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VulnerabilityPublished Updated

CVE-2026-45857: Linux kernel · scsi: csiostor: Fix dereference of null pointer rn

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in 1982257570b84dc33753d536dd969fd357a014e9 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:17 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
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, 2026-11-06.

Patch
Available – fixed in 1982257570b84dc33753d536dd969fd357a014e9, 6037124dbf675fbd0a6248aaf04cf07387b8c323, 526ea3c0ccd495b0079db3e28fdddd51c1bf01f7 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 May 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 6 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ a3667aaed5698b84bad2f1b3f71adc86499f4bc6, < 1982257570b84dc33753d536dd969fd357a014e9
Fixed in
  • 1982257570b84dc33753d536dd969fd357a014e9
LinuxLinuxAffected
  • ≥ a3667aaed5698b84bad2f1b3f71adc86499f4bc6, < 6037124dbf675fbd0a6248aaf04cf07387b8c323
Fixed in
  • 6037124dbf675fbd0a6248aaf04cf07387b8c323
LinuxLinuxAffected
  • ≥ a3667aaed5698b84bad2f1b3f71adc86499f4bc6, < 526ea3c0ccd495b0079db3e28fdddd51c1bf01f7
Fixed in
  • 526ea3c0ccd495b0079db3e28fdddd51c1bf01f7
LinuxLinuxAffected
  • ≥ a3667aaed5698b84bad2f1b3f71adc86499f4bc6, < 44ef9f81392de885883f73b9f5c43936a82ae9d7
Fixed in
  • 44ef9f81392de885883f73b9f5c43936a82ae9d7
LinuxLinuxAffected
  • ≥ a3667aaed5698b84bad2f1b3f71adc86499f4bc6, < 25d623f0d77c11a256a54e860d00c239aa9a2583
Fixed in
  • 25d623f0d77c11a256a54e860d00c239aa9a2583
LinuxLinuxAffected
  • ≥ a3667aaed5698b84bad2f1b3f71adc86499f4bc6, < 25ab5e97d3c5f3ed594b4a65d1cc99dc24756681
Fixed in
  • 25ab5e97d3c5f3ed594b4a65d1cc99dc24756681

AI-suggested

A fix is available and has been applied in the Linux kernel. Users should update to the fixed kernel versions referenced by the commit hashes provided. No additional mitigation is required.

Description

A null pointer dereference vulnerability in the Linux kernel's scsi csiostor driver was fixed. The issue occurred when the error exit path dereferenced a null pointer 'rn' due to improper handling after using the CSIO_INC_STATS macro. A new error return path was added to prevent this dereference.

References

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