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openSUSE 15.6: Linux Kernel Important Security Update CVE-2025-21659

opensuse
Calendar Grey September 16, 2025
Dist Opensuse Esm H88
Essential kernel security patch for openSUSE targeting several vulnerabilities. Ensure to refresh your system without delay to maintain protection.
An update that solves eight vulnerabilities and has one security fix can now be installed.

Description

This update for the Linux Kernel 6.4.0-150600_23_42 fixes several issues.

The following security issues were fixed:

* CVE-2025-38087: net/sched: fix use-after-free in taprio_dev_notifier

(bsc#1245504).

* CVE-2025-21999: proc: fix UAF in proc_get_inode() (bsc#1242579).

* CVE-2025-38001: net_sched: hfsc: Address reentrant enqueue adding class to

eltree twice (bsc#1244235).

* CVE-2025-21659: netdev: prevent accessing NAPI instances from another

namespace (bsc#1236207).

* CVE-2025-38000: sch_hfsc: Fix qlen accounting bug when using peek in

hfsc_enqueue() (bsc#1245775).

* CVE-2025-37890: net_sched: hfsc: Fix a UAF vulnerability in class with netem

as child qdisc (bsc#1245791).

* CVE-2025-21701: net: avoid race between device unregistration and ethnl ops

(bsc#1245805).

* CVE-2025-38212: ipc: fix to protect IPCS lookups using RCU (bsc#1246030).

Topics%20covered

Topics Covered

security advisory remote access security fix important kernel OpenSUSE

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:

* openSUSE Leap 15.6

zypper in -t patch SUSE-2025-3235=1

* SUSE Linux Enterprise Live Patching 15-SP6

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP6-2025-3235=1

Package List

* openSUSE Leap 15.6 (ppc64le s390x x86_64)

* kernel-livepatch-SLE15-SP6_Update_9-debugsource-6-150600.2.1

* kernel-livepatch-6_4_0-150600_23_42-default-6-150600.2.1

* kernel-livepatch-6_4_0-150600_23_42-default-debuginfo-6-150600.2.1

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

* kernel-livepatch-SLE15-SP6_Update_9-debugsource-6-150600.2.1

* kernel-livepatch-6_4_0-150600_23_42-default-6-150600.2.1

* kernel-livepatch-6_4_0-150600_23_42-default-debuginfo-6-150600.2.1

References

* bsc#1236207

* bsc#1242579

* bsc#1244235

* bsc#1245505

* bsc#1245775

* bsc#1245791

* bsc#1245805

* bsc#1246030

* bsc#1248108

## References:

* https://www.suse.com/security/cve/CVE-2025-21659.html

* https://www.suse.com/security/cve/CVE-2025-21701.html

* https://www.suse.com/security/cve/CVE-2025-21999.html

* https://www.suse.com/security/cve/CVE-2025-37890.html

* https://www.suse.com/security/cve/CVE-2025-38000.html

* https://www.suse.com/security/cve/CVE-2025-38001.html

* https://www.suse.com/security/cve/CVE-2025-38087.html

* https://www.suse.com/security/cve/CVE-2025-38212.html

* https://bugzilla.suse.com/show_bug.cgi?id=1236207

* https://bugzilla.suse.com/show_bug.cgi?id=1242579

* https://bugzilla.suse.com/show_bug.cgi?id=1244235

* https://bugzilla.suse.com/show_bug.cgi?id=1245505

* https://bugzilla.suse.com/show_bug.cgi?id=1245775

* https://bugzilla.suse.com/show_bug.cgi?id=1245791

* https://bugzilla.suse.com/show_bug.cgi?id=1245805

* https://bugzilla.suse.com/show_bug.cgi?id=1246030

*...

Read the Full Advisory

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2025:03235-1
Release Date: 2025-09-15T14:06:02Z
Affected Products: * openSUSE Leap 15.6 * SUSE Linux Enterprise Live Patching 15-SP6 * SUSE Linux Enterprise Real Time 15 SP6 * SUSE Linux Enterprise Server 15 SP6 * SUSE Linux Enterprise Server for SAP Applications 15 SP6

Topics%20covered

Topics Covered

security advisory remote access security fix important kernel OpenSUSE

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