VulnerabilityModified
CVE-2018-1093
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…
MEDIUM 5.5EPSS 1.93%
Does this matter?
Lower severity and a low EPSS score (1.93%). Track it; it rarely justifies an emergency change on its own.
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 3.0
- 5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 1.93% probability · 79th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- linux/linux kernel
- Source
- secalert@redhat.com
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 Tracking, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=7dac4a1726a9c64a517d595c40e95e2d0d135f6fPatch
- 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
- https://bugzilla.kernel.org/show_bug.cgi?id=199181Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=1560782Issue Tracking, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=7dac4a1726a9c64a517d595c40e95e2d0d135f6fPatch
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.