SUSE-SU-2026:3919-1: critical: Security update for dovecot22
SLE-UPDATES
null at suse.de
Wed Sep 2 12:43:34 UTC 2026
# Security update for dovecot22
Announcement ID: SUSE-SU-2026:3919-1
Release Date: 2026-09-02T07:31:58Z
Rating: critical
References:
* bsc#1276792
* bsc#1276795
* bsc#1276799
* bsc#1276800
* bsc#1276802
* bsc#1276804
* bsc#1276809
* bsc#1276811
* bsc#1276812
* bsc#1276815
* bsc#1276817
* bsc#1276827
* bsc#1276833
* bsc#1276835
* bsc#1276837
Cross-References:
* CVE-2026-27852
* CVE-2026-33604
* CVE-2026-33605
* CVE-2026-33606
* CVE-2026-33607
* CVE-2026-40014
* CVE-2026-40015
* CVE-2026-40019
* CVE-2026-40203
* CVE-2026-42007
* CVE-2026-42391
* CVE-2026-42393
* CVE-2026-52687
* CVE-2026-73209
CVSS scores:
* CVE-2026-27852 ( SUSE ): 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-27852 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-27852 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-33604 ( SUSE ): 8.2
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
* CVE-2026-33604 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
* CVE-2026-33604 ( NVD ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
* CVE-2026-33605 ( SUSE ): 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-33605 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-33605 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-33606 ( SUSE ): 5.7
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
* CVE-2026-33606 ( SUSE ): 4.8 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
* CVE-2026-33606 ( NVD ): 4.8 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
* CVE-2026-33607 ( SUSE ): 5.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
* CVE-2026-33607 ( SUSE ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-33607 ( NVD ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-40014 ( SUSE ): 6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-40014 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
* CVE-2026-40014 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
* CVE-2026-40015 ( SUSE ): 5.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
* CVE-2026-40015 ( SUSE ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-40015 ( NVD ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-40019 ( SUSE ): 8.2
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-40019 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-40019 ( NVD ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-40203 ( SUSE ): 6.3
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
* CVE-2026-40203 ( SUSE ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
* CVE-2026-40203 ( NVD ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
* CVE-2026-42007 ( SUSE ): 8.5
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:L/SI:L/SA:H
* CVE-2026-42007 ( SUSE ): 9.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H
* CVE-2026-42007 ( NVD ): 9.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H
* CVE-2026-42391 ( SUSE ): 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-42391 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-42391 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-42393 ( SUSE ): 2.3
CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
* CVE-2026-42393 ( SUSE ): 3.1 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
* CVE-2026-42393 ( NVD ): 3.1 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
* CVE-2026-52687 ( SUSE ): 7.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-52687 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-52687 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-73209 ( SUSE ): 7.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:L/SI:N/SA:N
* CVE-2026-73209 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-73209 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Products:
* SUSE Linux Enterprise High Performance Computing 12 SP5
* SUSE Linux Enterprise Server 12 SP5
* SUSE Linux Enterprise Server 12 SP5 LTSS
* SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
* SUSE Linux Enterprise Server for SAP Applications 12 SP5
An update that solves 14 vulnerabilities and has one security fix can now be
installed.
## Description:
This update for dovecot22 fixes the following issues:
Security issues fixed:
* CVE-2026-27852: DoS by sending mail with bad header (bsc#1276799).
* CVE-2026-33604: SMTP smuggling via missing dot-stuffing after bare carriage
return (bsc#1276802).
* CVE-2026-33605: `managesieve-login`: pre-auth crash (bsc#1276809).
* CVE-2026-33606: `dsync`: mail content can cause `dsync` protocol injection
(bsc#1276800).
* CVE-2026-33607: IMAP `LIST` `match_sub()` exponential backtracking leading
to CPU denial of service (bsc#1276795).
* CVE-2026-40014: CPU DoS via crafted references header (bsc#1276804).
* CVE-2026-40015: `imap-hibernate` can be crashed (bsc#1276812).
* CVE-2026-40019: `managesieve-login` pre-auth infinite loop (bsc#1276811).
* CVE-2026-40203: IMAP compression can reveal whether a small synced email
body matches sender-chosen text (bsc#1276815).
* CVE-2026-42007: `sieve` `editheader` RCE (bsc#1276817).
* CVE-2026-42391: `imap`: pre-login memory/CPU growth with `ID` command
(bsc#1276835).
* CVE-2026-42393: `doveadm_password` or api key length can be leaked with
timing comparisons (bsc#1276827).
* CVE-2026-52687: `imap`: `COMPRESS ZSTD` can cause excessive memory usage
(bsc#1276837).
* CVE-2026-73209: `imap-login` crash due to self-recursion on zero-output
decompress chunks (bsc#1276833).
* multiple security fixes (bsc#1276792).
Other updates and bugfixes:
* Non-CVE hardening taken from the same upstream release:
* `sieve`: requiring the same extension repeatedly grew the default argument
override chain, which is walked recursively - a crafted script could
overflow the stack
* `sieve`: `${unicode:...}` hex values could overflow an `unsigned int` and
wrap back into the valid Unicode range; the hex parser also read one byte
past the end of the buffer
* `sieve` variables: the `${1234...}` numeric index overflowed a `signed int`
* `sieve enotify`: a single script could emit an unlimited number of
notification messages; limited to 10 as upstream does
## Patch Instructions:
To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:
* SUSE Linux Enterprise Server 12 SP5 LTSS
zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-3919=1
* SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-3919=1
## Package List:
* SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
* dovecot22-backend-pgsql-2.2.31-19.40.1
* dovecot22-devel-2.2.31-19.40.1
* dovecot22-backend-sqlite-debuginfo-2.2.31-19.40.1
* dovecot22-backend-mysql-debuginfo-2.2.31-19.40.1
* dovecot22-debugsource-2.2.31-19.40.1
* dovecot22-backend-mysql-2.2.31-19.40.1
* dovecot22-debuginfo-2.2.31-19.40.1
* dovecot22-backend-pgsql-debuginfo-2.2.31-19.40.1
* dovecot22-2.2.31-19.40.1
* dovecot22-backend-sqlite-2.2.31-19.40.1
* SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
* dovecot22-backend-pgsql-2.2.31-19.40.1
* dovecot22-devel-2.2.31-19.40.1
* dovecot22-backend-sqlite-debuginfo-2.2.31-19.40.1
* dovecot22-backend-mysql-debuginfo-2.2.31-19.40.1
* dovecot22-debugsource-2.2.31-19.40.1
* dovecot22-backend-mysql-2.2.31-19.40.1
* dovecot22-debuginfo-2.2.31-19.40.1
* dovecot22-backend-pgsql-debuginfo-2.2.31-19.40.1
* dovecot22-2.2.31-19.40.1
* dovecot22-backend-sqlite-2.2.31-19.40.1
## References:
* https://www.suse.com/security/cve/CVE-2026-27852.html
* https://www.suse.com/security/cve/CVE-2026-33604.html
* https://www.suse.com/security/cve/CVE-2026-33605.html
* https://www.suse.com/security/cve/CVE-2026-33606.html
* https://www.suse.com/security/cve/CVE-2026-33607.html
* https://www.suse.com/security/cve/CVE-2026-40014.html
* https://www.suse.com/security/cve/CVE-2026-40015.html
* https://www.suse.com/security/cve/CVE-2026-40019.html
* https://www.suse.com/security/cve/CVE-2026-40203.html
* https://www.suse.com/security/cve/CVE-2026-42007.html
* https://www.suse.com/security/cve/CVE-2026-42391.html
* https://www.suse.com/security/cve/CVE-2026-42393.html
* https://www.suse.com/security/cve/CVE-2026-52687.html
* https://www.suse.com/security/cve/CVE-2026-73209.html
* https://bugzilla.suse.com/show_bug.cgi?id=1276792
* https://bugzilla.suse.com/show_bug.cgi?id=1276795
* https://bugzilla.suse.com/show_bug.cgi?id=1276799
* https://bugzilla.suse.com/show_bug.cgi?id=1276800
* https://bugzilla.suse.com/show_bug.cgi?id=1276802
* https://bugzilla.suse.com/show_bug.cgi?id=1276804
* https://bugzilla.suse.com/show_bug.cgi?id=1276809
* https://bugzilla.suse.com/show_bug.cgi?id=1276811
* https://bugzilla.suse.com/show_bug.cgi?id=1276812
* https://bugzilla.suse.com/show_bug.cgi?id=1276815
* https://bugzilla.suse.com/show_bug.cgi?id=1276817
* https://bugzilla.suse.com/show_bug.cgi?id=1276827
* https://bugzilla.suse.com/show_bug.cgi?id=1276833
* https://bugzilla.suse.com/show_bug.cgi?id=1276835
* https://bugzilla.suse.com/show_bug.cgi?id=1276837
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