NULL Pointer Dereference Affecting cephfs-kmp-64kb package, versions <1.0_k6.4.0_150700.53.84-150700.15.7.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.14% (4th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-SLES157-CEPHFSKMP64KB-22262021
  • published6 Nov 2026
  • disclosed5 Nov 2026

Introduced: 5 Nov 2026

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

How to fix?

Upgrade SLES:15.7 cephfs-kmp-64kb to version 1.0_k6.4.0_150700.53.84-150700.15.7.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cephfs-kmp-64kb package and not the cephfs-kmp-64kb package as distributed by SLES. See How to fix? for SLES:15.7 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