CVE-2025-39676: Linux kernel · scsi: qla4xxx: Prevent a potential error pointer dereference
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f1424c830d6ce840341aac33fe99c8ac45447ac1 : update Linux kernel when convenient.
Data as of 5 Nov 2026, 21:48 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-05.
- Patch
- Available – fixed in f1424c830d6ce840341aac33fe99c8ac45447ac1, f5ad0819f902b4b33591791b92a0350fb3692a6b, f4bc3cdfe95115191e24592bbfc15f1d4a705a75 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 5 Sep 2025
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 5 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 and has been applied in the Linux kernel source code as indicated by the listed fixed commit versions. Users and administrators should update their Linux kernel to a version including these fixes to prevent this issue.
Description
A vulnerability in the Linux kernel's qla4xxx SCSI driver could lead to a kernel Oops due to improper handling of error pointers. The function qla4xxx_get_ep_fwdb() should return NULL on error, but qla4xxx_ep_connect() returns error pointers that propagate and cause a crash. This issue has been fixed by converting error pointers to NULL to prevent dereferencing errors.
References
- git.kernel.org/stable/c/d0225f41ee70611ca88ccb22c8542ecdfa7faea8 (opens in a new tab)
- git.kernel.org/stable/c/ad8a9d38d30c691a77c456e72b78f7932d4f234d (opens in a new tab)
- git.kernel.org/stable/c/325bf7d57c4e2a341e381c5805e454fb69dd78c3 (opens in a new tab)
- git.kernel.org/stable/c/46288d12d1c30d08fbeffd05abc079f57a43a2d4 (opens in a new tab)
- git.kernel.org/stable/c/f5ad0819f902b4b33591791b92a0350fb3692a6b (opens in a new tab)
- git.kernel.org/stable/c/f1424c830d6ce840341aac33fe99c8ac45447ac1 (opens in a new tab)
- git.kernel.org/stable/c/f4bc3cdfe95115191e24592bbfc15f1d4a705a75 (opens in a new tab)
- git.kernel.org/stable/c/9dcf111dd3e7ed5fce82bb108e3a3fc001c07225 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-032379.html (opens in a new tab)