CVE-2026-89458Low· 2.5▾ SunlitA flaw was found in the Linux kernel's s390/dasd component. The `dasd_int_handler()` function incorrectly marks failed Extended Sense Data (ESE) read operations as successful when processing unallocated ESE tracks. This leads to the block …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 13.8 · 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%
— → 4.7
none → medium
— → 4.7
none → medium
— → 7
none → high
0.2% → 0.2%
Last analysed / modified upstream
7 → 2.5
high → low
A flaw was found in the Linux kernel's s390/dasd component. The dasd_int_handler() function incorrectly marks failed Extended Sense Data (ESE) read operations as successful when processing unallocated ESE tracks. This leads to the block layer receiving stale or uninitialized memory instead of properly zeroed memory. A local attacker could exploit this vulnerability to potentially gain access to sensitive information, resulting in information disclosure.
kernel: s390/dasd: Do not complete a failed ESE read as successful — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-10-24.
Affected:
No fix planned:
Not affected:
Fix deferred
Workarounds / mitigations:
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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