Skip to main content
VulnerabilityPublished Updated

CVE-2026-89955: Linux kernel · s390/vfio-ap: Fix NULL deref in status_show() during queue probe

Affects Linux kernelSource CVE Database V5

0
Compare

Not known to be exploited · fixed in e102ce0f4af99dff769a4b1b4daa4cc6bd5ad2d9 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 13:03 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in e102ce0f4af99dff769a4b1b4daa4cc6bd5ad2d9, dd6f4ef6f8a37412909ad787c837332fb070159c, 69632952aca04caa71e49953b6949fc04e788e67 +3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 260f3ea141382386e97611e7c2029bc013088ab1, < e102ce0f4af99dff769a4b1b4daa4cc6bd5ad2d9
Fixed in
  • e102ce0f4af99dff769a4b1b4daa4cc6bd5ad2d9
LinuxLinuxAffected
  • ≥ 260f3ea141382386e97611e7c2029bc013088ab1, < dd6f4ef6f8a37412909ad787c837332fb070159c
Fixed in
  • dd6f4ef6f8a37412909ad787c837332fb070159c
LinuxLinuxAffected
  • ≥ 260f3ea141382386e97611e7c2029bc013088ab1, < 69632952aca04caa71e49953b6949fc04e788e67
Fixed in
  • 69632952aca04caa71e49953b6949fc04e788e67
LinuxLinuxAffected
  • ≥ 260f3ea141382386e97611e7c2029bc013088ab1, < 10606c9af18baed75cd180b96ee695441aa15134
Fixed in
  • 10606c9af18baed75cd180b96ee695441aa15134
LinuxLinuxAffected
  • ≥ 260f3ea141382386e97611e7c2029bc013088ab1, < 31fa0a8a3c337ed2d200166d6926ab23c14f8b2e
Fixed in
  • 31fa0a8a3c337ed2d200166d6926ab23c14f8b2e
LinuxLinuxAffected
  • ≥ 260f3ea141382386e97611e7c2029bc013088ab1, < 7db2511fc601ca3a6e3fb1bdce02261c3c3167c3
Fixed in
  • 7db2511fc601ca3a6e3fb1bdce02261c3c3167c3

AI-suggested

A patch is available and has been applied in the Linux kernel. Users should update to a fixed kernel version containing the commits identified by the provided fixed version hashes. Since this is a kernel-level issue, applying the official kernel update is the recommended remediation. No additional mitigations are indicated.

Description

A NULL pointer dereference vulnerability in the Linux kernel's s390 vfio-ap driver was fixed. The issue occurs during queue probe when a sysfs attribute group is created before the queue's driver data is set, allowing a concurrent read to dereference a NULL pointer. The fix involves acquiring update locks before creating the sysfs group to prevent concurrent access to uninitialized data.

References

Community reviews

Loading reviews…