CVE-2024-35935: btrfs: send: handle path ref underflow in header iterate_inode_ref()

Severity: low (CVSS 3.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-19 · updated 2026-10-15
Weakness: CWE-209

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: send: handle path ref underflow in header iterate_inode_ref() Change BUG_ON to proper error handling if building the path buffer fails. The pointers are not printed so we don't accidentally leak kernel addresses.

Affected products

Debian Linux: 10.0
Linux kernel: before 4.19.312; from 4.20 before 5.4.274; from 5.5 before 5.10.215; from 5.11 before 5.15.155; from 5.16 before 6.1.86; from 6.2 before 6.6.27 — fixed in 4.19.312, 5.10.215, 5.15.155, 5.4.274, 6.1.86, 6.6.27

How to fix

Upgrade to a fixed version: Linux kernel 4.19.312, 5.10.215, 5.15.155, 5.4.274. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-35935 or the next vulnerability affects your stack