{"id":"CVE-2023-52633","summary":"um: time-travel: fix time corruption","details":"In the Linux kernel, the following vulnerability has been resolved:\n\num: time-travel: fix time corruption\n\nIn 'basic' time-travel mode (without =inf-cpu or =ext), we\nstill get timer interrupts. These can happen at arbitrary\npoints in time, i.e. while in timer_read(), which pushes\ntime forward just a little bit. Then, if we happen to get\nthe interrupt after calculating the new time to push to,\nbut before actually finishing that, the interrupt will set\nthe time to a value that's incompatible with the forward,\nand we'll crash because time goes backwards when we do the\nforwarding.\n\nFix this by reading the time_travel_time, calculating the\nadjustment, and doing the adjustment all with interrupts\ndisabled.","modified":"2026-04-02T09:43:09.588077Z","published":"2024-04-02T06:49:11.596Z","related":["USN-6818-2","USN-6819-2"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52633.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0c7478a2da3f5fe106b4658338873d50c86ac7ab"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4f7dad73df4cdb2b7042103d3922745d040ad025"},{"type":"WEB","url":"https://git.kernel.org/stable/c/abe4eaa8618bb36c2b33e9cdde0499296a23448c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b427f55e9d4185f6f17cc1e3296eb8d0c4425283"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de3e9d8e8d1ae0a4d301109d1ec140796901306c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52633.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52633"},{"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":"065038706f77a56754e8f0c2556dab7e22dfe577"},{"fixed":"0c7478a2da3f5fe106b4658338873d50c86ac7ab"},{"fixed":"4f7dad73df4cdb2b7042103d3922745d040ad025"},{"fixed":"de3e9d8e8d1ae0a4d301109d1ec140796901306c"},{"fixed":"b427f55e9d4185f6f17cc1e3296eb8d0c4425283"},{"fixed":"abe4eaa8618bb36c2b33e9cdde0499296a23448c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52633.json"}}],"schema_version":"1.7.5"}