CVE-2026-43244
kernel: kcm: fix zero-frag skb in frag_list on partial sendmsg error
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Severity
UnknownRed Hat Product Security
CVSS
Review impact separately from score.
Published · May 6, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel's Kernel Connection Multiplexer (KCM) module. A local user could trigger an issue where, during partial sendmsg operations, an empty network buffer (skb) is incorrectly left in the frag_list. A subsequent zero-length write operation can then cause a kernel warning, potentially leading to a denial of service (DoS) by causing system instability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CWE-390 · Detection of Error Condition Without Action