Use After Free in Linux Kernel
CVE-2019-19807
In the Linux kernel before 5.3.11, sound/core/timer.c has a use-after-free caused by erroneous code refactoring, aka CID-e7af6307a8a5. This is related to snd_timer_open and snd_timer_close_locked. The timeri variable was originally intended to be for a newly created timer instance, but was used for a different purpose after refactoring.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.2% 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
- Linux Kernel
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11 (Release Notes, Vendor Advisory)
- github.com/torvalds/linux/commit/e7af6307a8a54f0b873960b32b6a644f2d0fbd97 (Patch, Third Party Advisory)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Exploit, Patch, Vendor Advisory)
- security.netapp.com/advisory/ntap-20200103-0001/ (Third Party Advisory)
- usn.ubuntu.com/4227-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4225-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4227-2/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-19807?
- CVE-2019-19807 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2019-12-15.
- How severe is CVE-2019-19807?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2019-19807 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.