CVE-2023-52810

moderate-risk

Published 2024-05-21

In the Linux kernel, the following vulnerability has been resolved: fs/jfs: Add check for negative db_l2nbperpage l2nbperpage is log2(number of blks per page), and the minimum legal value should be 0, not negative. In the case of l2nbperpage being negative, an error will occur when subsequently used as shift exponent. Syzbot reported this bug: UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:799:12 shift exponent -16777216 is negative

Do I need to act?

0.02% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 8.4/10 High

LOCAL / LOW complexity

Affected Products (1)

Linux Kernel

Affected Vendors

Linux

References (18)

Patch https://git.kernel.org/stable/c/0cb567e727339a192f9fd0db00781d73a91d15a6

Patch https://git.kernel.org/stable/c/1a7c53fdea1d189087544d9a606d249e93c4934b

Patch https://git.kernel.org/stable/c/491085258185ffc4fb91555b0dba895fe7656a45

Patch https://git.kernel.org/stable/c/524b4f203afcf87accfe387e846f33f916f0c907

Patch https://git.kernel.org/stable/c/525b861a008143048535011f3816d407940f4bfa

Patch https://git.kernel.org/stable/c/5f148b16972e5f4592629b244d5109b15135f53f

Patch https://git.kernel.org/stable/c/8f2964df6bfce9d92d81ca552010b8677af8d9dc

Patch https://git.kernel.org/stable/c/a81a56b4cbe3142cc99f6b98e8f9b3a631c768e1

Patch https://git.kernel.org/stable/c/cc61fcf7d1c99f148fe8ddfb5c6ed0bb75861f01