CVE-2026-43373

net: ncsi: fix skb leak in error paths

State: Published
Severity: 7.5 High
Published: May 8, 2026
Updated: Aug 5, 2026
Reserved: May 1, 2026

Description

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

net: ncsi: fix skb leak in error paths

Early return paths in NCSI RX and AEN handlers fail to release the received skb, resulting in a memory leak.

Specifically, ncsi_aen_handler() returns on invalid AEN packets without consuming the skb. Similarly, ncsi_rcv_rsp() exits early when failing to resolve the NCSI device, response handler, or request, leaving the skb unfreed.

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

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	138635cc27c9737f940c3aa80912ff7a61c825af to before 9891d7f4f1ede473c54b49776ae07755083eef06Affected 138635cc27c9737f940c3aa80912ff7a61c825af to before fef5aa6e3bcf3c8053307642663a63b7362d7552Affected 138635cc27c9737f940c3aa80912ff7a61c825af to before 81d6aee32f8f7bbc175c05dbf61f4430bfb88c4aAffected 138635cc27c9737f940c3aa80912ff7a61c825af to before 59962588197863d0d746879f193905c0c6b3df49Affected 138635cc27c9737f940c3aa80912ff7a61c825af to before 553366c271479c0d571dd1bb5d1bcde4747fb82eAffected 138635cc27c9737f940c3aa80912ff7a61c825af to before b70c4e5e711931cdd56e6e905737b72f1e649189Affected 138635cc27c9737f940c3aa80912ff7a61c825af to before 87138dde2d6937b12b967f28fe598a7d59000ae4Affected 138635cc27c9737f940c3aa80912ff7a61c825af to before 5c3398a54266541610c8d0a7082e654e9ff3e259Affected
LinuxLinux	4.8Affected before 4.8Not affected 5.10.253 through 5.10.Not affected 5.15.203 through 5.15.Not affected 6.1.167 through 6.1.Not affected 6.6.130 through 6.6.Not affected 6.12.78 through 6.12.Not affected 6.18.19 through 6.18.Not affected 6.19.9 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

138635cc27c9737f940c3aa80912ff7a61c825af to before 9891d7f4f1ede473c54b49776ae07755083eef06Affected
138635cc27c9737f940c3aa80912ff7a61c825af to before fef5aa6e3bcf3c8053307642663a63b7362d7552Affected
138635cc27c9737f940c3aa80912ff7a61c825af to before 81d6aee32f8f7bbc175c05dbf61f4430bfb88c4aAffected
138635cc27c9737f940c3aa80912ff7a61c825af to before 59962588197863d0d746879f193905c0c6b3df49Affected
138635cc27c9737f940c3aa80912ff7a61c825af to before 553366c271479c0d571dd1bb5d1bcde4747fb82eAffected
138635cc27c9737f940c3aa80912ff7a61c825af to before b70c4e5e711931cdd56e6e905737b72f1e649189Affected
138635cc27c9737f940c3aa80912ff7a61c825af to before 87138dde2d6937b12b967f28fe598a7d59000ae4Affected
138635cc27c9737f940c3aa80912ff7a61c825af to before 5c3398a54266541610c8d0a7082e654e9ff3e259Affected

LinuxLinux

4.8Affected
before 4.8Not affected
5.10.253 through 5.10.*Not affected
5.15.203 through 5.15.*Not affected
6.1.167 through 6.1.*Not affected
6.6.130 through 6.6.*Not affected
6.12.78 through 6.12.*Not affected
6.18.19 through 6.18.*Not affected
6.19.9 through 6.19.*Not affected
7.0 and laterNot affected

References

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