CVE-2026-98559Medium· 4.7▾ SunlitA flaw was found in the Linux kernel's Shared Memory Communications (SMC) subsystem. When processing port errors, the kernel traverses active link groups without holding the appropriate lock, allowing a concurrent termination event to free…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 25.9 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 20.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
Last analysed / modified upstream
0.2%
— → 4.7
none → medium
0.2% → 0.2%
A flaw was found in the Linux kernel's Shared Memory Communications (SMC) subsystem. When processing port errors, the kernel traverses active link groups without holding the appropriate lock, allowing a concurrent termination event to free memory while it is still in use. An attacker capable of inducing these concurrent network events could exploit this race condition to trigger a use-after-free flaw, leading to a Denial of Service (DoS) via a system crash.
kernel: net/smc: fix UAF on lgr list traversal in smcr_port_err() — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.
Affected:
No fix planned:
Not affected:
Fix deferred
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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