CVE-2021-3444
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-3444
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3444.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-3444
- Aliases
-
- A-183694099
- PUB-A-183694099
- Related
- Published
- 2021-03-23T18:15:13Z
- Modified
- 2024-09-18T01:00:20Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in the upstream kernel in commit 9b00f1b78809 ("bpf: Fix truncation handling for mod32 dst reg wrt zero") and in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101.
- References
-
- http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
- http://packetstormsecurity.com/files/164950/Kernel-Live-Patch-Security-Notice-LSN-0082-1.html
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9b00f1b78809
- https://security.netapp.com/advisory/ntap-20210416-0006/
- http://www.openwall.com/lists/oss-security/2021/03/23/2
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- https://www.openwall.com/lists/oss-security/2021/03/23/2
- https://security-tracker.debian.org/tracker/CVE-2021-3444
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source