CVE-2026-43452

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-43452
In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: guard option walkers against 1-byte tail reads When the last byte of options is a non-single-byte option kind, walkers that advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end of the option area. Add an explicit i == optlen - 1 check before dereferencing op[i + 1] in xt_tcpudp and xt_dccp option walkers.

8.2 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c Patch
https://git.kernel.org/stable/c/9b94f0e42ed248eb31929da84ed9f5310d7ff540 Patch
https://git.kernel.org/stable/c/ae1e1267650638136b84c23f2b31250f0ccb6823 Patch
https://git.kernel.org/stable/c/bc18551c6169eac5ed813778d3e3e484002dbbe5 Patch
https://git.kernel.org/stable/c/c2a445367a496a3c25dbc940c10c8bd1cfd4c14a Patch
https://git.kernel.org/stable/c/c39f84e4be1be63fc60ca7141ea7b76edcea5907 Patch
https://git.kernel.org/stable/c/cfe770220ac2dbd3e104c6b45094037455da81d4 Patch
https://git.kernel.org/stable/c/d04800323336eebf441d153f43234eac9b833d36 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:*:*:*:*:*:*
History

21 May 2026, 16:54

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
CWE NVD-CWE-noinfo
CPE 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:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c - () https://git.kernel.org/stable/c/5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c - Patch
References () https://git.kernel.org/stable/c/9b94f0e42ed248eb31929da84ed9f5310d7ff540 - () https://git.kernel.org/stable/c/9b94f0e42ed248eb31929da84ed9f5310d7ff540 - Patch
References () https://git.kernel.org/stable/c/ae1e1267650638136b84c23f2b31250f0ccb6823 - () https://git.kernel.org/stable/c/ae1e1267650638136b84c23f2b31250f0ccb6823 - Patch
References () https://git.kernel.org/stable/c/bc18551c6169eac5ed813778d3e3e484002dbbe5 - () https://git.kernel.org/stable/c/bc18551c6169eac5ed813778d3e3e484002dbbe5 - Patch
References () https://git.kernel.org/stable/c/c2a445367a496a3c25dbc940c10c8bd1cfd4c14a - () https://git.kernel.org/stable/c/c2a445367a496a3c25dbc940c10c8bd1cfd4c14a - Patch
References () https://git.kernel.org/stable/c/c39f84e4be1be63fc60ca7141ea7b76edcea5907 - () https://git.kernel.org/stable/c/c39f84e4be1be63fc60ca7141ea7b76edcea5907 - Patch
References () https://git.kernel.org/stable/c/cfe770220ac2dbd3e104c6b45094037455da81d4 - () https://git.kernel.org/stable/c/cfe770220ac2dbd3e104c6b45094037455da81d4 - Patch
References () https://git.kernel.org/stable/c/d04800323336eebf441d153f43234eac9b833d36 - () https://git.kernel.org/stable/c/d04800323336eebf441d153f43234eac9b833d36 - Patch

11 May 2026, 08:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 8.2

08 May 2026, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-08 15:16

Updated : 2026-05-21 16:54

NVD link : CVE-2026-43452

Mitre link : CVE-2026-43452

CVE.ORG link : CVE-2026-43452

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo