CVE-2025-68376: coresight: ETR: Fix ETR buffer use-after-free issue

Deferred
AliasesUBUNTU-CVE-2025-68376DEBIAN-CVE-2025-68376
Published 24-12-2025Last modified 21-10-2026

Vulnerability summary

CVE-2025-68376 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.8% of scored vulnerabilities.

Priority
Insufficient evidence

No CVSS vector published; no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.21%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 13 · Related 13
OPENSUSE-SU-2026:10039-1OPENSUSE-SU-2026:10301-1OPENSUSE-SU-2026:20287-1SUSE-SU-2026:20555-1SUSE-SU-2026:20570-1SUSE-SU-2026:20599-1

Timeline

  1. 24-12-2025
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: coresight: ETR: Fix ETR buffer use-after-free issue When ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed and enabled again, currently sysfs_buf will point to the newly allocated memory(buf_new) and free the old memory(buf_old). But the etr_buf that is being used by the ETR remains pointed to buf_old, not updated to buf_new. In this case, it will result in a memory use-after-free issue. Fix this by checking ETR's mode before updating and releasing buf_old, if the mode is CS_MODE_SYSFS, then skip updating and releasing it.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 0.19% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: not stated in public data.

Ubuntu132 products
  • linuxAll versions (No fix recorded) | < 6.17.0-19.19
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.17.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.115-2 | < 6.17.13-1
Linux1 product
  • linux≥ bd2767ec3df2775bc336f441f9068a989ccb919d, < 5d5d130835b417c7bfd6c942f0149e34397d4463 | ≥ bd2767ec3df2775bc336f441f9068a989ccb919d, < 4e83434247ff8005a0b9a1ee997864abf8f259ec | ≥ bd2767ec3df2775bc336f441f9068a989ccb919d, < 70acbc9c77686b7a521af6d7a543dcd9c324cf07 | ≥ bd2767ec3df2775bc336f441f9068a989ccb919d, < cda077a19f5c8d6ec61e5b97deca203d95e3a422 | ≥ bd2767ec3df2775bc336f441f9068a989ccb919d, < 35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3 | fdd3ceb0001da6768bede9779a0190a42e65c404 | ≥ 6.5.8, < 6.6 | 6.6

3 vendors · 134 products

References

14 links
Show all 14 references