VulnerabilityModified
CVE-2018-13093
There is a NULL pointer dereference and panic in lookup_slow() on a NULL inode->i_ops pointer when doing pathwalks on a corrupted xfs image.
MEDIUM 5.5EPSS 1.73%
Does this matter?
Lower severity and a low EPSS score (1.73%). Track it; it rarely justifies an emergency change on its own.
Description
An issue was discovered in fs/xfs/xfs_icache.c in the Linux kernel through 4.17.3. There is a NULL pointer dereference and panic in lookup_slow() on a NULL inode->i_ops pointer when doing pathwalks on a corrupted xfs image. This occurs because of a lack of proper validation that cached inodes are free during allocation.
- 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
- 1.73% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
References
- https://access.redhat.com/errata/RHSA-2019:2029
- https://access.redhat.com/errata/RHSA-2019:2043
- https://bugzilla.kernel.org/show_bug.cgi?id=199367Issue Tracking, Third Party Advisory
- https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git/commit/?h=for-next&id=afca6c5b2595fc44383919fba740c194b0b76affPatch, Third Party Advisory
- https://github.com/torvalds/linux/commit/afca6c5b2595fc44383919fba740c194b0b76affPatch
- https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
- https://usn.ubuntu.com/4094-1/
- https://usn.ubuntu.com/4118-1/
- https://access.redhat.com/errata/RHSA-2019:2029
- https://access.redhat.com/errata/RHSA-2019:2043
- https://bugzilla.kernel.org/show_bug.cgi?id=199367Issue Tracking, Third Party Advisory
- https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git/commit/?h=for-next&id=afca6c5b2595fc44383919fba740c194b0b76affPatch, Third Party Advisory
- https://github.com/torvalds/linux/commit/afca6c5b2595fc44383919fba740c194b0b76affPatch
- https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
- https://usn.ubuntu.com/4094-1/
- https://usn.ubuntu.com/4118-1/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.