NULL Pointer Dereference Affecting kernel-source package, versions <6.12.0-160000.28.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-SLES1600-KERNELSOURCE-16332187
  • published1 May 2026
  • disclosed20 Apr 2026

Introduced: 20 Apr 2026

NewCVE-2026-23201  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 kernel-source to version 6.12.0-160000.28.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-source package and not the kernel-source package as distributed by SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

ceph: fix oops due to invalid pointer for kfree() in parse_longname()

This fixes a kernel oops when reading ceph snapshot directories (.snap), for example by simply running ls /mnt/my_ceph/.snap.

The variable str is guarded by _free(kfree), but advanced by one for skipping the initial '' in snapshot names. Thus, kfree() is called with an invalid pointer. This patch removes the need for advancing the pointer so kfree() is called with correct memory pointer.

Steps to reproduce:

  1. Create snapshots on a cephfs volume (I've 63 snaps in my testcase)

  2. Add cephfs mount to fstab $ echo "samba-fileserver@.files=/volumes/datapool/stuff/3461082b-ecc9-4e82-8549-3fd2590d3fb6 /mnt/test/stuff ceph acl,noatime,_netdev 0 0" >> /etc/fstab

  3. Reboot the system $ systemctl reboot

  4. Check if it's really mounted $ mount | grep stuff

  5. List snapshots (expected 63 snapshots on my system) $ ls /mnt/test/stuff/.snap

Now ls hangs forever and the kernel log shows the oops.

CVSS Base Scores

version 3.1