Vulnerability in Linux Kernel
CVE-2020-28941
An issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in the Linux kernel through 5.9.9. Local attackers on systems with the speakup driver could cause a local denial of service attack, aka CID-d41227544427. This occurs because of an invalid free when the line discipline is used more than once.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (24.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Linux Kernel
- Debian Linux — versions 9.0
- Fedoraproject Fedora — versions 32, 33
Weakness classification (CWE)
Public proof-of-concept exploits
References
- git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/commit/ (Patch, Vendor Advisory)
- www.openwall.com/lists/oss-security/2020/11/19/3 (Patch, Mailing List, Third Party Advisory)
- github.com/torvalds/linux/commit/d4122754442799187d5d537a9c039a49a67e57f1 (Patch, Third Party Advisory)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
- www.openwall.com/lists/oss-security/2020/11/19/5 (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)
- lists.debian.org/debian-lts-announce/2020/12/msg00015.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-28941?
- CVE-2020-28941 is a medium-severity vulnerability in Linux Kernel, classified under Release of Invalid Pointer or Reference. CVSS score: 5.5/10. Published 2020-11-19.
- How severe is CVE-2020-28941?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2020-28941 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.