CVE-2026-43393

btrfs: fix chunk map leak in btrfs_map_block() after btrfs_chunk_map_num_copies()

MEDIUM

5.5

CVSS Score

Published: May 8, 2026 at 02:21 PM UTC

Updated: June 17, 2026 at 10:49 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix chunk map leak in btrfs_map_block() after btrfs_chunk_map_num_copies() Fix a chunk map leak in btrfs_map_block(): if we return early with -EINVAL, we're not freeing the chunk map that we've just looked up.

Affected

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

Linux Kernel · Linux

95%

6.12 ≤ v < 6.12.786.12 ≤ v < 6.18.196.12 ≤ v < 6.19.96.12 ≤ v < 7.06.13 ≤ v < 6.18.196.19 ≤ v < 6.19.90ae653fbec2b9fbc72c65a0c99528990bfb2136d6.12 7.0 rc1 7.0 rc2

Vendor states this is fixed in 0e4aaf5a3212b6a469c2489637c29a8e2a5062a5 (fixed)

Vendor states this is fixed in 4f90c5c2698383984102401b1724b0b67da832ab (fixed)

Vendor states this is fixed in 7bdf00ed75c477252578068dba19934cd825f20a (fixed)

Vendor states this is fixed in f15fb3d41543244d1179f423da4a4832a55bc050 (fixed)

Vendor states this is fixed in 6.12 (unaffected)

Vendor states this is fixed in 6.12.78 (unaffected)

Vendor states this is fixed in 6.18.19 (unaffected)

Vendor states this is fixed in 6.19.9 (unaffected)

Vendor states this is fixed in 7.0 (unaffected)