{"id":"CVE-2023-52940","state":"PUBLISHED","title":"mm: multi-gen LRU: fix crash during cgroup migration","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm: multi-gen LRU: fix crash during cgroup migration\n\nlru_gen_migrate_mm() assumes lru_gen_add_mm() runs prior to itself.  This\nisn't true for the following scenario:\n\n    CPU 1                         CPU 2\n\n  clone()\n    cgroup_can_fork()\n                                cgroup_procs_write()\n    cgroup_post_fork()\n                                  task_lock()\n                                  lru_gen_migrate_mm()\n                                  task_unlock()\n    task_lock()\n    lru_gen_add_mm()\n    task_unlock()\n\nAnd when the above happens, kernel crashes because of linked list\ncorruption (mm_struct->lru_gen.list).","publishedAt":"2025-03-27T16:37:18.691Z","updatedAt":"2026-05-11T19:36:08.357Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bd74fdaea146029e4fa12c6de89adbe0779348a9","status":"affected","lessThan":"04448022311cebd30969d3aebdde765f1258b360","versionType":"git"},{"version":"bd74fdaea146029e4fa12c6de89adbe0779348a9","status":"affected","lessThan":"de08eaa6156405f2e9369f06ba5afae0e4ab3b62","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/vmscan.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.1","versionType":"semver"},{"version":"6.1.11","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/vmscan.c"]}],"references":["https://git.kernel.org/stable/c/04448022311cebd30969d3aebdde765f1258b360","https://git.kernel.org/stable/c/de08eaa6156405f2e9369f06ba5afae0e4ab3b62"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/52xxx/CVE-2023-52940.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-52940","state":"PUBLISHED","datePublished":"2025-03-27T16:37:18.691Z","dateUpdated":"2026-05-11T19:36:08.357Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-08-21T06:07:11.022Z"},"containers":{"cna":{"title":"mm: multi-gen LRU: fix crash during cgroup migration","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm: multi-gen LRU: fix crash during cgroup migration\n\nlru_gen_migrate_mm() assumes lru_gen_add_mm() runs prior to itself.  This\nisn't true for the following scenario:\n\n    CPU 1                         CPU 2\n\n  clone()\n    cgroup_can_fork()\n                                cgroup_procs_write()\n    cgroup_post_fork()\n                                  task_lock()\n                                  lru_gen_migrate_mm()\n                                  task_unlock()\n    task_lock()\n    lru_gen_add_mm()\n    task_unlock()\n\nAnd when the above happens, kernel crashes because of linked list\ncorruption (mm_struct->lru_gen.list)."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bd74fdaea146029e4fa12c6de89adbe0779348a9","status":"affected","lessThan":"04448022311cebd30969d3aebdde765f1258b360","versionType":"git"},{"version":"bd74fdaea146029e4fa12c6de89adbe0779348a9","status":"affected","lessThan":"de08eaa6156405f2e9369f06ba5afae0e4ab3b62","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/vmscan.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.1","versionType":"semver"},{"version":"6.1.11","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/vmscan.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/04448022311cebd30969d3aebdde765f1258b360"},{"url":"https://git.kernel.org/stable/c/de08eaa6156405f2e9369f06ba5afae0e4ab3b62"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:36:08.357Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.1.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}