Updated kernel-linus packages fix security vulnerabilities
Publication date: 26 Jul 2023Type: security
Affected Mageia releases : 8
CVE: CVE-2023-20593 , CVE-2023-31248 , CVE-2023-35001
Description
This kernel-linus update is based on upstream 5.15.122 and fixes atleast the following security issues: Under specific microarchitectural circumstances, a register in "Zen 2" CPUs may not be written to 0 correctly. This may cause data from another process and/or thread to be stored in the YMM register, which may allow an attacker to potentially access sensitive information (CVE-2023-20593, also known as Zenbleed). This update adds a kernel-side mitigation for this issue to protect users until Amd gets their fixed microcode / AGESA updates out for all affected CPUs. The fixed microcode for Amd EPYC gen2 is available in the microcode-0.20230613-2.mga8.nonfree package. For other affected CPUs, see the referenced amd.com url that has info about estimated microcode update timelines for various CPUs. Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; nft_chain_lookup_byid() failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace (CVE-2023-31248). Linux Kernel nftables Out-Of-Bounds Read/Write Vulnerability; nft_byteorder poorly handled vm register contents when CAP_NET_ADMIN is in any user or network namespace (CVE-2023-35001). For other upstream fixes in this update, see the referenced changelogs.
References
- https://bugs.mageia.org/show_bug.cgi?id=32140
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.121
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.122
- https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7008.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-20593
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-31248
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-35001
SRPMS
8/core
- kernel-linus-5.15.122-1.mga8