NULL Pointer Dereference Affecting linux-4.9 package, versions <4.9.110-3+deb9u5~deb8u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published27 Jul 2018
- disclosed27 Jul 2018
Introduced: 27 Jul 2018
CVE-2018-14609 (opens in a new tab)How to fix?
Upgrade Debian:8 linux-4.9 to version 4.9.110-3+deb9u5~deb8u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-4.9 package and not the linux-4.9 package as distributed by Debian.
See How to fix? for Debian:8 relevant fixed versions and status.
An issue was discovered in the Linux kernel through 4.17.10. There is an invalid pointer dereference in __del_reloc_root() in fs/btrfs/relocation.c when mounting a crafted btrfs image, related to removing reloc rb_trees when reloc control has not been initialized.
References
- https://security-tracker.debian.org/tracker/CVE-2018-14609
- https://www.debian.org/security/2018/dsa-4308
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html
- https://bugzilla.kernel.org/show_bug.cgi?id=199833
- https://patchwork.kernel.org/patch/10500521/
- http://www.securityfocus.com/bid/104917
- https://usn.ubuntu.com/4118-1/
- https://usn.ubuntu.com/3821-1/
- https://usn.ubuntu.com/3821-2/
- https://usn.ubuntu.com/4094-1/