What’s Vulnerable › Vulnerabilities

CVE-2019-19807

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-12-15 · updated 2026-06-17
• Weakness: CWE-416

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 19.10
• Linux kernel: from 4.9.199 before 4.9.201; from 4.14.152 before 4.14.154; from 4.19.82 before 4.19.84; from 5.2 before 5.3.11 — fixed in 4.14.154, 4.19.84, 4.9.201, 5.3.11

How to fix

Upgrade to a fixed version: Linux kernel 4.14.154, 4.19.84, 4.9.201, 5.3.11. Check the vendor advisory for mitigations.

References

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e7af6307a8a54f0b873960b32b6a644f2d0fbd97
• https://github.com/torvalds/linux/commit/e7af6307a8a54f0b873960b32b6a644f2d0fbd97
• https://security.netapp.com/advisory/ntap-20200103-0001/
• https://usn.ubuntu.com/4225-1/
• https://usn.ubuntu.com/4227-1/
• https://usn.ubuntu.com/4227-2/
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.11
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e7af6307a8a54f0b873960b32b6a644f2d0fbd97
• https://github.com/torvalds/linux/commit/e7af6307a8a54f0b873960b32b6a644f2d0fbd97
• https://security.netapp.com/advisory/ntap-20200103-0001/
• https://usn.ubuntu.com/4225-1/

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