{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-52707","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-03-07T14:49:46.891Z","datePublished":"2024-05-21T15:22:55.315Z","dateUpdated":"2025-05-04T07:42:03.735Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:42:03.735Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched/psi: Fix use-after-free in ep_remove_wait_queue()\n\nIf a non-root cgroup gets removed when there is a thread that registered\ntrigger and is polling on a pressure file within the cgroup, the polling\nwaitqueue gets freed in the following path:\n\n do_rmdir\n   cgroup_rmdir\n     kernfs_drain_open_files\n       cgroup_file_release\n         cgroup_pressure_release\n           psi_trigger_destroy\n\nHowever, the polling thread still has a reference to the pressure file and\nwill access the freed waitqueue when the file is closed or upon exit:\n\n fput\n   ep_eventpoll_release\n     ep_free\n       ep_remove_wait_queue\n         remove_wait_queue\n\nThis results in use-after-free as pasted below.\n\nThe fundamental problem here is that cgroup_file_release() (and\nconsequently waitqueue's lifetime) is not tied to the file's real lifetime.\nUsing wake_up_pollfree() here might be less than ideal, but it is in line\nwith the comment at commit 42288cb44c4b (\"wait: add wake_up_pollfree()\")\nsince the waitqueue's lifetime is not tied to file's one and can be\nconsidered as another special case. While this would be fixable by somehow\nmaking cgroup_file_release() be tied to the fput(), it would require\nsizable refactoring at cgroups or higher layer which might be more\njustifiable if we identify more cases like this.\n\n  BUG: KASAN: use-after-free in _raw_spin_lock_irqsave+0x60/0xc0\n  Write of size 4 at addr ffff88810e625328 by task a.out/4404\n\n\tCPU: 19 PID: 4404 Comm: a.out Not tainted 6.2.0-rc6 #38\n\tHardware name: Amazon EC2 c5a.8xlarge/, BIOS 1.0 10/16/2017\n\tCall Trace:\n\t<TASK>\n\tdump_stack_lvl+0x73/0xa0\n\tprint_report+0x16c/0x4e0\n\tkasan_report+0xc3/0xf0\n\tkasan_check_range+0x2d2/0x310\n\t_raw_spin_lock_irqsave+0x60/0xc0\n\tremove_wait_queue+0x1a/0xa0\n\tep_free+0x12c/0x170\n\tep_eventpoll_release+0x26/0x30\n\t__fput+0x202/0x400\n\ttask_work_run+0x11d/0x170\n\tdo_exit+0x495/0x1130\n\tdo_group_exit+0x100/0x100\n\tget_signal+0xd67/0xde0\n\tarch_do_signal_or_restart+0x2a/0x2b0\n\texit_to_user_mode_prepare+0x94/0x100\n\tsyscall_exit_to_user_mode+0x20/0x40\n\tdo_syscall_64+0x52/0x90\n\tentry_SYSCALL_64_after_hwframe+0x63/0xcd\n\t</TASK>\n\n Allocated by task 4404:\n\n\tkasan_set_track+0x3d/0x60\n\t__kasan_kmalloc+0x85/0x90\n\tpsi_trigger_create+0x113/0x3e0\n\tpressure_write+0x146/0x2e0\n\tcgroup_file_write+0x11c/0x250\n\tkernfs_fop_write_iter+0x186/0x220\n\tvfs_write+0x3d8/0x5c0\n\tksys_write+0x90/0x110\n\tdo_syscall_64+0x43/0x90\n\tentry_SYSCALL_64_after_hwframe+0x63/0xcd\n\n Freed by task 4407:\n\n\tkasan_set_track+0x3d/0x60\n\tkasan_save_free_info+0x27/0x40\n\t____kasan_slab_free+0x11d/0x170\n\tslab_free_freelist_hook+0x87/0x150\n\t__kmem_cache_free+0xcb/0x180\n\tpsi_trigger_destroy+0x2e8/0x310\n\tcgroup_file_release+0x4f/0xb0\n\tkernfs_drain_open_files+0x165/0x1f0\n\tkernfs_drain+0x162/0x1a0\n\t__kernfs_remove+0x1fb/0x310\n\tkernfs_remove_by_name_ns+0x95/0xe0\n\tcgroup_addrm_files+0x67f/0x700\n\tcgroup_destroy_locked+0x283/0x3c0\n\tcgroup_rmdir+0x29/0x100\n\tkernfs_iop_rmdir+0xd1/0x140\n\tvfs_rmdir+0xfe/0x240\n\tdo_rmdir+0x13d/0x280\n\t__x64_sys_rmdir+0x2c/0x30\n\tdo_syscall_64+0x43/0x90\n\tentry_SYSCALL_64_after_hwframe+0x63/0xcd"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/sched/psi.c"],"versions":[{"version":"0e94682b73bfa6c44c98af7a26771c9c08c055d5","lessThan":"7caeb5457bd01ccba0df1d6f4872f20d28e50b38","status":"affected","versionType":"git"},{"version":"0e94682b73bfa6c44c98af7a26771c9c08c055d5","lessThan":"ec9c7aa08819f976b2492fa63c41b5712d2924b5","status":"affected","versionType":"git"},{"version":"0e94682b73bfa6c44c98af7a26771c9c08c055d5","lessThan":"cca2b3feb70170ef6f0fbc4b4d91eea235a2b73a","status":"affected","versionType":"git"},{"version":"0e94682b73bfa6c44c98af7a26771c9c08c055d5","lessThan":"c6879a4dcefe92d870ab68cabaa9caeda4f2af5a","status":"affected","versionType":"git"},{"version":"0e94682b73bfa6c44c98af7a26771c9c08c055d5","lessThan":"c2dbe32d5db5c4ead121cf86dabd5ab691fb47fe","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/sched/psi.c"],"versions":[{"version":"5.2","status":"affected"},{"version":"0","lessThan":"5.2","status":"unaffected","versionType":"semver"},{"version":"5.4.232","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.169","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.95","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.13","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"5.4.232"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"5.10.169"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"5.15.95"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.1.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/7caeb5457bd01ccba0df1d6f4872f20d28e50b38"},{"url":"https://git.kernel.org/stable/c/ec9c7aa08819f976b2492fa63c41b5712d2924b5"},{"url":"https://git.kernel.org/stable/c/cca2b3feb70170ef6f0fbc4b4d91eea235a2b73a"},{"url":"https://git.kernel.org/stable/c/c6879a4dcefe92d870ab68cabaa9caeda4f2af5a"},{"url":"https://git.kernel.org/stable/c/c2dbe32d5db5c4ead121cf86dabd5ab691fb47fe"}],"title":"sched/psi: Fix use-after-free in ep_remove_wait_queue()","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-06-17T17:37:08.537145Z","id":"CVE-2023-52707","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-17T17:37:46.100Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T23:11:35.459Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/7caeb5457bd01ccba0df1d6f4872f20d28e50b38","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/ec9c7aa08819f976b2492fa63c41b5712d2924b5","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/cca2b3feb70170ef6f0fbc4b4d91eea235a2b73a","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/c6879a4dcefe92d870ab68cabaa9caeda4f2af5a","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/c2dbe32d5db5c4ead121cf86dabd5ab691fb47fe","tags":["x_transferred"]}]}]}}