Use After Free in Broadcom Fabric Operating System
CVE-2020-29660
A locking inconsistency issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may allow a read-after-free attack against TIOCGSID, aka CID-c8bcd9c5be24.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (41.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · 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/ (Exploit, 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)
- security.netapp.com/advisory/ntap-20210122-0001/ (Third Party 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)
- packetstormsecurity.com/files/164950/Kernel-Live-Patch-Security-Notice-LSN-0082… (Exploit, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-29660?
- CVE-2020-29660 is a medium-severity vulnerability in Broadcom Fabric Operating System, classified under Use After Free. CVSS score: 4.4/10. Published 2020-12-09.
- How severe is CVE-2020-29660?
- Medium severity. CVSS v3 base score is 4.4 out of 10.
- Is CVE-2020-29660 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.