fs/jfs: Add check for negative db_l2nbperpage
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 7.8epss 0.3%
probabilidad de explotación
0.3%top 82% de las CVE
explotación observada
noninguna fuente lo reporta
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
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Productos afectados
Linux · LinuxReferencias
https://git.kernel.org/stable/c/0cb567e727339a192f9fd0db00781d73a91d15a6https://git.kernel.org/stable/c/1a7c53fdea1d189087544d9a606d249e93c4934bhttps://git.kernel.org/stable/c/491085258185ffc4fb91555b0dba895fe7656a45https://git.kernel.org/stable/c/524b4f203afcf87accfe387e846f33f916f0c907https://git.kernel.org/stable/c/525b861a008143048535011f3816d407940f4bfahttps://git.kernel.org/stable/c/5f148b16972e5f4592629b244d5109b15135f53fhttps://git.kernel.org/stable/c/8f2964df6bfce9d92d81ca552010b8677af8d9dchttps://git.kernel.org/stable/c/a81a56b4cbe3142cc99f6b98e8f9b3a631c768e1https://git.kernel.org/stable/c/cc61fcf7d1c99f148fe8ddfb5c6ed0bb75861f01