Alerts This Week
Warning Icon 1 637
Alerts This Week
Warning Icon 1 637

openSUSE Leap 15.5: Important Kernel Update 2025:03400-1 CVEs 21755 & 21756

opensuse
Calendar Grey September 29, 2025
Dist Opensuse Esm H88
Important openSUSE Kernel update addresses six security issues and improves system stability. Patch now to mitigate risks.
An update that solves six vulnerabilities can now be installed.

Description

This update for the Linux Kernel 5.14.21-150500_55_110 fixes several issues.

The following security issues were fixed:

* CVE-2025-38177: sch_hfsc: make hfsc_qlen_notify() idempotent (bsc#1246356).

* CVE-2025-38181: calipso: Fix null-ptr-deref in calipso_req_{set,del}attr()

(bsc#1246001).

* CVE-2025-38498: do_change_type(): refuse to operate on unmounted/not ours

mounts (bsc#1247499).

* CVE-2025-38555: usb: gadget : fix use-after-free in composite_dev_cleanup()

(bsc#1248298).

* CVE-2025-21756: vsock: Keep the binding until socket destruction

(bsc#1245795).

* CVE-2025-21755: vsock: Orphan socket after transport release (bsc#1245795).

Topics%20covered

Topics Covered

security advisory buffer overflow local privilege escalation 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 15.5

zypper in -t patch SUSE-2025-3400=1 SUSE-2025-3401=1 SUSE-2025-3402=1

* SUSE Linux Enterprise Live Patching 15-SP5

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP5-2025-3400=1 SUSE-SLE-

Module-Live-Patching-15-SP5-2025-3401=1 SUSE-SLE-Module-Live-

Patching-15-SP5-2025-3402=1

Package List

* openSUSE Leap 15.5 (ppc64le s390x x86_64)

* kernel-livepatch-SLE15-SP5_Update_23-debugsource-7-150500.2.1

* kernel-livepatch-SLE15-SP5_Update_27-debugsource-5-150500.2.1

* kernel-livepatch-5_14_21-150500_55_100-default-debuginfo-6-150500.2.1

* kernel-livepatch-SLE15-SP5_Update_25-debugsource-6-150500.2.1

* kernel-livepatch-5_14_21-150500_55_110-default-debuginfo-5-150500.2.1

* kernel-livepatch-5_14_21-150500_55_94-default-debuginfo-7-150500.2.1

* kernel-livepatch-5_14_21-150500_55_94-default-7-150500.2.1

* kernel-livepatch-5_14_21-150500_55_100-default-6-150500.2.1

* kernel-livepatch-5_14_21-150500_55_110-default-5-150500.2.1

* SUSE Linux Enterprise Live Patching 15-SP5 (ppc64le s390x x86_64)

* kernel-livepatch-SLE15-SP5_Update_23-debugsource-7-150500.2.1

* kernel-livepatch-SLE15-SP5_Update_27-debugsource-5-150500.2.1

* kernel-livepatch-5_14_21-150500_55_100-default-debuginfo-6-150500.2.1

* kernel-livepatch-SLE15-SP5_Update_25-debugsource-6-150500.2.1

*...

Read the Full Advisory

References

* bsc#1245795

* bsc#1246001

* bsc#1246356

* bsc#1247499

* bsc#1248298

## References:

* https://www.suse.com/security/cve/CVE-2025-21755.html

* https://www.suse.com/security/cve/CVE-2025-21756.html

* https://www.suse.com/security/cve/CVE-2025-38177.html

* https://www.suse.com/security/cve/CVE-2025-38181.html

* https://www.suse.com/security/cve/CVE-2025-38498.html

* https://www.suse.com/security/cve/CVE-2025-38555.html

* https://bugzilla.suse.com/show_bug.cgi?id=1245795

* https://bugzilla.suse.com/show_bug.cgi?id=1246001

* https://bugzilla.suse.com/show_bug.cgi?id=1246356

* https://bugzilla.suse.com/show_bug.cgi?id=1247499

* https://bugzilla.suse.com/show_bug.cgi?id=1248298

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2025:03400-1
Release Date: 2025-09-27T22:03:56Z
Affected Products: * openSUSE Leap 15.5 * SUSE Linux Enterprise High Performance Computing 15 SP5 * SUSE Linux Enterprise Live Patching 15-SP5 * SUSE Linux Enterprise Micro 5.5 * SUSE Linux Enterprise Real Time 15 SP5 * SUSE Linux Enterprise Server 15 SP5 * SUSE Linux Enterprise Server for SAP Applications 15 SP5

Topics%20covered

Topics Covered

security advisory buffer overflow local privilege escalation important kernel OpenSUSE

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Related News

Your message here