CVE-2026-98820Medium· 5.5▾ SunlitA flaw was found in the Linux kernel's block multi-queue (blk-mq) subsystem. When cached input/output (I/O) requests originally allocated for passthrough commands are reused for standard read or write operations, scheduler flags are not pr…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · 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
0.2%
Last analysed / modified upstream
— → 5.5
none → medium
A flaw was found in the Linux kernel's block multi-queue (blk-mq) subsystem. When cached input/output (I/O) requests originally allocated for passthrough commands are reused for standard read or write operations, scheduler flags are not properly updated. This failure bypasses required scheduler initialization and cleanup routines, leading to internal resource leaks in certain I/O schedulers like Kyber. A local attacker could exploit this flaw to stall storage queues, resulting in a Denial of Service (DoS).
kernel: blk-mq: set RQF_USE_SCHED when the operation is known — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.
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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