Use After Free in Linux Kernel
CVE-2019-19813
In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in __mutex_lock in kernel/locking/mutex.c. This is related to mutex_can_spin_on_owner in kernel/locking/mutex.c, __btrfs_qgroup_free_meta in fs/btrfs/qgroup.c, and btrfs_insert_delayed_items in fs/btrfs/delayed-inode.c.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.021 (82.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/bobfuzzer/CVE/tree/master/CVE-2019-19813 (Exploit, Third Party Advisory)
- security.netapp.com/advisory/ntap-20200103-0001/ (Third Party Advisory)
- usn.ubuntu.com/4414-1/ (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/09/msg00025.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/03/msg00010.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-19813?
- CVE-2019-19813 is a medium-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 5.5/10. Published 2019-12-17.
- How severe is CVE-2019-19813?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2019-19813 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.