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openSUSE Kernel Important Heap Overflow Fix 2026-2520-1

opensuse
Calendar Grey June 23, 2026
Dist Opensuse Esm H88
This update addresses critical kernel security issues in openSUSE fixing five vulnerabilities effectively. Stay protected!
An update that solves five vulnerabilities and has one security fix can now be installed.

Description

This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.45 fixes

various security issues

The following security issues were fixed:

* 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-2026-31694: 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 fix important kernel OpenSUSE thread

Patch

## 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 Live Patching 15-SP7

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP7-2026-2521=1 SUSE-SLE-

Module-Live-Patching-15-SP7-2026-2522=1 SUSE-SLE-Module-Live-

Patching-15-SP7-2026-2509=1 SUSE-SLE-Module-Live-Patching-15-SP7-2026-2508=1

* SUSE Linux Enterprise Live Patching 15-SP6

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP6-2026-2520=1

* openSUSE Leap 15.6

zypper in -t patch SUSE-2026-2520=1

Package List

* SUSE Linux Enterprise Live Patching 15-SP6 (ppc64le s390x x86_64)

* kernel-livepatch-SLE15-SP6_Update_22-debugsource-5-150600.2.1

* kernel-livepatch-6_4_0-150600_23_95-default-debuginfo-5-150600.2.1

* kernel-livepatch-6_4_0-150600_23_95-default-5-150600.2.1

* openSUSE Leap 15.6 (ppc64le s390x x86_64)

* kernel-livepatch-SLE15-SP6_Update_22-debugsource-5-150600.2.1

* kernel-livepatch-6_4_0-150600_23_95-default-debuginfo-5-150600.2.1

* kernel-livepatch-6_4_0-150600_23_95-default-5-150600.2.1

* SUSE Linux Enterprise Live Patching 15-SP7 (ppc64le s390x x86_64)

* kernel-livepatch-SLE15-SP7_Update_11-debugsource-5-150700.2.1

* kernel-livepatch-6_4_0-150700_53_40-default-debuginfo-4-150700.2.1

* kernel-livepatch-SLE15-SP7_Update_13-debugsource-3-150700.2.1

* kernel-livepatch-SLE15-SP7_Update_12-debugsource-4-150700.2.1

* kernel-livepatch-6_4_0-150700_53_40-default-4-150700.2.1

* kernel-livepatch-6_4_0-150700_53_45-default-debuginfo-3-150700.2.1

*...

Read the Full Advisory

References

* bsc#1261640

* bsc#1263088

* bsc#1263902

* bsc#1266229

* bsc#1267625

* bsc#1268282

## References:

* https://www.suse.com/security/cve/CVE-2026-31402.html

* https://www.suse.com/security/cve/CVE-2026-31504.html

* https://www.suse.com/security/cve/CVE-2026-31694.html

* https://www.suse.com/security/cve/CVE-2026-43503.html

* https://www.suse.com/security/cve/CVE-2026-46323.html

* https://bugzilla.suse.com/show_bug.cgi?id=1261640

* https://bugzilla.suse.com/show_bug.cgi?id=1263088

* https://bugzilla.suse.com/show_bug.cgi?id=1263902

* https://bugzilla.suse.com/show_bug.cgi?id=1266229

* https://bugzilla.suse.com/show_bug.cgi?id=1267625

* https://bugzilla.suse.com/show_bug.cgi?id=1268282

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2520-1
Release Date: 2026-06-23T07:34:15Z
Affected Products: * openSUSE Leap 15.6 * SUSE Linux Enterprise Live Patching 15-SP6 * SUSE Linux Enterprise Live Patching 15-SP7 * SUSE Linux Enterprise Real Time 15 SP6 * SUSE Linux Enterprise Real Time 15 SP7 * SUSE Linux Enterprise Server 15 SP6 * SUSE Linux Enterprise Server 15 SP7 * SUSE Linux Enterprise Server for SAP Applications 15 SP6 * SUSE Linux Enterprise Server for SAP Applications 15 SP7

Topics%20covered

Topics Covered

security advisory security fix important kernel OpenSUSE thread

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