jfs: Fix shift-out-of-bounds in dbDiscardAG
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 88% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
jfs: Fix shift-out-of-bounds in dbDiscardAG
When searching for the next smaller log2 block, BLKSTOL2() returned 0,
causing shift exponent -1 to be negative.
This patch fixes the issue by exiting the loop directly when negative
shift is found.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/234e6ea0855cdb5673d54ecaf7dc5c78f3e84630https://git.kernel.org/stable/c/4de2c04c3acd5b84f50b0d2f8f09e9b2f42374b9https://git.kernel.org/stable/c/7063b80268e2593e58bee8a8d709c2f3ff93e2f2https://git.kernel.org/stable/c/bb7c605a754823b86dd74f6537ccb9d38a9dec5ahttps://git.kernel.org/stable/c/bd04a149e3a29e7f71b7956ed41dba34e42d539ehttps://git.kernel.org/stable/c/f650148b43949ca9e37e820804bb6026fff404f3https://lists.debian.org/debian-lts-announce/2025/01/msg00001.htmlhttps://lists.debian.org/debian-lts-announce/2025/05/msg00030.html