5.5

CVE-2024-44963: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2024-44963DEBIAN-CVE-2024-44963
Published 04-09-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2024-44963 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.24%
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 17 · Related 17
SUSE-SU-2025:02846-1SUSE-SU-2025:02853-1SUSE-SU-2025:02923-1SUSE-SU-2025:02969-1SUSE-SU-2025:02996-1SUSE-SU-2025:02997-1

Timeline

  1. 04-09-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: do not BUG_ON() when freeing tree block after error When freeing a tree block, at btrfs_free_tree_block(), if we fail to create a delayed reference we don't deal with the error and just do a BUG_ON(). The error most likely to happen is -ENOMEM, and we have a comment mentioning that only -ENOMEM can happen, but that is not true, because in case qgroups are enabled any error returned from btrfs_qgroup_trace_extent_post() (can be -EUCLEAN or anything returned from btrfs_search_slot() for example) can be propagated back to btrfs_free_tree_block(). So stop doing a BUG_ON() and return the error to the callers and make them abort the transaction to prevent leaking space. Syzbot was triggering this, likely due to memory allocation failure injection.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

0.00 pp

From 0.24% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.24%

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

Ubuntu129 products
  • linuxAll versions (No fix recorded) | < 6.8.0-50.51
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1020.22
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ fb235dc06fac9eaa4408ade9c8b20d45d63c89b7, < 22d907bcd283d69d5e60497fc0d51969545c583b | ≥ fb235dc06fac9eaa4408ade9c8b20d45d63c89b7, < 98251cd60b4d702a8a81de442ab621e83a3fb24f | ≥ fb235dc06fac9eaa4408ade9c8b20d45d63c89b7, < bb3868033a4cccff7be57e9145f2117cbdc91c11 | 4.11
  • linux_kernel< 6.10.5
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.10.6-1

3 vendors · 132 products

References

13 links
Show all 13 references