{"id":"MGASA-2022-0279","summary":"Updated kernel-linus packages fix security vulnerabilities","details":"This kernel-linus update is based on upstream 5.15.58 and fixes at least\nthe following security issues:\n\nKernel lockdown bypass when UEFI secure boot is disabled / unavailable\nand IMA appraisal is enabled (CVE-2022-21505).\n\nAliases in the branch predictor may cause some AMD processors to predict\nthe wrong branch type potentially leading to information disclosure\n(CVE-2022-23825).\n\nMis-trained branch predictions for return instructions may allow arbitrary\nspeculative code execution under certain microarchitecture-dependent\nconditions (CVE-2022-29900, RetBleed).\n\nIntel microprocessor generations 6 to 8 are affected by a new Spectre\nvariant that is able to bypass their retpoline mitigation in the kernel\nto leak arbitrary data. An attacker with unprivileged user access can\nhijack return instructions to achieve arbitrary speculative code execution\nunder certain microarchitecture-dependent conditions (CVE-2022-29901).\n\nThe Linux kernel before 5.18.13 lacks a certain clear operation for the\nblock starting symbol (.bss). This allows Xen PV guest OS users to cause\na denial of service or gain privileges (CVE-2022-36123).\n\nAn issue was discovered in the Linux kernel through 5.18.14.\nxfrm_expand_policies in net/xfrm/xfrm_policy.c can cause a refcount to be\ndropped twice (CVE-2022-36879).\n\nFor other upstream fixes, see the referenced changelogs.\n","modified":"2026-02-02T09:19:20.778138Z","published":"2022-08-06T15:43:47Z","related":["CVE-2022-21505","CVE-2022-23825","CVE-2022-29900","CVE-2022-29901","CVE-2022-36123","CVE-2022-36879"],"references":[{"type":"ADVISORY","url":"https://advisories.mageia.org/MGASA-2022-0279.html"},{"type":"REPORT","url":"https://bugs.mageia.org/show_bug.cgi?id=30688"},{"type":"REPORT","url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.56"},{"type":"REPORT","url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.57"},{"type":"REPORT","url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.58"},{"type":"REPORT","url":"https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1037"},{"type":"REPORT","url":"https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00702.html"}],"affected":[{"package":{"name":"kernel-linus","ecosystem":"Mageia:8","purl":"pkg:rpm/mageia/kernel-linus?arch=source&distro=mageia-8"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.58-1.mga8"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2022-0279.json"}}],"schema_version":"1.7.3","credits":[{"name":"Mageia","contact":["https://wiki.mageia.org/en/Packages_Security_Team"],"type":"COORDINATOR"}]}