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Mageia 8: MGASA-2021-0398 Moderate: Kernel-Linus BPF Memory Exposure

This kernel-linus update is based on upstream 5.10.56 and fixes atleast the following security issues: In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store . MGASA-2021-0398 - Updated kernel-linus packages fix security vulnerabilities Publication date: 07 Aug 2021 URL: https://advisories.mageia.org/MGASA-2021-0398.html Type: security Affected Mageia releases: 8 CVE: CVE-2021-34556, CVE-2021-35477 This kernel-linus update is based on upstream 5.10.56 and fixes atleast the following security issues: In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects the possibility of uninitialized memory locations on the BPF stack (CVE-2021-34556). In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because a certain preempting store operation does not necessarily occur before a store operation that has an attacker-controlled value (CVE-2021-35477). For other upstream fixes, see the referenced changelogs. References: - https://bugs.mageia.org/show_bug.cgi?id=29313 - https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.53 - https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.54 - https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.55 - https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.56 - https://www.cve.org/CVERecord?id=CVE-2021-34556 - https://www.cve.org/CVERecord?id=CVE-2021-35477 SRPMS: - 8/core/kernel-linus-5.10.56-1.mga8 . Kernel-linus upgrade MGASA-2021-0399 tackles significant vulnerabilities within Mageia, boosting overall system security and resilience.. kernel-linus, Mageia security, memory safety, speculative store. . LinuxSecurity.com Team

Aug 07, 2021 Mageia