SB2026050916 - Improper resource shutdown or release in Linux kernel ncsi
Published: May 9, 2026
Security Bulletin ID
SB2026050916
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper resource shutdown or release (CVE-ID: CVE-2026-43373)
CWE-ID: CWE-404 - Improper Resource Shutdown or Release
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper resource shutdown or release in NCSI RX and AEN handlers when processing invalid AEN packets or unresolved NCSI responses. A remote attacker can send specially crafted network packets to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/553366c271479c0d571dd1bb5d1bcde4747fb82e
- https://git.kernel.org/stable/c/59962588197863d0d746879f193905c0c6b3df49
- https://git.kernel.org/stable/c/5c3398a54266541610c8d0a7082e654e9ff3e259
- https://git.kernel.org/stable/c/81d6aee32f8f7bbc175c05dbf61f4430bfb88c4a
- https://git.kernel.org/stable/c/87138dde2d6937b12b967f28fe598a7d59000ae4
- https://git.kernel.org/stable/c/9891d7f4f1ede473c54b49776ae07755083eef06
- https://git.kernel.org/stable/c/b70c4e5e711931cdd56e6e905737b72f1e649189
- https://git.kernel.org/stable/c/fef5aa6e3bcf3c8053307642663a63b7362d7552