CVE-2021-20239: Buffer Overflow
First published: Mon Feb 01 2021(Updated: )
A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <5.4.92 | |
| Redhat Enterprise Linux | =5.0 | |
| Redhat Enterprise Linux | =6.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Fedoraproject Fedora | =33 | |
| redhat/kernel | <5.4.92 | 5.4.92 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.5-1 6.11.7-1 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1923636
- https://launchpad.net/bugs/cve/CVE-2021-20239
- https://www.zerodayinitiative.com/advisories/ZDI-21-100/
- https://gist.github.com/Ga-ryo/2ec958e78f55c5d18558960f3fe1c6ec
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1923640
- https://access.redhat.com/errata/RHSA-2021:4140
- https://access.redhat.com/errata/RHSA-2021:4356
- https://security-tracker.debian.org/tracker/CVE-2021-20239
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20239
- https://nvd.nist.gov/vuln/detail/CVE-2021-20239
- https://ubuntu.com/security/CVE-2021-20239
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