encoding value
2024-07-31	BUG/MINOR: h1: Fail to parse empty transfer coding names
2024-07-31	BUG/MEDIUM: jwt: Clear SSL error queue on error when checking the signature
2024-07-31	BUG/MINOR: jwt: fix variable initialisation
2024-07-31	BUG/MINOR: jwt: don't try to load files with HMAC algorithm
2024-07-31	BUG/MINOR: quic: Lack of precision when computing K (cubic only cc)
2024-07-03	BUG/MEDIUM: h3: ensure the ":scheme" pseudo header is totally valid
2024-07-03	BUG/MEDIUM: h3: ensure the ":method" pseudo header is totally valid
2024-07-03	BUG/MINOR: hlua: report proper context upon error in hlua_cli_io_handler_fct()
2024-07-03	BUG/MINOR: quic: fix BUG_ON() on Tx pkt alloc failure
2024-07-03	BUG/MINOR: mux-quic: fix crash on qcs SD alloc failure
2024-07-03	BUG/MINOR: quic: fix computed length of emitted STREAM frames
2024-06-19	BUG/MEDIUM: cli: fix cli_output_msg() regression

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