CVE-2018-1093

Description

The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers.

References

http://openwall.com/lists/oss-security/2018/03/29/1

https://bugzilla.kernel.org/show_bug.cgi?id=199181

https://bugzilla.redhat.com/show_bug.cgi?id=1560782

https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=7dac4a1726a9c64a517d595c40e95e2d0d135f6f

https://lists.debian.org/debian-lts-announce/2018/06/msg00000.html

https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html

https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html

https://usn.ubuntu.com/3676-1/

https://usn.ubuntu.com/3676-2/

https://usn.ubuntu.com/3752-1/

https://usn.ubuntu.com/3752-2/

https://usn.ubuntu.com/3752-3/

https://usn.ubuntu.com/3754-1/

https://www.debian.org/security/2018/dsa-4188

Details

Risk Information

CVSS v2

CVSS v3