CVE-2026-89578Medium· 5.5▾ SunlitA flaw was found in the Linux kernel's device mapper I/O (dm-io) component. When handling DM_IO_BIO requests, incorrect sector-based accounting for misaligned direct I/O buffers could lead to an infinite loop. This issue can cause I/O oper…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
— → 4.1
none → medium
— → 4.1
none → medium
— → 4.1
none → medium
Last analysed / modified upstream
4.1 → 5.5
A flaw was found in the Linux kernel's device mapper I/O (dm-io) component. When handling DM_IO_BIO requests, incorrect sector-based accounting for misaligned direct I/O buffers could lead to an infinite loop. This issue can cause I/O operations to hang indefinitely, resulting in a denial of service (DoS) for the affected system. A local attacker could exploit this by performing specific misaligned direct I/O operations to a dm-mirror device.
kernel: dm-io: clone the source bio instead of copying its biovec — rated Low by Red Hat. Released 2026-09-11, updated 2026-09-18.
Affected:
No fix planned:
Not affected:
Out of support scope
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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