CVE-2019-20806

Severity: medium (CVSS 4.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-05-27 · updated 2026-06-17
Weakness: CWE-476

Description

An issue was discovered in the Linux kernel before 5.2. There is a NULL pointer dereference in tw5864_handle_frame() in drivers/media/pci/tw5864/tw5864-video.c, which may cause denial of service, aka CID-2e7682ebfc75.

Affected products

Linux kernel: before 5.2 — fixed in 5.2

How to fix

Upgrade to a fixed version: Linux kernel 5.2. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2e7682ebfc750177a4944eeb56e97a3f05734528
https://github.com/torvalds/linux/commit/2e7682ebfc750177a4944eeb56e97a3f05734528
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
https://security.netapp.com/advisory/ntap-20200619-0001/
https://www.debian.org/security/2020/dsa-4698
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2e7682ebfc750177a4944eeb56e97a3f05734528
https://github.com/torvalds/linux/commit/2e7682ebfc750177a4944eeb56e97a3f05734528
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html

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