CVE-2026-23168 Affecting kernel-uek-doc package, versions <0:6.12.0-200.74.27.el9uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.01% (4th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ORACLE9-KERNELUEKDOC-15866368
  • published1 Apr 2026
  • disclosed14 Feb 2026

Introduced: 14 Feb 2026

CVE-2026-23168  (opens in a new tab)

How to fix?

Upgrade Oracle:9 kernel-uek-doc to version 0:6.12.0-200.74.27.el9uek or higher.
This issue was patched in ELSA-2026-50160.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-doc package and not the kernel-uek-doc package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

flex_proportions: make fprop_new_period() hardirq safe

Bernd has reported a lockdep splat from flexible proportions code that is essentially complaining about the following race:

<timer fires> run_timer_softirq - we are in softirq context call_timer_fn writeout_period fprop_new_period write_seqcount_begin(&p->sequence);

    &lt;hardirq is raised&gt;
    ...
    blk_mq_end_request()
  blk_update_request()
    ext4_end_bio()
      folio_end_writeback()
    __wb_writeout_add()
      __fprop_add_percpu_max()
        if (unlikely(max_frac &lt; FPROP_FRAC_BASE)) {
          fprop_fraction_percpu()
        seq = read_seqcount_begin(&amp;p-&gt;sequence);
          - sees odd sequence so loops indefinitely

Note that a deadlock like this is only possible if the bdi has configured maximum fraction of writeout throughput which is very rare in general but frequent for example for FUSE bdis. To fix this problem we have to make sure write section of the sequence counter is irqsafe.

CVSS Base Scores

version 3.1