CVE-2020-29661

high

Description

A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b.

References

https://www.oracle.com/security-alerts/cpuoct2021.html

https://www.debian.org/security/2021/dsa-4843

https://security.netapp.com/advisory/ntap-20210122-0001/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MZ7OAKAEFAXQRGBZK4LYUWINCD3D2XCL/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BOB25SU6XUL4TNP7KB63WNZSYTIYFDPP/

https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html

https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html

http://www.openwall.com/lists/oss-security/2020/12/10/1

http://packetstormsecurity.com/files/164950/Kernel-Live-Patch-Security-Notice-LSN-0082-1.html

http://packetstormsecurity.com/files/160681/Linux-TIOCSPGRP-Broken-Locking.html

https://www.cisa.gov/news-events/ics-advisories/icsa-24-074-07

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=54ffccbf053b5b6ca4f6e45094b942fab92a25fc

Details

Source: Mitre, NVD

Published: 2020-12-09

Updated: 2023-11-07

Risk Information

CVSS v2

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H