CVE-2025-21788

net: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases

State: Published
Severity: 7.5 High
Published: Feb 27, 2025
Updated: Aug 5, 2026
Reserved: Dec 29, 2024

Description

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

net: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases

If the XDP program doesn't result in XDP_PASS then we leak the memory allocated by am65_cpsw_build_skb().

It is pointless to allocate SKB memory before running the XDP program as we would be wasting CPU cycles for cases other than XDP_PASS. Move the SKB allocation after evaluating the XDP program result.

This fixes the memleak. A performance boost is seen for XDP_DROP test.

XDP_DROP test: Before: 460256 rx/s 0 err/s After: 784130 rx/s 0 err/s

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Linux
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-401 Missing Release of Memory after Effective Lifetime

Affected Products

Product	Versions
LinuxLinux	8acacc40f7337527ff84cd901ed2ef0a2b95b2b6 to before 1bba1d042107167164a0ae3a843fdf650ab005d7Affected 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6 to before dc11f049612b9d926aca2e55f8dc9d82850d0da3Affected 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6 to before 5db843258de1e4e6b1ef1cbd1797923c9e3de548Affected
LinuxLinux	6.10Affected before 6.10Not affected 6.12.16 through 6.12.Not affected 6.13.4 through 6.13.Not affected 6.14 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.