7.8

CVE-2025-39800: btrfs: abort transaction on unexpected eb generation at btrfs_copy_root()

Modified
AliasesUBUNTU-CVE-2025-39800DEBIAN-CVE-2025-39800
Published 15-09-2025Last modified 05-08-2026

Vulnerability summary

CVE-2025-39800 is a high (CVSS 7.8) vulnerability in debian debian_linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 4.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.16%
0%100%
Low · 0.00 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 35 · Related 32
DLA-4328-1DSA-6008-1DSA-6009-1OPENSUSE-SU-2025:20081-1SUSE-SU-2025:03600-1SUSE-SU-2025:03614-1

Timeline

  1. 15-09-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: abort transaction on unexpected eb generation at btrfs_copy_root() If we find an unexpected generation for the extent buffer we are cloning at btrfs_copy_root(), we just WARN_ON() and don't error out and abort the transaction, meaning we allow to persist metadata with an unexpected generation. Instead of warning only, abort the transaction and return -EUCLEAN.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.15% 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: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu149 products
  • linuxAll versions (No fix recorded) | < 6.8.0-100.100
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1046.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.153-1 | < 6.12.48-1 | < 6.16.5-1
  • debian_linuxEOL11.0
Linux2 products
  • linux≥ be20aa9dbadc8c06283784ee12bbc0d97dea3418, < 4290e34fb87ae556b12c216efd0ae91583446b7a | ≥ be20aa9dbadc8c06283784ee12bbc0d97dea3418, < 4734255ef39b416864139dcda96a387fe5f33a6a | ≥ be20aa9dbadc8c06283784ee12bbc0d97dea3418, < da2124719f386b6e5d4d4b1a2e67c440e4d5892f | ≥ be20aa9dbadc8c06283784ee12bbc0d97dea3418, < f4f5bd9251a4cbe55aaa05725c6c3c32ad1f74b3 | ≥ be20aa9dbadc8c06283784ee12bbc0d97dea3418, < 33e8f24b52d2796b8cfb28c19a1a7dd6476323a8 | 2.6.29
  • linux_kernel≥ 2.6.29, < 6.1.149 | ≥ 6.2, < 6.6.103 | ≥ 6.7, < 6.12.44 | ≥ 6.13, < 6.16.4

3 vendors · 153 products

References

27 links
Show all 27 references