null_blk: fix validation of block size
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:
null_blk: fix validation of block size
Block size should be between 512 and PAGE_SIZE and be a power of 2. The current
check does not validate this, so update the check.
Without this patch, null_blk would Oops due to a null pointer deref when
loaded with bs=1536 [1].
[axboe: remove unnecessary braces and != 0 check]
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/08f03186b96e25e3154916a2e70732557c770ea7https://git.kernel.org/stable/c/2772ed2fc075eef7df3789906fc9dae01e4e132ehttps://git.kernel.org/stable/c/9625afe1dd4a158a14bb50f81af9e2dac634c0b1https://git.kernel.org/stable/c/9b873bdaae64bddade9d8c6df23c8a31948d47d0https://git.kernel.org/stable/c/c462ecd659b5fce731f1d592285832fd6ad54053https://git.kernel.org/stable/c/f92409a9da02f27d05d713bff5f865e386cef9b3https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html