CVE-2021-27645: Double Free
First published: Wed Feb 24 2021(Updated: )
Last updated 24 July 2024
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GNU glibc | >=2.29<=2.33 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| Debian Debian Linux | =10.0 | |
| debian/glibc | 2.31-13+deb11u11 2.31-13+deb11u10 2.36-9+deb12u8 2.36-9+deb12u7 2.40-3 |
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Reference Links
- https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/
- https://security.gentoo.org/glsa/202107-07
- https://sourceware.org/bugzilla/show_bug.cgi?id=27462
- https://launchpad.net/bugs/cve/CVE-2021-27645
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/
- https://sourceware.org/git/?p=glibc.git;a=commit;h=745664bd798ec8fd50438605948eea594179fba1
- https://sourceware.org/git/?p=glibc.git;a=commit;h=dca565886b5e8bd7966e15f0ca42ee5cff686673
- https://salsa.debian.org/glibc-team/glibc/-/commit/aea56157b456d4d9bef337d0149e952a41a7d919
- https://security-tracker.debian.org/tracker/CVE-2021-27645
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27645
- https://nvd.nist.gov/vuln/detail/CVE-2021-27645
- https://ubuntu.com/security/CVE-2021-27645
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-27645.
What is the severity level of CVE-2021-27645?
The severity level of CVE-2021-27645 is low with a score of 2.5.
What software is affected by CVE-2021-27645?
The GNU C Library (glibc) versions 2.29 through 2.33, Fedora versions 33 and 34, and Debian Linux version 10.0 are affected by CVE-2021-27645.
What is the impact of CVE-2021-27645?
CVE-2021-27645 may lead to a crash in the nameserver caching daemon (nscd), potentially resulting in degraded service or Denial of Service on the local system.
Are there any references available for CVE-2021-27645?
Yes, you can find references for CVE-2021-27645 [here](https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html), [here](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/), and [here](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/).
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