GHSA-8gjf-xqc3-q68r
GitHub Security Advisory
⚠ Unreviewed
HIGH
Has CVE
Advisory Details
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
Related CVEs
Key Information
7.5
/10
Dataset
Last updated: June 12, 2025 6:24 AM
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