CVE-2019-19807: canonical ubuntu_linux Use After Free
Vulnerability summary
CVE-2019-19807 is a high (CVSS 7.8) Use After Free vulnerability in canonical ubuntu_linux. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 46.1% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 8 · Related 3Timeline
- 15-12-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.55%
Chance of exploitation in the next 30 days
Percentile
46%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.55% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (git.kernel.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu25 products
- linux< 4.15.0-74.84
- linux-aws< 4.15.0-1057.59
- linux-aws-hwe< 4.15.0-1057.59~16.04.1
- linux-azure< 4.15.0-1066.71~14.04.1 | < 4.15.0-1066.71
- linux-azure-5.3< 5.3.0-1009.10~18.04.1
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 19.10
Debian1 product
- linux< 5.3.15-1
Linux1 product
- linux_kernel≥ 4.9.199, < 4.9.201 | ≥ 4.14.152, < 4.14.154 | ≥ 4.19.82, < 4.19.84 | ≥ 5.2, < 5.3.11
4 vendors · 28 products
References
14 links- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11X Refsource MISCREPORTRelease NotesVendor Advisory
- github.com/torvalds/linux/commit/e7af6307a8a54f0b873960b32b6a644f2d0fbd97X Refsource MISCREPORTPatchThird Party Advisory
