Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 4.15.15 |
Related Weaknesses (CWE)
References
- http://openwall.com/lists/oss-security/2018/03/29/1Mailing List
- https://bugzilla.kernel.org/show_bug.cgi?id=199181Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=1560782Issue TrackingThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=7dac4aPatch
- 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
- http://openwall.com/lists/oss-security/2018/03/29/1Mailing List
FAQ
What is CVE-2018-1093?
CVE-2018-1093 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 imag...
How severe is CVE-2018-1093?
CVE-2018-1093 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-1093?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.