{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49939", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-05-01T14:05:17.255Z", "datePublished": "2025-06-18T10:54:40.100Z", "dateUpdated": "2025-06-18T10:54:40.100Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-06-18T10:54:40.100Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix UAF of ref->proc caused by race condition\n\nA transaction of type BINDER_TYPE_WEAK_HANDLE can fail to increment the\nreference for a node. In this case, the target proc normally releases\nthe failed reference upon close as expected. However, if the target is\ndying in parallel the call will race with binder_deferred_release(), so\nthe target could have released all of its references by now leaving the\ncleanup of the new failed reference unhandled.\n\nThe transaction then ends and the target proc gets released making the\nref->proc now a dangling pointer. Later on, ref->node is closed and we\nattempt to take spin_lock(&ref->proc->inner_lock), which leads to the\nuse-after-free bug reported below. Let's fix this by cleaning up the\nfailed reference on the spot instead of relying on the target to do so.\n\n ==================================================================\n BUG: KASAN: use-after-free in _raw_spin_lock+0xa8/0x150\n Write of size 4 at addr ffff5ca207094238 by task kworker/1:0/590\n\n CPU: 1 PID: 590 Comm: kworker/1:0 Not tainted 5.19.0-rc8 #10\n Hardware name: linux,dummy-virt (DT)\n Workqueue: events binder_deferred_func\n Call trace:\n dump_backtrace.part.0+0x1d0/0x1e0\n show_stack+0x18/0x70\n dump_stack_lvl+0x68/0x84\n print_report+0x2e4/0x61c\n kasan_report+0xa4/0x110\n kasan_check_range+0xfc/0x1a4\n __kasan_check_write+0x3c/0x50\n _raw_spin_lock+0xa8/0x150\n binder_deferred_func+0x5e0/0x9b0\n process_one_work+0x38c/0x5f0\n worker_thread+0x9c/0x694\n kthread+0x188/0x190\n ret_from_fork+0x10/0x20"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/android/binder.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "229f47603dd306bc0eb1a831439adb8e48bb0eae", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "06e5b43ca4dab06a92bf4c2f33766e6fb11b880a", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "30d0901b307f27d36b2655fb3048cf31ee0e89c0", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9629f2dfdb1dad294b468038ff8e161e94d0b609", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c2a4b5dc8fa71af73bab704d0cac42ac39767ed6", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "603a47f2ae56bf68288784d3c0a8c5b8e0a827ed", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a0e44c64b6061dda7e00b7c458e4523e2331b739", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/android/binder.c"], "versions": [{"version": "4.14.293", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.258", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.213", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.142", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.66", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.8", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0", "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:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.14.293"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.19.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.4.213"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.10.142"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.15.66"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.19.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/229f47603dd306bc0eb1a831439adb8e48bb0eae"}, {"url": "https://git.kernel.org/stable/c/06e5b43ca4dab06a92bf4c2f33766e6fb11b880a"}, {"url": "https://git.kernel.org/stable/c/30d0901b307f27d36b2655fb3048cf31ee0e89c0"}, {"url": "https://git.kernel.org/stable/c/9629f2dfdb1dad294b468038ff8e161e94d0b609"}, {"url": "https://git.kernel.org/stable/c/c2a4b5dc8fa71af73bab704d0cac42ac39767ed6"}, {"url": "https://git.kernel.org/stable/c/603a47f2ae56bf68288784d3c0a8c5b8e0a827ed"}, {"url": "https://git.kernel.org/stable/c/a0e44c64b6061dda7e00b7c458e4523e2331b739"}], "title": "binder: fix UAF of ref->proc caused by race condition", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix UAF of ref->proc caused by race condition\n\nA transaction of type BINDER_TYPE_WEAK_HANDLE can fail to increment the\nreference for a node. In this case, the target proc normally releases\nthe failed reference upon close as expected. However, if the target is\ndying in parallel the call will race with binder_deferred_release(), so\nthe target could have released all of its references by now leaving the\ncleanup of the new failed reference unhandled.\n\nThe transaction then ends and the target proc gets released making the\nref->proc now a dangling pointer. Later on, ref->node is closed and we\nattempt to take spin_lock(&ref->proc->inner_lock), which leads to the\nuse-after-free bug reported below. Let's fix this by cleaning up the\nfailed reference on the spot instead of relying on the target to do so.\n\n ==================================================================\n BUG: KASAN: use-after-free in _raw_spin_lock+0xa8/0x150\n Write of size 4 at addr ffff5ca207094238 by task kworker/1:0/590\n\n CPU: 1 PID: 590 Comm: kworker/1:0 Not tainted 5.19.0-rc8 #10\n Hardware name: linux,dummy-virt (DT)\n Workqueue: events binder_deferred_func\n Call trace:\n dump_backtrace.part.0+0x1d0/0x1e0\n show_stack+0x18/0x70\n dump_stack_lvl+0x68/0x84\n print_report+0x2e4/0x61c\n kasan_report+0xa4/0x110\n kasan_check_range+0xfc/0x1a4\n __kasan_check_write+0x3c/0x50\n _raw_spin_lock+0xa8/0x150\n binder_deferred_func+0x5e0/0x9b0\n process_one_work+0x38c/0x5f0\n worker_thread+0x9c/0x694\n kthread+0x188/0x190\n ret_from_fork+0x10/0x20"}], "id": "CVE-2022-49939", "lastModified": "2025-06-18T13:46:52.973", "metrics": {}, "published": "2025-06-18T11:15:20.793", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/06e5b43ca4dab06a92bf4c2f33766e6fb11b880a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/229f47603dd306bc0eb1a831439adb8e48bb0eae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/30d0901b307f27d36b2655fb3048cf31ee0e89c0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/603a47f2ae56bf68288784d3c0a8c5b8e0a827ed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9629f2dfdb1dad294b468038ff8e161e94d0b609"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a0e44c64b6061dda7e00b7c458e4523e2331b739"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c2a4b5dc8fa71af73bab704d0cac42ac39767ed6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: binder: fix UAF of ref->proc caused by race condition", "id": "2373400", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373400"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbinder: fix UAF of ref->proc caused by race condition\nA transaction of type BINDER_TYPE_WEAK_HANDLE can fail to increment the\nreference for a node. In this case, the target proc normally releases\nthe failed reference upon close as expected. However, if the target is\ndying in parallel the call will race with binder_deferred_release(), so\nthe target could have released all of its references by now leaving the\ncleanup of the new failed reference unhandled.\nThe transaction then ends and the target proc gets released making the\nref->proc now a dangling pointer. Later on, ref->node is closed and we\nattempt to take spin_lock(&ref->proc->inner_lock), which leads to the\nuse-after-free bug reported below. Let's fix this by cleaning up the\nfailed reference on the spot instead of relying on the target to do so.\n==================================================================\nBUG: KASAN: use-after-free in _raw_spin_lock+0xa8/0x150\nWrite of size 4 at addr ffff5ca207094238 by task kworker/1:0/590\nCPU: 1 PID: 590 Comm: kworker/1:0 Not tainted 5.19.0-rc8 #10\nHardware name: linux,dummy-virt (DT)\nWorkqueue: events binder_deferred_func\nCall trace:\ndump_backtrace.part.0+0x1d0/0x1e0\nshow_stack+0x18/0x70\ndump_stack_lvl+0x68/0x84\nprint_report+0x2e4/0x61c\nkasan_report+0xa4/0x110\nkasan_check_range+0xfc/0x1a4\n__kasan_check_write+0x3c/0x50\n_raw_spin_lock+0xa8/0x150\nbinder_deferred_func+0x5e0/0x9b0\nprocess_one_work+0x38c/0x5f0\nworker_thread+0x9c/0x694\nkthread+0x188/0x190\nret_from_fork+0x10/0x20"], "name": "CVE-2022-49939", "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": "2025-06-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49939\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49939\nhttps://lore.kernel.org/linux-cve-announce/2025061848-CVE-2022-49939-f8be@gregkh/T"], "threat_severity": "Moderate"}