{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-50620", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-08T01:14:55.189Z", "datePublished": "2025-12-08T01:16:33.771Z", "dateUpdated": "2025-12-08T01:16:33.771Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-08T01:16:33.771Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to invalidate dcc->f2fs_issue_discard in error path\n\nSyzbot reports a NULL pointer dereference issue as below:\n\n __refcount_add include/linux/refcount.h:193 [inline]\n __refcount_inc include/linux/refcount.h:250 [inline]\n refcount_inc include/linux/refcount.h:267 [inline]\n get_task_struct include/linux/sched/task.h:110 [inline]\n kthread_stop+0x34/0x1c0 kernel/kthread.c:703\n f2fs_stop_discard_thread+0x3c/0x5c fs/f2fs/segment.c:1638\n kill_f2fs_super+0x5c/0x194 fs/f2fs/super.c:4522\n deactivate_locked_super+0x70/0xe8 fs/super.c:332\n deactivate_super+0xd0/0xd4 fs/super.c:363\n cleanup_mnt+0x1f8/0x234 fs/namespace.c:1186\n __cleanup_mnt+0x20/0x30 fs/namespace.c:1193\n task_work_run+0xc4/0x14c kernel/task_work.c:177\n exit_task_work include/linux/task_work.h:38 [inline]\n do_exit+0x26c/0xbe0 kernel/exit.c:795\n do_group_exit+0x60/0xe8 kernel/exit.c:925\n __do_sys_exit_group kernel/exit.c:936 [inline]\n __se_sys_exit_group kernel/exit.c:934 [inline]\n __wake_up_parent+0x0/0x40 kernel/exit.c:934\n __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]\n invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]\n el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142\n do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206\n el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636\n el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654\n el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581\n\nThe root cause of this issue is in error path of f2fs_start_discard_thread(),\nit missed to invalidate dcc->f2fs_issue_discard, later kthread_stop() may\naccess invalid pointer."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/segment.c"], "versions": [{"version": "4d67490498acb4ffcef5ba7bc44990d46e66a44c", "lessThan": "865bb7b5a7deeb0e5afbd82381d52d38825dc64d", "status": "affected", "versionType": "git"}, {"version": "4d67490498acb4ffcef5ba7bc44990d46e66a44c", "lessThan": "a3e517a6ba695d683ee63615e1ea6e6b4c7d2732", "status": "affected", "versionType": "git"}, {"version": "4d67490498acb4ffcef5ba7bc44990d46e66a44c", "lessThan": "ae6c960a82c52c3bda5adc82d90643d6c12d308e", "status": "affected", "versionType": "git"}, {"version": "4d67490498acb4ffcef5ba7bc44990d46e66a44c", "lessThan": "91586ce0d39a05f88795aa8814fb99b1387236b3", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/segment.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.86", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.16", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.2", "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": "5.15", "versionEndExcluding": "5.15.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.0.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/865bb7b5a7deeb0e5afbd82381d52d38825dc64d"}, {"url": "https://git.kernel.org/stable/c/a3e517a6ba695d683ee63615e1ea6e6b4c7d2732"}, {"url": "https://git.kernel.org/stable/c/ae6c960a82c52c3bda5adc82d90643d6c12d308e"}, {"url": "https://git.kernel.org/stable/c/91586ce0d39a05f88795aa8814fb99b1387236b3"}], "title": "f2fs: fix to invalidate dcc->f2fs_issue_discard in error path", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to invalidate dcc->f2fs_issue_discard in error path\n\nSyzbot reports a NULL pointer dereference issue as below:\n\n __refcount_add include/linux/refcount.h:193 [inline]\n __refcount_inc include/linux/refcount.h:250 [inline]\n refcount_inc include/linux/refcount.h:267 [inline]\n get_task_struct include/linux/sched/task.h:110 [inline]\n kthread_stop+0x34/0x1c0 kernel/kthread.c:703\n f2fs_stop_discard_thread+0x3c/0x5c fs/f2fs/segment.c:1638\n kill_f2fs_super+0x5c/0x194 fs/f2fs/super.c:4522\n deactivate_locked_super+0x70/0xe8 fs/super.c:332\n deactivate_super+0xd0/0xd4 fs/super.c:363\n cleanup_mnt+0x1f8/0x234 fs/namespace.c:1186\n __cleanup_mnt+0x20/0x30 fs/namespace.c:1193\n task_work_run+0xc4/0x14c kernel/task_work.c:177\n exit_task_work include/linux/task_work.h:38 [inline]\n do_exit+0x26c/0xbe0 kernel/exit.c:795\n do_group_exit+0x60/0xe8 kernel/exit.c:925\n __do_sys_exit_group kernel/exit.c:936 [inline]\n __se_sys_exit_group kernel/exit.c:934 [inline]\n __wake_up_parent+0x0/0x40 kernel/exit.c:934\n __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]\n invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]\n el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142\n do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206\n el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636\n el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654\n el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581\n\nThe root cause of this issue is in error path of f2fs_start_discard_thread(),\nit missed to invalidate dcc->f2fs_issue_discard, later kthread_stop() may\naccess invalid pointer."}], "id": "CVE-2022-50620", "lastModified": "2025-12-08T18:26:19.900", "metrics": {}, "published": "2025-12-08T02:15:47.870", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/865bb7b5a7deeb0e5afbd82381d52d38825dc64d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/91586ce0d39a05f88795aa8814fb99b1387236b3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a3e517a6ba695d683ee63615e1ea6e6b4c7d2732"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ae6c960a82c52c3bda5adc82d90643d6c12d308e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: f2fs: fix to invalidate dcc->f2fs_issue_discard in error path", "id": "2419853", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2419853"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nf2fs: fix to invalidate dcc->f2fs_issue_discard in error path\nSyzbot reports a NULL pointer dereference issue as below:\n__refcount_add include/linux/refcount.h:193 [inline]\n__refcount_inc include/linux/refcount.h:250 [inline]\nrefcount_inc include/linux/refcount.h:267 [inline]\nget_task_struct include/linux/sched/task.h:110 [inline]\nkthread_stop+0x34/0x1c0 kernel/kthread.c:703\nf2fs_stop_discard_thread+0x3c/0x5c fs/f2fs/segment.c:1638\nkill_f2fs_super+0x5c/0x194 fs/f2fs/super.c:4522\ndeactivate_locked_super+0x70/0xe8 fs/super.c:332\ndeactivate_super+0xd0/0xd4 fs/super.c:363\ncleanup_mnt+0x1f8/0x234 fs/namespace.c:1186\n__cleanup_mnt+0x20/0x30 fs/namespace.c:1193\ntask_work_run+0xc4/0x14c kernel/task_work.c:177\nexit_task_work include/linux/task_work.h:38 [inline]\ndo_exit+0x26c/0xbe0 kernel/exit.c:795\ndo_group_exit+0x60/0xe8 kernel/exit.c:925\n__do_sys_exit_group kernel/exit.c:936 [inline]\n__se_sys_exit_group kernel/exit.c:934 [inline]\n__wake_up_parent+0x0/0x40 kernel/exit.c:934\n__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]\ninvoke_syscall arch/arm64/kernel/syscall.c:52 [inline]\nel0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142\ndo_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206\nel0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636\nel0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654\nel0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581\nThe root cause of this issue is in error path of f2fs_start_discard_thread(),\nit missed to invalidate dcc->f2fs_issue_discard, later kthread_stop() may\naccess invalid pointer."], "name": "CVE-2022-50620", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50620\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50620\nhttps://lore.kernel.org/linux-cve-announce/2025120852-CVE-2022-50620-bf1f@gregkh/T"], "threat_severity": "Moderate"}

{}