CVE-2026-43043: Linux kernel · crypto: af-alg – fix NULL pointer dereference in scatterwalk
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f48d3dd99199180cf37d6253550c55e86372309a : patch Linux kernel soon.
Data as of 6 Nov 2026, 16:20 UTC
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
Disclosed: evidence found.
CVE published 1 May 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 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
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
- git.kernel.org/stable/c/f48d3dd99199180cf37d6253550c55e86372309a (opens in a new tab)
- git.kernel.org/stable/c/f9acceae7b004956851fd4268edf9f518a9bce04 (opens in a new tab)
- git.kernel.org/stable/c/7195350fb78538c25cd790d703f8f2c73ee0d395 (opens in a new tab)
- git.kernel.org/stable/c/7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49 (opens in a new tab)
- git.kernel.org/stable/c/44eafa39363e8d5dfda6a8c6eb6b45458ed4b948 (opens in a new tab)
- git.kernel.org/stable/c/00cbdec17c15d024a1c5002c7365df7624a18a75 (opens in a new tab)
- git.kernel.org/stable/c/4b03ab0a587ec57eb7ddb5c115d84a42896f60f7 (opens in a new tab)
- git.kernel.org/stable/c/62397b493e14107ae82d8b80938f293d95425bcb (opens in a new tab)