# CVE-2026-23106: linux: In the Linux kernel, the following vulnerability has been resolved:  timekeeping: Adjust the leap state for the corre...

CVE-2026-23106 is fixed in linux on 1 platform by DEBIAN-CVE-2026-23106 (version 6.18.8-1), released February 4, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-23106
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0012
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 4, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  timekeeping: Adjust the leap state for the correct auxiliary timekeeper  When __do_ajdtimex() was introduced to handle adjtimex for any timekeeper, this reference to tk_core was not updated. When called on an auxiliary timekeeper, the core timekeeper would be updated incorrectly.  This gets caught by the lock debugging diagnostics because the timekeepers sequence lock gets written to without holding its associated spinlock:  WARNING: include/linux/seqlock.h:226 at __do_adjtimex+0x394/0x3b0, CPU#2: test/125 aux_clock_adj (kernel/time/timekeeping.c:2979) __do_sys_clock_adjtime (kernel/time/posix-timers.c:1161 kernel/time/posix-timers.c:1173) do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1)) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:131)  Update the correct auxiliary timekeeper.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.18.8-1 | [DEBIAN-CVE-2026-23106](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23106.md) | Feb 4, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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