SUSE-SU-2026:4392-1: important: Security update for cosign
SLE-UPDATES
null at suse.de
Tue Sep 29 17:21:15 UTC 2026
# Security update for cosign
Announcement ID: SUSE-SU-2026:4392-1
Release Date: 2026-09-29T11:49:18Z
Rating: important
References:
* bsc#1272117
* bsc#1275025
* bsc#1278614
* bsc#1279215
* bsc#1282542
Cross-References:
* CVE-2026-56852
* CVE-2026-56854
* CVE-2026-56855
* CVE-2026-56864
* CVE-2026-78662
* CVE-2026-84304
CVSS scores:
* CVE-2026-56852 ( SUSE ): 6.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-56852 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-56852 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-56854 ( SUSE ): 8.6
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
* CVE-2026-56854 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
* CVE-2026-56854 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
* CVE-2026-56855 ( 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-2026-56855 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-56855 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-56864 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
* CVE-2026-56864 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
* CVE-2026-78662 ( 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-2026-78662 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
* CVE-2026-78662 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
* CVE-2026-84304 ( 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-2026-84304 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-84304 ( NVD ): 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Affected Products:
* Basesystem Module 15-SP7
* openSUSE Leap 15.4
* SUSE Linux Enterprise Desktop 15 SP7
* SUSE Linux Enterprise High Performance Computing 15 SP4
* SUSE Linux Enterprise High Performance Computing 15 SP5
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
* SUSE Linux Enterprise Real Time 15 SP7
* SUSE Linux Enterprise Server 15 SP4
* SUSE Linux Enterprise Server 15 SP4 LTSS
* SUSE Linux Enterprise Server 15 SP5
* SUSE Linux Enterprise Server 15 SP5 LTSS
* SUSE Linux Enterprise Server 15 SP6
* SUSE Linux Enterprise Server 15 SP6 LTSS
* SUSE Linux Enterprise Server 15 SP7
* SUSE Linux Enterprise Server for SAP Applications 15 SP4
* SUSE Linux Enterprise Server for SAP Applications 15 SP5
* SUSE Linux Enterprise Server for SAP Applications 15 SP6
* SUSE Linux Enterprise Server for SAP Applications 15 SP7
An update that solves six vulnerabilities can now be installed.
## Description:
This update for cosign fixes the following issues:
* CVE-2026-56852: golang.org/x/text/unicode/norm: infinite loop on
truncated/invalid UTF-8 input (bsc#1272117).
* CVE-2026-56854,CVE-2026-56855,CVE-2026-78662: golang.org/x/crypto/ssh:
authentication bypass and deadlocks in the crypto/ssh library (bsc#1278614).
* CVE-2026-56864: x/mod/sumdb: ignore unrelated, unauthenticated hashes in
Lookup (bsc#1275025).
* CVE-2026-84304: google.golang.org/grpc: heap memory exhaustion via HTTP/2
DATA frame fragmentation (bsc#1279215).
* Verification bypass via public key in legacy bundle (bsc#1282542).
Changes for cosign:
* update to 3.1.3:
* Auto-detect default digest algorithm for public keys
* fix(pkcs11key): return an error instead of panicking when no key pair
matches
* Supporting OCI Signing with X.509 Certificate Chain
* fix: prevent shell completions for various options not taking filenames
* fix(blob): compare file checksums case-insensitively in
* Verification bypass via public key in legacy bundle (GHSA- fx35-mq7g-6g98,
bsc#1282542)
## 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 for SAP Applications 15 SP4
zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-4392
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-4392
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-4392
* openSUSE Leap 15.4
zypper in -t patch SUSE-2026-4392
* SUSE Linux Enterprise Server for SAP Applications 15 SP5
zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-4392
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-4392
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-4392
* SUSE Linux Enterprise Server for SAP Applications 15 SP6
zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-4392
* SUSE Linux Enterprise Server 15 SP4 LTSS
zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-4392
* Basesystem Module 15-SP7
zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-4392
* SUSE Linux Enterprise Server 15 SP5 LTSS
zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-4392
* SUSE Linux Enterprise Server 15 SP6 LTSS
zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-4392
## Package List:
* SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
* cosign-3.1.3-150400.3.57.1
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64
x86_64)
* cosign-3.1.3-150400.3.57.1
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64
x86_64)
* cosign-3.1.3-150400.3.57.1
* openSUSE Leap 15.4 (aarch64 i586 ppc64le s390x x86_64)
* cosign-3.1.3-150400.3.57.1
* cosign-debuginfo-3.1.3-150400.3.57.1
* openSUSE Leap 15.4 (noarch)
* cosign-bash-completion-3.1.3-150400.3.57.1
* cosign-fish-completion-3.1.3-150400.3.57.1
* cosign-zsh-completion-3.1.3-150400.3.57.1
* SUSE Linux Enterprise Server for SAP Applications 15 SP5 (ppc64le x86_64)
* cosign-3.1.3-150400.3.57.1
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64
x86_64)
* cosign-3.1.3-150400.3.57.1
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64
x86_64)
* cosign-3.1.3-150400.3.57.1
* SUSE Linux Enterprise Server for SAP Applications 15 SP6 (ppc64le x86_64)
* cosign-3.1.3-150400.3.57.1
* cosign-debuginfo-3.1.3-150400.3.57.1
* SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
* cosign-3.1.3-150400.3.57.1
* Basesystem Module 15-SP7 (aarch64 ppc64le s390x x86_64)
* cosign-3.1.3-150400.3.57.1
* cosign-debuginfo-3.1.3-150400.3.57.1
* Basesystem Module 15-SP7 (noarch)
* cosign-bash-completion-3.1.3-150400.3.57.1
* cosign-zsh-completion-3.1.3-150400.3.57.1
* SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)
* cosign-3.1.3-150400.3.57.1
* SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 ppc64le s390x x86_64)
* cosign-3.1.3-150400.3.57.1
* cosign-debuginfo-3.1.3-150400.3.57.1
## References:
* https://www.suse.com/security/cve/CVE-2026-56852.html
* https://www.suse.com/security/cve/CVE-2026-56854.html
* https://www.suse.com/security/cve/CVE-2026-56855.html
* https://www.suse.com/security/cve/CVE-2026-56864.html
* https://www.suse.com/security/cve/CVE-2026-78662.html
* https://www.suse.com/security/cve/CVE-2026-84304.html
* https://bugzilla.suse.com/show_bug.cgi?id=1272117
* https://bugzilla.suse.com/show_bug.cgi?id=1275025
* https://bugzilla.suse.com/show_bug.cgi?id=1278614
* https://bugzilla.suse.com/show_bug.cgi?id=1279215
* https://bugzilla.suse.com/show_bug.cgi?id=1282542
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