HIGH

CVE-2026-98258

CVSS v3

7.8

HIGH

EPSS Score

0.2 %

exploit probability, as of 2026-10-06

CISA KEV

known exploited

Exploitation

—

SSVC status

Description

In the Linux kernel, the following vulnerability has been resolved: posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list Kijo analyzed another race in the POSIX CPU timer code: Commit bf635681c906 converted cpu_timer::firing from a tristate value to a boolean. This lost the distinction between "not owned by the firing list" and "still owned, but delivery was canceled". The resulting race is: expiry handler timer_settime() timer_delete() ---

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2026-10-06
Last Modified: 2026-10-07

Frequently asked questions

What is CVE-2026-98258?

Is CVE-2026-98258 actively exploited?

Active exploitation of CVE-2026-98258 has not been confirmed. Its EPSS score was 0.2% on 2026-10-06, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-98258?

CVE-2026-98258 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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