CVE-2020-27830
MEDIUMCVSS 5.5/10EPSS 0.30%
Last modified
CVE-2020-27830 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.. EPSS estimates a 0.30% chance of exploitation in the next 30 days.
Description
A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.9.14 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
References
- http://www.openwall.com/lists/oss-security/2020/12/08/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/12/08/4Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1919900Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00018.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210625-0004/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4843Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/12/08/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/12/08/4Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1919900Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00018.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210625-0004/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4843Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-27830?
A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.
How severe is CVE-2020-27830?
CVE-2020-27830 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.
How do I fix CVE-2020-27830?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2020-27830?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST