CVE-2023-53815: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2023-53815DEBIAN-CVE-2023-53815
Published 09-12-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2023-53815 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.3% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.19%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 8
SUSE-SU-2026:0278-1SUSE-SU-2026:0281-1SUSE-SU-2026:0293-1SUSE-SU-2026:0315-1SUSE-SU-2026:20477-1SUSE-SU-2026:20498-1

Timeline

  1. 09-12-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: posix-timers: Prevent RT livelock in itimer_delete() itimer_delete() has a retry loop when the timer is concurrently expired. On non-RT kernels this just spin-waits until the timer callback has completed, except for posix CPU timers which have HAVE_POSIX_CPU_TIMERS_TASK_WORK enabled. In that case and on RT kernels the existing task could live lock when preempting the task which does the timer delivery. Replace spin_unlock() with an invocation of timer_wait_running() to handle it the same way as the other retry loops in the posix timer code.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

0.00 pp

From 0.19% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu120 products
  • linuxAll versions (No fix recorded) | < 5.15.0-86.96
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1047.52
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.52-1 | < 6.4.4-1
Linux1 product
  • linux≥ ec8f954a40da8cd3d159713b608e901f0cd909a9, < f1be1ed32daa053484222f7f9beb2b16c624dffd | ≥ ec8f954a40da8cd3d159713b608e901f0cd909a9, < 0670c4c567b27bd8f999a943028f4fe60d1a1106 | ≥ ec8f954a40da8cd3d159713b608e901f0cd909a9, < e7aff15ba29ba4b3052786b1636fa5c4aa39e179 | ≥ ec8f954a40da8cd3d159713b608e901f0cd909a9, < f9bd298e3e4d3fd6e19f017789a42d0f332cd555 | ≥ ec8f954a40da8cd3d159713b608e901f0cd909a9, < c1968bb8a28625cc95d2ad3ca872ab98c9c36d59 | ≥ ec8f954a40da8cd3d159713b608e901f0cd909a9, < 9d9e522010eb5685d8b53e8a24320653d9d4cbbf | 5.4

3 vendors · 122 products

References

10 links