CVE-2026-23019: Linux kernel · net: marvell: prestera: fix NULL dereference on devlink_alloc() failure
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in a428e0da1248c353557970848994f35fd3f005e2 : update Linux kernel when convenient.
Data as of 10 Nov 2026, 13:03 UTC
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
Disclosed: evidence found.
CVE published 31 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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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
- git.kernel.org/stable/c/8a4333b2818f0d853b43e139936c20659366e4a0 (opens in a new tab)
- git.kernel.org/stable/c/325aea74be7e192b5c947c782da23b0d19a5fda2 (opens in a new tab)
- git.kernel.org/stable/c/94e070cd50790317fba7787ae6006934b7edcb6f (opens in a new tab)
- git.kernel.org/stable/c/3950054c9512add0cc79ab7e72b6d2f9f675e25b (opens in a new tab)
- git.kernel.org/stable/c/326a4b7e61d01db3507f71c8bb5e85362f607064 (opens in a new tab)
- git.kernel.org/stable/c/a428e0da1248c353557970848994f35fd3f005e2 (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)