CVE-2026-43043

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-43043
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().

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

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

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
History

08 May 2026, 18:57

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
References () https://git.kernel.org/stable/c/00cbdec17c15d024a1c5002c7365df7624a18a75 - () https://git.kernel.org/stable/c/00cbdec17c15d024a1c5002c7365df7624a18a75 - Patch
References () https://git.kernel.org/stable/c/44eafa39363e8d5dfda6a8c6eb6b45458ed4b948 - () https://git.kernel.org/stable/c/44eafa39363e8d5dfda6a8c6eb6b45458ed4b948 - Patch
References () https://git.kernel.org/stable/c/4b03ab0a587ec57eb7ddb5c115d84a42896f60f7 - () https://git.kernel.org/stable/c/4b03ab0a587ec57eb7ddb5c115d84a42896f60f7 - Patch
References () https://git.kernel.org/stable/c/62397b493e14107ae82d8b80938f293d95425bcb - () https://git.kernel.org/stable/c/62397b493e14107ae82d8b80938f293d95425bcb - Patch
References () https://git.kernel.org/stable/c/7195350fb78538c25cd790d703f8f2c73ee0d395 - () https://git.kernel.org/stable/c/7195350fb78538c25cd790d703f8f2c73ee0d395 - Patch
References () https://git.kernel.org/stable/c/7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49 - () https://git.kernel.org/stable/c/7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49 - Patch
References () https://git.kernel.org/stable/c/f48d3dd99199180cf37d6253550c55e86372309a - () https://git.kernel.org/stable/c/f48d3dd99199180cf37d6253550c55e86372309a - Patch
References () https://git.kernel.org/stable/c/f9acceae7b004956851fd4268edf9f518a9bce04 - () https://git.kernel.org/stable/c/f9acceae7b004956851fd4268edf9f518a9bce04 - Patch
CWE CWE-476
First Time Linux linux Kernel
Linux

01 May 2026, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-01 15:16

Updated : 2026-05-08 18:57

NVD link : CVE-2026-43043

Mitre link : CVE-2026-43043

CVE.ORG link : CVE-2026-43043

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference