CVE-2020-14416

Severity: medium (CVSS 4.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-06-18 · updated 2026-10-08
Weakness: CWE-362

Description

In the Linux kernel before 5.4.16, a race condition in tty->disc_data handling in the slip and slcan line discipline could lead to a use-after-free, aka CID-0ace17d56824. This affects drivers/net/slip/slip.c and drivers/net/can/slcan.c.

Affected products

Linux kernel: before 5.4.16 — fixed in 5.4.16
openSUSE Leap: 15.1, 15.2

How to fix

Upgrade to a fixed version: Linux kernel 5.4.16. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html
https://bugzilla.suse.com/show_bug.cgi?id=1162002
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.16
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ace17d56824165c7f4c68785d6b58971db954dd
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html
https://bugzilla.suse.com/show_bug.cgi?id=1162002
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.16
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ace17d56824165c7f4c68785d6b58971db954dd

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