CVE-2023-53450

ext4: remove a BUG_ON in ext4_mb_release_group_pa()

Published: 10/1/2025 Last updated: 1/5/2026 Reserved: 9/17/2025

In the Linux kernel, the following vulnerability has been resolved: ext4: remove a BUG_ON in ext4_mb_release_group_pa() If a malicious fuzzer overwrites the ext4 superblock while it is mounted such that the s_first_data_block is set to a very large number, the calculation of the block group can underflow, and trigger a BUG_ON check. Change this to be an ext4_warning so that we don't crash the kernel.

CNA assigner: Linux (416baaa9-dc9f-4396-8d5f-8c081fb06d67) Requested by: n/a

Opam packages affected (28)

albatross cdrom conf-bpftool conf-libbpf conf-linux-libc-dev core core_unix hvsock mirage-block-unix mm ocaml-probes orun rawlink rawlink-eio rawlink-lwt restricted shell solo5 solo5-bindings-hvt solo5-bindings-spt solo5-cross-aarch64 solo5-kernel-ukvm tracy-client tuntap uring vhd-format vhd-format-lwt xapi-stdext-unix

Products affected (4)

Product	Vendor	Version
Linux	Linux	<= 22.001.20085
Linux	Linux	3.4_DP8
Linux	Linux	< 89
Linux	Linux	Snapdragon 750G 5G Mobile Platform

CVE-2023-53450

ext4: remove a BUG_ON in ext4_mb_release_group_pa()

Opam packages affected (28)

Products affected (4)

References (18)