Use After Free in Linux Kernel
CVE-2019-19318
In the Linux kernel 5.3.11, mounting a crafted btrfs image twice can cause an rwsem_down_write_slowpath use-after-free because (in rwsem_can_spin_on_owner in kernel/locking/rwsem.c) rwsem_owner_flags returns an already freed pointer,
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (50.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/bobfuzzer/CVE/tree/master/CVE-2019-19318 (Exploit, Third Party Advisory)
- security.netapp.com/advisory/ntap-20200103-0001/ (Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html (vendor-advisory, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4414-1/ (vendor-advisory, 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-2019-19318?
- CVE-2019-19318 is a medium-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 4.4/10. Published 2019-11-28.
- How severe is CVE-2019-19318?
- Medium severity. CVSS v3 base score is 4.4 out of 10.