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VulnerabilityPublished Updated

CVE-2026-43043: Linux kernel · crypto: af-alg – fix NULL pointer dereference in scatterwalk

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in f48d3dd99199180cf37d6253550c55e86372309a : patch Linux kernel soon.

Data as of 6 Nov 2026, 16:20 UTC

Severity
High

Rated High 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 f48d3dd99199180cf37d6253550c55e86372309a, f9acceae7b004956851fd4268edf9f518a9bce04, 7195350fb78538c25cd790d703f8f2c73ee0d395 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 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
  • ≥ 8ff590903d5fc7f5a0a988c38267a3d08e6393a2, < f48d3dd99199180cf37d6253550c55e86372309a
Fixed in
  • f48d3dd99199180cf37d6253550c55e86372309a
LinuxLinuxAffected
  • ≥ 8ff590903d5fc7f5a0a988c38267a3d08e6393a2, < f9acceae7b004956851fd4268edf9f518a9bce04
Fixed in
  • f9acceae7b004956851fd4268edf9f518a9bce04
LinuxLinuxAffected
  • ≥ 8ff590903d5fc7f5a0a988c38267a3d08e6393a2, < 7195350fb78538c25cd790d703f8f2c73ee0d395
Fixed in
  • 7195350fb78538c25cd790d703f8f2c73ee0d395
LinuxLinuxAffected
  • ≥ 8ff590903d5fc7f5a0a988c38267a3d08e6393a2, < 62397b493e14107ae82d8b80938f293d95425bcb
Fixed in
  • 62397b493e14107ae82d8b80938f293d95425bcb
LinuxLinuxAffected
  • ≥ 8ff590903d5fc7f5a0a988c38267a3d08e6393a2, < 44eafa39363e8d5dfda6a8c6eb6b45458ed4b948
Fixed in
  • 44eafa39363e8d5dfda6a8c6eb6b45458ed4b948
LinuxLinuxAffected
  • ≥ 8ff590903d5fc7f5a0a988c38267a3d08e6393a2, < 7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49
Fixed in
  • 7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49

AI-suggested

A fix is available in the Linux kernel as indicated by multiple fixed commit versions. Users should update to a kernel version that includes these fixes to prevent kernel panics caused by this NULL pointer dereference.

Description

A NULL pointer dereference vulnerability in the Linux kernel's AF_ALG crypto interface was fixed. The issue occurs when chaining scatter/gather lists (SGLs) for cryptographic operations, where the end marker of a previous SGL is not cleared properly. This leads to a premature end in the crypto scatterwalk, causing a NULL pointer dereference and kernel panic.

References

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