{"id":"CVE-2024-50115","summary":"KVM: nSVM: Ignore nCR3[4:0] when loading PDPTEs from memory","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nSVM: Ignore nCR3[4:0] when loading PDPTEs from memory\n\nIgnore nCR3[4:0] when loading PDPTEs from memory for nested SVM, as bits\n4:0 of CR3 are ignored when PAE paging is used, and thus VMRUN doesn't\nenforce 32-byte alignment of nCR3.\n\nIn the absolute worst case scenario, failure to ignore bits 4:0 can result\nin an out-of-bounds read, e.g. if the target page is at the end of a\nmemslot, and the VMM isn't using guard pages.\n\nPer the APM:\n\n  The CR3 register points to the base address of the page-directory-pointer\n  table. The page-directory-pointer table is aligned on a 32-byte boundary,\n  with the low 5 address bits 4:0 assumed to be 0.\n\nAnd the SDM's much more explicit:\n\n  4:0    Ignored\n\nNote, KVM gets this right when loading PDPTRs, it's only the nSVM flow\nthat is broken.","modified":"2026-04-02T12:21:17.373341Z","published":"2024-11-05T17:10:46.677Z","related":["ALSA-2024:11486","MGASA-2024-0368","MGASA-2024-0369","SUSE-SU-2024:4313-1","SUSE-SU-2024:4314-1","SUSE-SU-2024:4315-1","SUSE-SU-2024:4316-1","SUSE-SU-2024:4317-1","SUSE-SU-2024:4318-1","SUSE-SU-2024:4345-1","SUSE-SU-2024:4346-1","SUSE-SU-2024:4364-1","SUSE-SU-2024:4367-1","SUSE-SU-2024:4376-1","SUSE-SU-2024:4387-1","SUSE-SU-2024:4388-1","SUSE-SU-2025:0035-1","SUSE-SU-2025:01590-1","SUSE-SU-2025:01593-1","SUSE-SU-2025:01601-1","SUSE-SU-2025:01603-1","SUSE-SU-2025:01610-1","SUSE-SU-2025:01652-1","SUSE-SU-2025:01655-1","SUSE-SU-2025:01656-1","SUSE-SU-2025:01663-1","SUSE-SU-2025:01668-1","SUSE-SU-2025:01669-1","SUSE-SU-2025:01675-1","SUSE-SU-2025:01676-1","SUSE-SU-2025:01677-1","SUSE-SU-2025:01682-1","SUSE-SU-2025:01683-1","SUSE-SU-2025:01692-1","SUSE-SU-2025:0784-1","SUSE-SU-2025:0833-1","SUSE-SU-2025:0833-2","SUSE-SU-2025:0834-1","SUSE-SU-2025:0835-1","SUSE-SU-2025:0847-1","SUSE-SU-2025:0853-1","SUSE-SU-2025:0855-1","SUSE-SU-2025:0856-1","SUSE-SU-2025:0867-1","SUSE-SU-2025:0945-1","SUSE-SU-2025:0955-1","SUSE-SU-2025:20163-1","SUSE-SU-2025:20164-1","SUSE-SU-2025:20190-1","SUSE-SU-2025:20192-1","SUSE-SU-2025:20246-1","SUSE-SU-2025:20247-1","SUSE-SU-2025:20260-1","SUSE-SU-2025:20270-1","SUSE-SU-2025:20339-1","SUSE-SU-2025:20340-1","SUSE-SU-2025:20349-1","SUSE-SU-2025:20351-1","SUSE-SU-2025:20367-1","SUSE-SU-2025:20368-1","SUSE-SU-2025:4123-1","USN-7276-1","USN-7277-1","openSUSE-SU-2024:14500-1","openSUSE-SU-2025:14705-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50115.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2c4adc9b192a0815fe58a62bc0709449416cc884"},{"type":"WEB","url":"https://git.kernel.org/stable/c/426682afec71ea3f889b972d038238807b9443e4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/58cb697d80e669c56197f703e188867c8c54c494"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6876793907cbe19d42e9edc8c3315a21e06c32ae"},{"type":"WEB","url":"https://git.kernel.org/stable/c/76ce386feb14ec9a460784fcd495d8432acce7a5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f559b2e9c5c5308850544ab59396b7d53cfc67bd"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50115.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-50115"},{"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":"e4e517b4be019787ada4cbbce2f04570c21b0cbd"},{"fixed":"76ce386feb14ec9a460784fcd495d8432acce7a5"},{"fixed":"58cb697d80e669c56197f703e188867c8c54c494"},{"fixed":"6876793907cbe19d42e9edc8c3315a21e06c32ae"},{"fixed":"2c4adc9b192a0815fe58a62bc0709449416cc884"},{"fixed":"426682afec71ea3f889b972d038238807b9443e4"},{"fixed":"f559b2e9c5c5308850544ab59396b7d53cfc67bd"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-50115.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"}]}