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VulnerabilityPublished Updated

CVE-2026-23019: Linux kernel · net: marvell: prestera: fix NULL dereference on devlink_alloc() failure

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in a428e0da1248c353557970848994f35fd3f005e2 : update Linux kernel when convenient.

Data as of 10 Nov 2026, 13:03 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
Patch
Available – fixed in a428e0da1248c353557970848994f35fd3f005e2, 3950054c9512add0cc79ab7e72b6d2f9f675e25b, 326a4b7e61d01db3507f71c8bb5e85362f607064 +3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 31 Jan 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 10 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 34dd1710f5a3c9a7dc78e1ff6de69a19d407db25, < a428e0da1248c353557970848994f35fd3f005e2
Fixed in
  • a428e0da1248c353557970848994f35fd3f005e2
LinuxLinuxAffected
  • ≥ 34dd1710f5a3c9a7dc78e1ff6de69a19d407db25, < 3950054c9512add0cc79ab7e72b6d2f9f675e25b
Fixed in
  • 3950054c9512add0cc79ab7e72b6d2f9f675e25b
LinuxLinuxAffected
  • ≥ 34dd1710f5a3c9a7dc78e1ff6de69a19d407db25, < 326a4b7e61d01db3507f71c8bb5e85362f607064
Fixed in
  • 326a4b7e61d01db3507f71c8bb5e85362f607064
LinuxLinuxAffected
  • ≥ 34dd1710f5a3c9a7dc78e1ff6de69a19d407db25, < 325aea74be7e192b5c947c782da23b0d19a5fda2
Fixed in
  • 325aea74be7e192b5c947c782da23b0d19a5fda2
LinuxLinuxAffected
  • ≥ 34dd1710f5a3c9a7dc78e1ff6de69a19d407db25, < 94e070cd50790317fba7787ae6006934b7edcb6f
Fixed in
  • 94e070cd50790317fba7787ae6006934b7edcb6f
LinuxLinuxAffected
  • ≥ 34dd1710f5a3c9a7dc78e1ff6de69a19d407db25, < 8a4333b2818f0d853b43e139936c20659366e4a0
Fixed in
  • 8a4333b2818f0d853b43e139936c20659366e4a0

AI-suggested

A fix is available in the Linux kernel. The issue has been resolved by adding a NULL pointer check in prestera_devlink_alloc(). Users should update to a fixed kernel version containing the referenced commits to mitigate this vulnerability.

Description

A NULL pointer dereference vulnerability was identified and fixed in the Linux kernel's Marvell Prestera driver. The issue occurs because devlink_alloc() can return NULL on allocation failure, but prestera_devlink_alloc() did not check for this and called devlink_priv() unconditionally, leading to a potential kernel crash. The fix adds a NULL check to prevent the crash.

References

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