CVE-2023-53372

sctp: fix a potential overflow in sctp_ifwdtsn_skip

State: Published
Severity: 8.2 High
Published: Sep 18, 2025
Updated: Aug 5, 2026
Reserved: Sep 17, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

sctp: fix a potential overflow in sctp_ifwdtsn_skip

Currently, when traversing ifwdtsn skips with _sctp_walk_ifwdtsn, it only checks the pos against the end of the chunk. However, the data left for the last pos may be < sizeof(struct sctp_ifwdtsn_skip), and dereference it as struct sctp_ifwdtsn_skip may cause coverflow.

This patch fixes it by checking the pos against "the end of the chunk - sizeof(struct sctp_ifwdtsn_skip)" in sctp_ifwdtsn_skip, similar to sctp_fwdtsn_skip.

Scores

CVSS	Score	Vector	Source
3.1	8.2 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H	Linux
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
LinuxLinux	0fc2ea922c8ad5520c80f03facbf396c81dce802 to before 4fbd094d4131a10d06a45d64158567052a35b3f4Affected 0fc2ea922c8ad5520c80f03facbf396c81dce802 to before ad831a7079c99c01e801764b53bc9997c2e9c0f7Affected 0fc2ea922c8ad5520c80f03facbf396c81dce802 to before 79b28f42214a3d0d6a8c514db3602260bd5d6cb5Affected 0fc2ea922c8ad5520c80f03facbf396c81dce802 to before 6109f5b13ce3e3e537db6f18976ec0e9118d1c6fAffected 0fc2ea922c8ad5520c80f03facbf396c81dce802 to before 5c9367ac5a22d71841bcd00130f9146c9b227d57Affected 0fc2ea922c8ad5520c80f03facbf396c81dce802 to before ad988e9b5ff04607e624a459209e8c2d0c15fc73Affected 0fc2ea922c8ad5520c80f03facbf396c81dce802 to before 32832a2caf82663870126c5186cf8f86c8b2a649Affected
LinuxLinux	4.16Affected before 4.16Not affected 4.19.281 through 4.19.Not affected 5.4.241 through 5.4.Not affected 5.10.178 through 5.10.Not affected 5.15.108 through 5.15.Not affected 6.1.25 through 6.1.Not affected 6.2.12 through 6.2.Not affected 6.3 and laterNot affected

Product

Versions

LinuxLinux

0fc2ea922c8ad5520c80f03facbf396c81dce802 to before 4fbd094d4131a10d06a45d64158567052a35b3f4Affected
0fc2ea922c8ad5520c80f03facbf396c81dce802 to before ad831a7079c99c01e801764b53bc9997c2e9c0f7Affected
0fc2ea922c8ad5520c80f03facbf396c81dce802 to before 79b28f42214a3d0d6a8c514db3602260bd5d6cb5Affected
0fc2ea922c8ad5520c80f03facbf396c81dce802 to before 6109f5b13ce3e3e537db6f18976ec0e9118d1c6fAffected
0fc2ea922c8ad5520c80f03facbf396c81dce802 to before 5c9367ac5a22d71841bcd00130f9146c9b227d57Affected
0fc2ea922c8ad5520c80f03facbf396c81dce802 to before ad988e9b5ff04607e624a459209e8c2d0c15fc73Affected
0fc2ea922c8ad5520c80f03facbf396c81dce802 to before 32832a2caf82663870126c5186cf8f86c8b2a649Affected

LinuxLinux

4.16Affected
before 4.16Not affected
4.19.281 through 4.19.*Not affected
5.4.241 through 5.4.*Not affected
5.10.178 through 5.10.*Not affected
5.15.108 through 5.15.*Not affected
6.1.25 through 6.1.*Not affected
6.2.12 through 6.2.*Not affected
6.3 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.