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openSUSE 15.5 Kernel Important Security Issues 2026-1899-1

opensuse
Calendar Grey May 18, 2026
Dist Opensuse Esm H88
Important security update for openSUSE 15.5 addressing five vulnerabilities for better system protection and stability.
An update that solves five vulnerabilities can now be installed.

Description

The SUSE Linux Enterprise 15 SP5 RT kernel was updated to fix various security

issues

The following security issues were fixed:

* CVE-2025-54518: x86/CPU/AMD: Prevent improper isolation of shared resources

in Zen2's op cache (bsc#1264013).

* CVE-2026-46300: net: skbuff: propagate shared-frag marker through

pskb_copy() (bsc#1265209).

* CVE-2026-43284: xfrm: esp: avoid in-place decrypt on shared skb frags

(bsc#1264449).

* CVE-2026-43500: rxrpc: Also unshare DATA/RESPONSE packets when paged frags

are present (aka Dirty Frag) (bsc#1264450).

* CVE-2026-46333: ptrace: Logic bug in the Linux kernel's

__ptrace_may_access() function (bsc#1265308).

The following non security issues were fixed:

* io-wq: check that the predecessor is hashed in io_wq_remove_pending() (git-

fixes).

## Special Instructions and Notes:

* Please reboot the system after installing this update.

Topics%20covered

Topics Covered

security advisory security issue remote access 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-2026-1899=1

* SUSE Linux Enterprise Micro 5.5

zypper in -t patch SUSE-SLE-Micro-5.5-2026-1899=1

Package List

* openSUSE Leap 15.5 (noarch)

* kernel-source-rt-5.14.21-150500.13.137.1

* kernel-devel-rt-5.14.21-150500.13.137.1

* openSUSE Leap 15.5 (x86_64)

* kernel-rt-extra-5.14.21-150500.13.137.1

* kernel-rt_debug-debuginfo-5.14.21-150500.13.137.1

* kernel-rt-extra-debuginfo-5.14.21-150500.13.137.1

* kernel-rt_debug-debugsource-5.14.21-150500.13.137.1

* kernel-rt-livepatch-devel-5.14.21-150500.13.137.1

* kernel-rt_debug-devel-5.14.21-150500.13.137.1

* kselftests-kmp-rt-debuginfo-5.14.21-150500.13.137.1

* kernel-rt-debugsource-5.14.21-150500.13.137.1

* kernel-rt-optional-debuginfo-5.14.21-150500.13.137.1

* kernel-rt-optional-5.14.21-150500.13.137.1

* kernel-rt-vdso-debuginfo-5.14.21-150500.13.137.1

* dlm-kmp-rt-debuginfo-5.14.21-150500.13.137.1

* kernel-rt_debug-vdso-debuginfo-5.14.21-150500.13.137.1

* kernel-rt-devel-5.14.21-150500.13.137.1

* ocfs2-kmp-rt-debuginfo-5.14.21-150500.13.137.1

* ocfs2-kmp-rt-5.14.21-150500.13.137.1

* kernel-rt-vdso-5.14.21-150500.13.137.1

* kernel-rt-livepatch-5.14.21-150500.13.137.1

*...

Read the Full Advisory

References

* bsc#1264013

* bsc#1264449

* bsc#1264450

* bsc#1265209

* bsc#1265308

## References:

* https://www.suse.com/security/cve/CVE-2025-54518.html

* https://www.suse.com/security/cve/CVE-2026-43284.html

* https://www.suse.com/security/cve/CVE-2026-43500.html

* https://www.suse.com/security/cve/CVE-2026-46300.html

* https://www.suse.com/security/cve/CVE-2026-46333.html

* https://bugzilla.suse.com/show_bug.cgi?id=1264013

* https://bugzilla.suse.com/show_bug.cgi?id=1264449

* https://bugzilla.suse.com/show_bug.cgi?id=1264450

* https://bugzilla.suse.com/show_bug.cgi?id=1265209

* https://bugzilla.suse.com/show_bug.cgi?id=1265308

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:1899-1
Release Date: 2026-05-17T13:17:08Z
Affected Products: * openSUSE Leap 15.5 * SUSE Linux Enterprise Micro 5.5

Topics%20covered

Topics Covered

security advisory security issue remote access important kernel OpenSUSE

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