Use After Free in Broadcom Fabric Operating System
CVE-2020-29661
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (66.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
- www.openwall.com/lists/oss-security/2020/12/10/1 (mailing-list, Patch, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.debian.org/security/2021/dsa-4843 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/02/msg00018.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/03/msg00010.html (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com/security-alerts/cpuoct2021.html (Patch, Third Party Advisory)
- packetstormsecurity.com/files/160681/Linux-TIOCSPGRP-Broken-Locking.html (VDB Entry, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210122-0001/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-29661?
- CVE-2020-29661 is a high-severity vulnerability in Broadcom Fabric Operating System, classified under Use After Free. CVSS score: 7.8/10. Published 2020-12-09.
- How severe is CVE-2020-29661?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2020-29661 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.