{"id":"CVE-2024-44968","summary":"tick/broadcast: Move per CPU pointer access into the atomic section","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntick/broadcast: Move per CPU pointer access into the atomic section\n\nThe recent fix for making the take over of the broadcast timer more\nreliable retrieves a per CPU pointer in preemptible context.\n\nThis went unnoticed as compilers hoist the access into the non-preemptible\nregion where the pointer is actually used. But of course it's valid that\nthe compiler keeps it at the place where the code puts it which rightfully\ntriggers:\n\n  BUG: using smp_processor_id() in preemptible [00000000] code:\n       caller is hotplug_cpu__broadcast_tick_pull+0x1c/0xc0\n\nMove it to the actual usage site which is in a non-preemptible region.","modified":"2026-04-02T12:18:32.113250Z","published":"2024-09-04T18:56:45.456Z","related":["MGASA-2024-0309","MGASA-2024-0310"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/44xxx/CVE-2024-44968.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/541a900d245536d4809cb1aa322c3fcc2cdb58a6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/668c6c4a7e9e9f081c06b70f30104fb7013437ed"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6881e75237a84093d0986f56223db3724619f26e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7b3ec186ba93e333e9efe7254e7e31c1828e5d2d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7dd12f85f150010ef7518201c63fa7e395f5c3e9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b9d604933d5fd72dd37f24e1dc35f778297d745a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f54abf332a2bc0413cfa8bd6a8511f7aa99faea0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f91fb47ecacc178a83a77eeebd25cbaec18c01d6"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/44xxx/CVE-2024-44968.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-44968"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"dfe19aa91378972f10530635ad83b2d77f481044"},{"fixed":"f54abf332a2bc0413cfa8bd6a8511f7aa99faea0"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"457a1c87d454455d671a3045cf0b56157be110a1"},{"fixed":"f91fb47ecacc178a83a77eeebd25cbaec18c01d6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"9ef7190228145f959d9bc0ddca40ecf76bb413b0"},{"fixed":"668c6c4a7e9e9f081c06b70f30104fb7013437ed"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d3b165c10473aa6fc6141bb5b1f6e5b50c1fb774"},{"fixed":"541a900d245536d4809cb1aa322c3fcc2cdb58a6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"408bfb6b0a7f22e971ce6b600aec448769e580a8"},{"fixed":"7b3ec186ba93e333e9efe7254e7e31c1828e5d2d"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3a58c590f6bd1d20eb1e76c5cea31c36cc032339"},{"fixed":"b9d604933d5fd72dd37f24e1dc35f778297d745a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2cdab4b4bf77369961f706cdeb7d040db10c5217"},{"fixed":"7dd12f85f150010ef7518201c63fa7e395f5c3e9"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f7d43dd206e7e18c182f200e67a8db8c209907fa"},{"fixed":"6881e75237a84093d0986f56223db3724619f26e"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-44968.json"}}],"schema_version":"1.7.5"}