CVE-2026-89765Medium· 5.5▾ SunlitA flaw was found in the Linux kernel's `timers/itimer` component. On native sparc64 systems, the `struct __kernel_old_timeval` contains uninitialized padding bytes. When `put_itimerval()` copies this structure to userspace, these padding b…
▾ 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%
— → 5.3
none → medium
— → 5.3
none → medium
0.2% → 0.2%
— → 5.3
none → medium
Last analysed / modified upstream
5.3 → 5.5
A flaw was found in the Linux kernel's timers/itimer component. On native sparc64 systems, the struct __kernel_old_timeval contains uninitialized padding bytes. When put_itimerval() copies this structure to userspace, these padding bytes can be exposed, leading to information disclosure. This vulnerability allows a local attacker to potentially read sensitive kernel memory.
kernel: timers/itimer: Zero-init old itimerval before copy to userspace — rated Low by Red Hat. Released 2026-09-11, updated 2026-09-21.
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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