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CVE-2020-27194

Status Candidate

Overview

An issue was discovered in the Linux kernel before 5.8.15. scalar32_min_max_or in kernel/bpf/verifier.c mishandles bounds tracking during use of 64-bit values, aka CID-5b9fbeb75b6a.

Related Files

Ubuntu Security Notice USN-4626-1
Posted Nov 11, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4626-1 - Simon Scannell discovered that the bpf verifier in the Linux kernel did not properly calculate register bounds for certain operations. A local attacker could use this to expose sensitive information or gain administrative privileges. Moritz Lipp, Michael Schwarz, Andreas Kogler, David Oswald, Catherine Easdon, Claudio Canella, and Daniel Gruss discovered that the Intel Running Average Power Limit driver in the Linux kernel did not properly restrict access to power data. A local attacker could possibly use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-27194, CVE-2020-8694
MD5 | 826290928fcd6e76f591d4feea48dd2f
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