{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-50409", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:53:07.001Z", "datePublished": "2025-09-18T16:03:53.902Z", "dateUpdated": "2026-05-11T19:18:56.170Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:18:56.170Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: If sock is dead don't access sock's sk_wq in sk_stream_wait_memory\n\nFixes the below NULL pointer dereference:\n\n [...]\n [ 14.471200] Call Trace:\n [ 14.471562] <TASK>\n [ 14.471882] lock_acquire+0x245/0x2e0\n [ 14.472416] ? remove_wait_queue+0x12/0x50\n [ 14.473014] ? _raw_spin_lock_irqsave+0x17/0x50\n [ 14.473681] _raw_spin_lock_irqsave+0x3d/0x50\n [ 14.474318] ? remove_wait_queue+0x12/0x50\n [ 14.474907] remove_wait_queue+0x12/0x50\n [ 14.475480] sk_stream_wait_memory+0x20d/0x340\n [ 14.476127] ? do_wait_intr_irq+0x80/0x80\n [ 14.476704] do_tcp_sendpages+0x287/0x600\n [ 14.477283] tcp_bpf_push+0xab/0x260\n [ 14.477817] tcp_bpf_sendmsg_redir+0x297/0x500\n [ 14.478461] ? __local_bh_enable_ip+0x77/0xe0\n [ 14.479096] tcp_bpf_send_verdict+0x105/0x470\n [ 14.479729] tcp_bpf_sendmsg+0x318/0x4f0\n [ 14.480311] sock_sendmsg+0x2d/0x40\n [ 14.480822] ____sys_sendmsg+0x1b4/0x1c0\n [ 14.481390] ? copy_msghdr_from_user+0x62/0x80\n [ 14.482048] ___sys_sendmsg+0x78/0xb0\n [ 14.482580] ? vmf_insert_pfn_prot+0x91/0x150\n [ 14.483215] ? __do_fault+0x2a/0x1a0\n [ 14.483738] ? do_fault+0x15e/0x5d0\n [ 14.484246] ? __handle_mm_fault+0x56b/0x1040\n [ 14.484874] ? lock_is_held_type+0xdf/0x130\n [ 14.485474] ? find_held_lock+0x2d/0x90\n [ 14.486046] ? __sys_sendmsg+0x41/0x70\n [ 14.486587] __sys_sendmsg+0x41/0x70\n [ 14.487105] ? intel_pmu_drain_pebs_core+0x350/0x350\n [ 14.487822] do_syscall_64+0x34/0x80\n [ 14.488345] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n [...]\n\nThe test scenario has the following flow:\n\nthread1 thread2\n----------- ---------------\n tcp_bpf_sendmsg\n tcp_bpf_send_verdict\n tcp_bpf_sendmsg_redir sock_close\n tcp_bpf_push_locked __sock_release\n tcp_bpf_push //inet_release\n do_tcp_sendpages sock->ops->release\n sk_stream_wait_memory \t // tcp_close\n sk_wait_event sk->sk_prot->close\n release_sock(__sk);\n ***\n lock_sock(sk);\n __tcp_close\n sock_orphan(sk)\n sk->sk_wq = NULL\n release_sock\n ****\n lock_sock(__sk);\n remove_wait_queue(sk_sleep(sk), &wait);\n sk_sleep(sk)\n //NULL pointer dereference\n &rcu_dereference_raw(sk->sk_wq)->wait\n\nWhile waiting for memory in thread1, the socket is released with its wait\nqueue because thread2 has closed it. This caused by tcp_bpf_send_verdict\ndidn't increase the f_count of psock->sk_redir->sk_socket->file in thread1.\n\nWe should check if SOCK_DEAD flag is set on wakeup in sk_stream_wait_memory\nbefore accessing the wait queue."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/stream.c"], "versions": [{"version": "604326b41a6fb9b4a78b6179335decee0365cd8c", "lessThan": "a76462dbdd8bddcbeec9463bc9e54e509b860762", "status": "affected", "versionType": "git"}, {"version": "604326b41a6fb9b4a78b6179335decee0365cd8c", "lessThan": "65029aaedd15d9fe5ea1a899134e236d83f627bb", "status": "affected", "versionType": "git"}, {"version": "604326b41a6fb9b4a78b6179335decee0365cd8c", "lessThan": "124b7c773271f06af5a2cea694b283cdb5275cf5", "status": "affected", "versionType": "git"}, {"version": "604326b41a6fb9b4a78b6179335decee0365cd8c", "lessThan": "35f5e70bdfa7432762ac4ffa75e5a7574ac5563e", "status": "affected", "versionType": "git"}, {"version": "604326b41a6fb9b4a78b6179335decee0365cd8c", "lessThan": "435f5aa4421782af197b98d8525263977be4af5c", "status": "affected", "versionType": "git"}, {"version": "604326b41a6fb9b4a78b6179335decee0365cd8c", "lessThan": "3f8ef65af927db247418d4e1db49164d7a158fc5", "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/core/stream.c"], "versions": [{"version": "4.20", "status": "affected"}, {"version": "0", "lessThan": "4.20", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.220", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.150", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.75", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.17", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.3", "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": "4.20", "versionEndExcluding": "5.4.220"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.10.150"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.15.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.19.17"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.0.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a76462dbdd8bddcbeec9463bc9e54e509b860762"}, {"url": "https://git.kernel.org/stable/c/65029aaedd15d9fe5ea1a899134e236d83f627bb"}, {"url": "https://git.kernel.org/stable/c/124b7c773271f06af5a2cea694b283cdb5275cf5"}, {"url": "https://git.kernel.org/stable/c/35f5e70bdfa7432762ac4ffa75e5a7574ac5563e"}, {"url": "https://git.kernel.org/stable/c/435f5aa4421782af197b98d8525263977be4af5c"}, {"url": "https://git.kernel.org/stable/c/3f8ef65af927db247418d4e1db49164d7a158fc5"}], "title": "net: If sock is dead don't access sock's sk_wq in sk_stream_wait_memory", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C71AA4D8-A0D5-45D7-A420-247193B5BED7", "versionEndExcluding": "4.14.296", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D6B62970-1FAD-4ED6-930A-23E26A8D2E08", "versionEndExcluding": "4.19.262", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "125F7133-B3B7-4175-8CF3-FF0845483254", "versionEndExcluding": "5.4.220", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C495821C-2A71-4F09-BED8-6A6EB4C9BA27", "versionEndExcluding": "5.10.150", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6D945F46-F32F-4C09-8400-C3477E22A9FB", "versionEndExcluding": "5.15.75", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "19B4C3A4-E5C3-41DC-BB14-BE72858E7D35", "versionEndExcluding": "5.19.17", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5BCD8201-B847-4442-B894-70D430128DEF", "versionEndExcluding": "6.0.3", "versionStartIncluding": "6.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: If sock is dead don't access sock's sk_wq in sk_stream_wait_memory\n\nFixes the below NULL pointer dereference:\n\n [...]\n [ 14.471200] Call Trace:\n [ 14.471562] <TASK>\n [ 14.471882] lock_acquire+0x245/0x2e0\n [ 14.472416] ? remove_wait_queue+0x12/0x50\n [ 14.473014] ? _raw_spin_lock_irqsave+0x17/0x50\n [ 14.473681] _raw_spin_lock_irqsave+0x3d/0x50\n [ 14.474318] ? remove_wait_queue+0x12/0x50\n [ 14.474907] remove_wait_queue+0x12/0x50\n [ 14.475480] sk_stream_wait_memory+0x20d/0x340\n [ 14.476127] ? do_wait_intr_irq+0x80/0x80\n [ 14.476704] do_tcp_sendpages+0x287/0x600\n [ 14.477283] tcp_bpf_push+0xab/0x260\n [ 14.477817] tcp_bpf_sendmsg_redir+0x297/0x500\n [ 14.478461] ? __local_bh_enable_ip+0x77/0xe0\n [ 14.479096] tcp_bpf_send_verdict+0x105/0x470\n [ 14.479729] tcp_bpf_sendmsg+0x318/0x4f0\n [ 14.480311] sock_sendmsg+0x2d/0x40\n [ 14.480822] ____sys_sendmsg+0x1b4/0x1c0\n [ 14.481390] ? copy_msghdr_from_user+0x62/0x80\n [ 14.482048] ___sys_sendmsg+0x78/0xb0\n [ 14.482580] ? vmf_insert_pfn_prot+0x91/0x150\n [ 14.483215] ? __do_fault+0x2a/0x1a0\n [ 14.483738] ? do_fault+0x15e/0x5d0\n [ 14.484246] ? __handle_mm_fault+0x56b/0x1040\n [ 14.484874] ? lock_is_held_type+0xdf/0x130\n [ 14.485474] ? find_held_lock+0x2d/0x90\n [ 14.486046] ? __sys_sendmsg+0x41/0x70\n [ 14.486587] __sys_sendmsg+0x41/0x70\n [ 14.487105] ? intel_pmu_drain_pebs_core+0x350/0x350\n [ 14.487822] do_syscall_64+0x34/0x80\n [ 14.488345] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n [...]\n\nThe test scenario has the following flow:\n\nthread1 thread2\n----------- ---------------\n tcp_bpf_sendmsg\n tcp_bpf_send_verdict\n tcp_bpf_sendmsg_redir sock_close\n tcp_bpf_push_locked __sock_release\n tcp_bpf_push //inet_release\n do_tcp_sendpages sock->ops->release\n sk_stream_wait_memory \t // tcp_close\n sk_wait_event sk->sk_prot->close\n release_sock(__sk);\n ***\n lock_sock(sk);\n __tcp_close\n sock_orphan(sk)\n sk->sk_wq = NULL\n release_sock\n ****\n lock_sock(__sk);\n remove_wait_queue(sk_sleep(sk), &wait);\n sk_sleep(sk)\n //NULL pointer dereference\n &rcu_dereference_raw(sk->sk_wq)->wait\n\nWhile waiting for memory in thread1, the socket is released with its wait\nqueue because thread2 has closed it. This caused by tcp_bpf_send_verdict\ndidn't increase the f_count of psock->sk_redir->sk_socket->file in thread1.\n\nWe should check if SOCK_DEAD flag is set on wakeup in sk_stream_wait_memory\nbefore accessing the wait queue."}], "id": "CVE-2022-50409", "lastModified": "2025-12-23T14:16:35.947", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-09-18T16:15:44.133", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/124b7c773271f06af5a2cea694b283cdb5275cf5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/35f5e70bdfa7432762ac4ffa75e5a7574ac5563e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3f8ef65af927db247418d4e1db49164d7a158fc5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/435f5aa4421782af197b98d8525263977be4af5c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/65029aaedd15d9fe5ea1a899134e236d83f627bb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a76462dbdd8bddcbeec9463bc9e54e509b860762"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net: If sock is dead don't access sock's sk_wq in sk_stream_wait_memory", "id": "2396502", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2396502"}, "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": ["No description is available for this CVE."], "name": "CVE-2022-50409", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50409\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50409\nhttps://lore.kernel.org/linux-cve-announce/2025091853-CVE-2022-50409-d7dc@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-09-19T09:35:40.918899+00:00", "updated": "2025-09-19T09:35:40.918966+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}