{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-50555", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-07T15:15:38.669Z", "datePublished": "2025-10-07T15:21:16.179Z", "dateUpdated": "2026-05-11T19:21:41.347Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:21:41.347Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix a null-ptr-deref in tipc_topsrv_accept\n\nsyzbot found a crash in tipc_topsrv_accept:\n\n KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\n Workqueue: tipc_rcv tipc_topsrv_accept\n RIP: 0010:kernel_accept+0x22d/0x350 net/socket.c:3487\n Call Trace:\n <TASK>\n tipc_topsrv_accept+0x197/0x280 net/tipc/topsrv.c:460\n process_one_work+0x991/0x1610 kernel/workqueue.c:2289\n worker_thread+0x665/0x1080 kernel/workqueue.c:2436\n kthread+0x2e4/0x3a0 kernel/kthread.c:376\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n\nIt was caused by srv->listener that might be set to null by\ntipc_topsrv_stop() in net .exit whereas it's still used in\ntipc_topsrv_accept() worker.\n\nsrv->listener is protected by srv->idr_lock in tipc_topsrv_stop(), so add\na check for srv->listener under srv->idr_lock in tipc_topsrv_accept() to\navoid the null-ptr-deref. To ensure the lsock is not released during the\ntipc_topsrv_accept(), move sock_release() after tipc_topsrv_work_stop()\nwhere it's waiting until the tipc_topsrv_accept worker to be done.\n\nNote that sk_callback_lock is used to protect sk->sk_user_data instead of\nsrv->listener, and it should check srv in tipc_topsrv_listener_data_ready()\ninstead. This also ensures that no more tipc_topsrv_accept worker will be\nstarted after tipc_conn_close() is called in tipc_topsrv_stop() where it\nsets sk->sk_user_data to null."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/tipc/topsrv.c"], "versions": [{"version": "0ef897be12b8b4cf297b6016e79ec97ec90f2cf6", "lessThan": "ce69bdac2310152bb70845024d5d704c52aabfc3", "status": "affected", "versionType": "git"}, {"version": "0ef897be12b8b4cf297b6016e79ec97ec90f2cf6", "lessThan": "24b129aed8730e48f47d852d58d76825ab6f407c", "status": "affected", "versionType": "git"}, {"version": "0ef897be12b8b4cf297b6016e79ec97ec90f2cf6", "lessThan": "32a3d4660b34ce49ac0162338ebe362098e2f5df", "status": "affected", "versionType": "git"}, {"version": "0ef897be12b8b4cf297b6016e79ec97ec90f2cf6", "lessThan": "7a939503fc32bff4ed60800b73ff7fbb4aea2142", "status": "affected", "versionType": "git"}, {"version": "0ef897be12b8b4cf297b6016e79ec97ec90f2cf6", "lessThan": "cedb41664e27b2cae7e21487f1bee22dcd84037d", "status": "affected", "versionType": "git"}, {"version": "0ef897be12b8b4cf297b6016e79ec97ec90f2cf6", "lessThan": "82cb4e4612c633a9ce320e1773114875604a3cce", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/tipc/topsrv.c"], "versions": [{"version": "4.17", "status": "affected"}, {"version": "0", "lessThan": "4.17", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.264", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.223", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.153", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.77", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.7", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "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": "4.17", "versionEndExcluding": "4.19.264"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.4.223"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.10.153"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.15.77"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.0.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ce69bdac2310152bb70845024d5d704c52aabfc3"}, {"url": "https://git.kernel.org/stable/c/24b129aed8730e48f47d852d58d76825ab6f407c"}, {"url": "https://git.kernel.org/stable/c/32a3d4660b34ce49ac0162338ebe362098e2f5df"}, {"url": "https://git.kernel.org/stable/c/7a939503fc32bff4ed60800b73ff7fbb4aea2142"}, {"url": "https://git.kernel.org/stable/c/cedb41664e27b2cae7e21487f1bee22dcd84037d"}, {"url": "https://git.kernel.org/stable/c/82cb4e4612c633a9ce320e1773114875604a3cce"}], "title": "tipc: fix a null-ptr-deref in tipc_topsrv_accept", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: tipc: fix a null-ptr-deref in tipc_topsrv_accept", "id": "2402227", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2402227"}, "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": ["No description is available for this CVE."], "name": "CVE-2022-50555", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:rhivos:1", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50555\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50555\nhttps://lore.kernel.org/linux-cve-announce/2025100700-CVE-2022-50555-18e1@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-10-08T13:36:23.769296+00:00", "updated": "2025-10-08T13:36:23.769329+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}