title: fbdev: savage: Error out if pixclock equals zero
description: In the Linux kernel, the following vulnerability has been resolved:
fbdev: savage: Error out if pixclock equals zero
The userspace program could pass any values to the driver through
ioctl() interface. If the driver doesn't check the value of pixclock,
it may cause divide-by-zero error.
Although pixclock is checked in savagefb_decode_var(), but it is not
checked properly in savagefb_probe(). Fix this by checking whether
pixclock is zero in the function savagefb_check_var() before
info->var.pixclock is used as the divisor.
This is similar to CVE-2022-3061 in i740fb which was fixed by
commit 15cf0b8.
affected:
{
product: Linux
vendor: Linux
defaultStatus: unaffected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions:
version: 1da177e4c3f4, lessThan: 224453de8505, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: 84dce0f6a4cc, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: 512ee6d6041e, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: 8c54acf33e5a, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: 070398d32c5f, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: bc3c2e58d73b, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: a9ca4e80d234, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: 04e5eac8f3ab, status: affected, versionType: git
}
{
product: Linux
vendor: Linux
defaultStatus: affected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions:
version: 4.19.308, lessThanOrEqual: 4.19.*, status: unaffected, versionType: custom
version: 5.4.270, lessThanOrEqual: 5.4.*, status: unaffected, versionType: custom
version: 5.10.211, lessThanOrEqual: 5.10.*, status: unaffected, versionType: custom
version: 5.15.150, lessThanOrEqual: 5.15.*, status: unaffected, versionType: custom
version: 6.1.80, lessThanOrEqual: 6.1.*, status: unaffected, versionType: custom
version: 6.6.19, lessThanOrEqual: 6.6.*, status: unaffected, versionType: custom
version: 6.7.7, lessThanOrEqual: 6.7.*, status: unaffected, versionType: custom
version: 6.8, lessThanOrEqual: *, status: unaffected, versionType: original_commit_for_fix
}
