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CVE-2024-42314

btrfs: fix extent map use-after-free when adding pages to compressed bio

HIGH
7.8
CVSS Score
Published: August 17, 2024 at 09:09 AM UTC
Updated: August 5, 2026 at 12:04 PM UTC
2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map use-after-free when adding pages to compressed bio At add_ra_bio_pages() we are accessing the extent map to calculate 'add_size' after we dropped our reference on the extent map, resulting in a use-after-free. Fix this by computing 'add_size' before dropping our extent map reference.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
11.0
Linux Kernel· Linux
95%
5.16 ≤ v < 6.1.1085.16 ≤ v < 6.10.35.16 ≤ v < 6.115.16 ≤ v < 6.6.446.2 ≤ v < 6.6.446.7 ≤ v < 6.10.35.166a4049102055250256623ab1875fabd89004bff8
Vendor states this is fixed in 8e7860543a94784d744c7ce34b78a2e11beefa5c (fixed)
Vendor states this is fixed in b7859ff398b6b656e1689daa860eb34837b4bb89 (fixed)
Vendor states this is fixed in c1cc3326e27b0bd7a2806b40bc48e49afaf951e7 (fixed)
Vendor states this is fixed in c205565e0f2f439f278a4a94ee97b67ef7b56ae8 (fixed)
Vendor states this is fixed in 5.16 (unaffected)
Vendor states this is fixed in 6.1.108 (unaffected)
Vendor states this is fixed in 6.10.3 (unaffected)
Vendor states this is fixed in 6.11 (unaffected)
Vendor states this is fixed in 6.6.44 (unaffected)

References (5)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/8e7860543a94784d744c7ce34b78a2e11beefa5c
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/b7859ff398b6b656e1689daa860eb34837b4bb89
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/c1cc3326e27b0bd7a2806b40bc48e49afaf951e7
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/c205565e0f2f439f278a4a94ee97b67ef7b56ae8
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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