CVE-2026-43043

MEDIUM EPSS 1.8%
Published May 1, 20262mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 1, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: af-alg - fix NULL pointer dereference in scatterwalk The AF_ALG interface fails to unmark the end of a Scatter/Gather List (SGL) when chaining a new af_alg_tsgl structure. If a sendmsg() fills an SGL exactly to MAX_SGL_ENTS, the last entry is marked as the end. A subsequent sendmsg() allocates a new SGL and chains it, but fails to clear the end marker on the previous SGL's last data entry. This causes the crypto scatterwalk to hit a premature end, returning NULL on sg_next() and leading to a kernel panic during dereference. Fix this by explicitly unmarking the end of the previous SGL when performing sg_chain() in af_alg_alloc_tsgl().

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
1.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥2.6.38  –  <5.10.253
linuxlinux_kernel*≥5.11  –  <5.15.203
linuxlinux_kernel*≥5.16  –  <6.1.168
linuxlinux_kernel*≥6.2  –  <6.6.134
linuxlinux_kernel*≥6.7  –  <6.12.81
linuxlinux_kernel*≥6.13  –  <6.18.22
linuxlinux_kernel*≥6.19  –  <6.19.12
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/00cbdec17c15d024a1c5002c7365df7624a18a75
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/44eafa39363e8d5dfda6a8c6eb6b45458ed4b948
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4b03ab0a587ec57eb7ddb5c115d84a42896f60f7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/62397b493e14107ae82d8b80938f293d95425bcb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7195350fb78538c25cd790d703f8f2c73ee0d395
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f48d3dd99199180cf37d6253550c55e86372309a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f9acceae7b004956851fd4268edf9f518a9bce04
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/00cbdec17c15d024a1c5002c7365df7624a18a75
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/44eafa39363e8d5dfda6a8c6eb6b45458ed4b948
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4b03ab0a587ec57eb7ddb5c115d84a42896f60f7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/62397b493e14107ae82d8b80938f293d95425bcb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7195350fb78538c25cd790d703f8f2c73ee0d395
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f48d3dd99199180cf37d6253550c55e86372309a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f9acceae7b004956851fd4268edf9f518a9bce04
    Patch