CVE-2020-27830: Null Pointer Dereference
First published: Mon Jan 25 2021(Updated: )
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.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <5.9.14 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| redhat/kernel | <5.9.14 | 5.9.14 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2020/12/08/1
- http://www.openwall.com/lists/oss-security/2020/12/08/4
- https://bugzilla.redhat.com/show_bug.cgi?id=1919900
- https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
- https://security.netapp.com/advisory/ntap-20210625-0004/
- https://www.debian.org/security/2021/dsa-4843
- https://launchpad.net/bugs/cve/CVE-2020-27830
- https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git/commit/?h=char-misc-linus&id=f0992098cadb4c9c6a00703b66cafe604e178fea
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1919903
- https://access.redhat.com/security/cve/cve-2020-27830
- https://www.openwall.com/lists/oss-security/2020/12/07/1
- https://git.kernel.org/linus/f0992098cadb4c9c6a00703b66cafe604e178fea
- https://security-tracker.debian.org/tracker/CVE-2020-27830
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27830
- https://nvd.nist.gov/vuln/detail/CVE-2020-27830
- https://ubuntu.com/security/CVE-2020-27830
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