CVE-2024-53234

erofs: handle NONHEAD !delta[1] lclusters gracefully

MEDIUM

5.5

CVSS Score

Published: December 27, 2024 at 01:50 PM UTC

Updated: June 17, 2026 at 08:08 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: erofs: handle NONHEAD !delta[1] lclusters gracefully syzbot reported a WARNING in iomap_iter_done: iomap_fiemap+0x73b/0x9b0 fs/iomap/fiemap.c:80 ioctl_fiemap fs/ioctl.c:220 [inline] Generally, NONHEAD lclusters won't have delta[1]==0, except for crafted images and filesystems created by pre-1.0 mkfs versions. Previously, it would immediately bail out if delta[1]==0, which led to inadequate decompressed lengths (thus FIEMAP is impacted). Treat it as delta[1]=1 to work around these legacy mkfs versions. `lclusterbits > 14` is illegal for compact indexes, error out too.

Affected

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

Linux Kernel · Linux

95%

v ≥ 5.10.188v ≥ 5.4.2515.10.188 ≤ v < 5.115.15 ≤ v < 6.1.1275.15 ≤ v < 6.11.115.15 ≤ v < 6.12.25.15 ≤ v < 6.135.15 ≤ v < 6.6.645.4.251 ≤ v < 5.56.12 ≤ v < 6.12.26.2 ≤ v < 6.6.646.7 ≤ v < 6.11.115.10.188 5.15 5.4.2518c723eef989bc419585237daa467b787ddca541596a85becb811ca2ce21a21721f1544d342ae431ed95ae5e25326092d61613acf98280270dde22778

Vendor states this is fixed in 0bc8061ffc733a0a246b8689b2d32a3e9204f43c (fixed)

Vendor states this is fixed in 480c6c7b55aeacac800bc2a0d321ff53273045e5 (fixed)

Vendor states this is fixed in 75a0a6dde803e7a3af700da8da9a361b49f69eba (fixed)

Vendor states this is fixed in daaf68fef4b2ff97928227630021d37b27a96655 (fixed)

Vendor states this is fixed in f466641debcbea8bdf78d1b63a6270aadf9301bf (fixed)

Affected range stops below 5.11, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 5.15 (unaffected)

Affected range stops below 5.5, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 6.1.127 (unaffected)

Vendor states this is fixed in 6.11.11 (unaffected)

Vendor states this is fixed in 6.12.2 (unaffected)

Vendor states this is fixed in 6.13 (unaffected)