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SUSE Kernel Important Security Fix CVE-2026-23278 CVE-2026-31402

suse
Calendar Grey July 6, 2026
Dist Suse Esm H88
Critical updates released for SUSE Linux Enterprise Kernel addressing multiple important security issues. Upgrade recommended.
An update that solves seven vulnerabilities and has one fix can now be installed.

Summary

## This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.26.1 fixes various security issues The following security issues were fixed: * CVE-2026-23278: netfilter: nf_tables: always walk all pending catchall elements (bsc#1260907). * CVE-2026-31402: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache (bsc#1261640). * CVE-2026-31504: net: fix fanout UAF in packet_release() via NETDEV_UP race (bsc#1263088). * CVE-2026-31554: futex: Require sys_futex_requeue() to have identical flags (bsc#1263108). * CVE-2026-31694: fuse: reject oversized dirents in page cache (bsc#1263902). * CVE-2026-43503: final dirty.frag related fixes (bsc#1266229). * CVE-2026-46323: net: gro: don't merge zcopy skbs (bsc#1268282). * net/sched: fix pedit partial COW leading to page cache (bsc#1267625).

Topics%20covered

Topics Covered

security advisory security issue SuSE important heap overflow kernel

References

* bsc#1260907

* bsc#1261640

* bsc#1263088

* bsc#1263108

* bsc#1263902

* bsc#1266229

* bsc#1267625

* bsc#1268282

Cross-

* CVE-2026-23278

* CVE-2026-31402

* CVE-2026-31504

* CVE-2026-31554

* CVE-2026-31694

* CVE-2026-43503

* CVE-2026-46323

CVSS scores:

* CVE-2026-23278 ( SUSE ): 7.3

CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

* CVE-2026-23278 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-23278 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-31402 ( SUSE ): 8.8

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

* CVE-2026-31402 ( SUSE ): 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

* CVE-2026-31402 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:22507-1
Release Date: 2026-06-29T07:44:21Z
Rating: important

Topics%20covered

Topics Covered

security advisory security issue SuSE important heap overflow kernel

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