CVE-2022-49931

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The following signature is seen:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000030\n [...]\n Call Trace:\n sc_disable+0x1ba/0x240 [hfi1]\n pio_freeze+0x3d/0x60 [hfi1]\n handle_freeze+0x27/0x1b0 [hfi1]\n process_one_work+0x1b0/0x380\n ? process_one_work+0x380/0x380\n worker_thread+0x30/0x360\n ? process_one_work+0x380/0x380\n kthread+0xd7/0x100\n ? kthread_complete_and_exit+0x20/0x20\n ret_from_fork+0x1f/0x30\n\nThe fix is to use the correct call to move the list."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - The crash path runs from fabric link-down/freeze handling (SubnSet PortInfo \u2192 set_link_state \u2192 start_freeze_handling \u2192 pio_freeze \u2192 sc_disable). An adjacent Omni-Path/IB peer or subnet manager can drive that link-down without local login on the victim.\nAC:L - The attacker controls the link-down/MAD side, and under normal RDMA/IPoIB load kernel send contexts commonly have non-empty piowait lists; repeating a fabric bounce makes hitting the buggy sc_disable path reliable.\nPR:N - Triggering via fabric management/link-down requires no credentials on the victim host; when M_Key is unset (common default), SubnSet PortInfo is accepted from the adjacent fabric without local privileges.\nUI:N - No victim user action is required; the adjacent attacker\u2019s link-down/MAD alone exercises the freeze workqueue path.\nS:U - Impact is confined to the host kernel hfi1 driver (oops or heap corruption) and does not cross a VM, IOMMU, or other security-authority boundary.\nC:H - list_move on the list head causes type confusion so iowait_to_qp() reads a fabricated owner pointer from heap memory far past send_context, an out-of-bounds read that can disclose/reclaim kernel data when groomed.\nI:H - The same type confusion feeds list_del_init() and hfi1_qp_wakeup() through the derived qp/priv pointers, yielding classic list-unlink / wild-pointer write and control-flow corruption primitives.\nA:H - The demonstrated outcome is a kernel NULL pointer dereference oops in sc_disable during freeze handling, which can panic the host (panic_on_oops) or otherwise take it down."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/hw/hfi1/pio.c"], "versions": [{"version": "d997d4e4365f7e59cf6b59c70f966c56d704b64f", "lessThan": "25760a41e3802f54aadcc31385543665ab349b8e", "status": "affected", "versionType": "git"}, {"version": "d98883f6c33e0d960afedcecaa92fc2b61fec383", "lessThan": "7c4260f8f188df32414a5ecad63e8b934c2aa3f0", "status": "affected", "versionType": "git"}, {"version": "13bac861952a78664907a0f927d3e874e9a59034", "lessThan": "ba95409d6b580501ff6d78efd00064f7df669926", "status": "affected", "versionType": "git"}, {"version": "13bac861952a78664907a0f927d3e874e9a59034", "lessThan": "b8bcff99b07cc175a6ee12a52db51cdd2229586c", "status": "affected", "versionType": "git"}, {"version": "13bac861952a78664907a0f927d3e874e9a59034", "lessThan": "1afac08b39d85437187bb2a92d89a741b1078f55", "status": "affected", "versionType": "git"}, {"version": "5d33bd6b4d4d035e42733592899918a18f2540da", "status": "affected", "versionType": "git"}, {"version": "5.4.157", "lessThan": "5.4.224", "status": "affected", "versionType": "semver"}, {"version": "5.10.77", "lessThan": "5.10.154", "status": "affected", "versionType": "semver"}, {"version": "5.14.16", "lessThan": "5.15", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", 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"https://git.kernel.org/stable/c/b8bcff99b07cc175a6ee12a52db51cdd2229586c"}, {"url": "https://git.kernel.org/stable/c/1afac08b39d85437187bb2a92d89a741b1078f55"}], "title": "IB/hfi1: Correctly move list in sc_disable()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-476", "lang": "en", "description": "CWE-476 NULL Pointer Dereference"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2025-10-01T14:55:37.542549Z", "id": "CVE-2022-49931", "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": "2025-10-01T14:55:40.268Z"}}]}}

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The\nresult is a kernel crash.\n\nThe crash is triggered when a link goes down and there are waiters for a\nsend to complete. The following signature is seen:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000030\n [...]\n Call Trace:\n sc_disable+0x1ba/0x240 [hfi1]\n pio_freeze+0x3d/0x60 [hfi1]\n handle_freeze+0x27/0x1b0 [hfi1]\n process_one_work+0x1b0/0x380\n ? process_one_work+0x380/0x380\n worker_thread+0x30/0x360\n ? process_one_work+0x380/0x380\n kthread+0xd7/0x100\n ? kthread_complete_and_exit+0x20/0x20\n ret_from_fork+0x1f/0x30\n\nThe fix is to use the correct call to move the list."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.224", "versionStartIncluding": "5.4.157"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.154", "versionStartIncluding": "5.10.77"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.78", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.0.8", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.14.16"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:23:16.586Z"}}}, "cveMetadata": {"cveId": "CVE-2022-49931", "state": "PUBLISHED", "dateUpdated": "2026-05-23T15:23:16.586Z", "dateReserved": "2025-05-01T14:05:17.254Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-05-01T14:11:08.135Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/hfi1/pio.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "25760a41e3802f54aadcc31385543665ab349b8e", "status": "affected", "version": "d997d4e4365f7e59cf6b59c70f966c56d704b64f", "versionType": "git"}, {"lessThan": "7c4260f8f188df32414a5ecad63e8b934c2aa3f0", "status": "affected", "version": "d98883f6c33e0d960afedcecaa92fc2b61fec383", "versionType": "git"}, {"lessThan": "ba95409d6b580501ff6d78efd00064f7df669926", "status": "affected", "version": "13bac861952a78664907a0f927d3e874e9a59034", "versionType": "git"}, {"lessThan": "b8bcff99b07cc175a6ee12a52db51cdd2229586c", "status": "affected", "version": "13bac861952a78664907a0f927d3e874e9a59034", "versionType": "git"}, {"lessThan": "1afac08b39d85437187bb2a92d89a741b1078f55", "status": "affected", "version": "13bac861952a78664907a0f927d3e874e9a59034", "versionType": "git"}, {"status": "affected", "version": "5d33bd6b4d4d035e42733592899918a18f2540da", "versionType": "git"}, {"lessThan": "5.4.224", "status": "affected", "version": "5.4.157", "versionType": "semver"}, {"lessThan": "5.10.154", "status": "affected", "version": "5.10.77", "versionType": "semver"}, {"lessThan": "5.15", "status": "affected", "version": "5.14.16", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/hfi1/pio.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"lessThan": "5.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.224", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.154", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.78", "versionType": "semver"}, {"lessThanOrEqual": "6.0.*", "status": "unaffected", "version": "6.0.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BDFAB6A5-9A63-4F7C-919F-15F161381091", "versionEndExcluding": "5.4.224", "versionStartIncluding": "5.4.157", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C395A4B6-7D4C-4782-A571-27F4A03657B8", "versionEndExcluding": "5.10.154", "versionStartIncluding": "5.10.77", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BCEFCD80-1AE5-488A-B899-FCA4D6012958", "versionEndExcluding": "5.15.78", "versionStartIncluding": "5.14.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "EC9A754E-625D-42F3-87A7-960D643E2867", "versionEndExcluding": "6.0.8", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*", "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*", "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/hfi1: Correctly move list in sc_disable()\n\nCommit 13bac861952a (\"IB/hfi1: Fix abba locking issue with sc_disable()\")\nincorrectly tries to move a list from one list head to another. The\nresult is a kernel crash.\n\nThe crash is triggered when a link goes down and there are waiters for a\nsend to complete. The following signature is seen:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000030\n [...]\n Call Trace:\n sc_disable+0x1ba/0x240 [hfi1]\n pio_freeze+0x3d/0x60 [hfi1]\n handle_freeze+0x27/0x1b0 [hfi1]\n process_one_work+0x1b0/0x380\n ? process_one_work+0x380/0x380\n worker_thread+0x30/0x360\n ? process_one_work+0x380/0x380\n kthread+0xd7/0x100\n ? kthread_complete_and_exit+0x20/0x20\n ret_from_fork+0x1f/0x30\n\nThe fix is to use the correct call to move the list."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: IB/hfi1: Mover correctamente la lista en sc_disable(). El commit 13bac861952a (\"IB/hfi1: Solucionar el problema de bloqueo de abba con sc_disable()\") intenta mover incorrectamente una lista de una cabecera a otra. Esto provoca un fallo del kernel. El fallo se activa cuando un enlace se cae y hay esperas para que se complete un env\u00edo. Se observa la siguiente firma: ERROR: desreferencia de puntero nulo del kernel, direcci\u00f3n: 000000000000030 [...] Seguimiento de llamadas: sc_disable+0x1ba/0x240 [hfi1] pio_freeze+0x3d/0x60 [hfi1] handle_freeze+0x27/0x1b0 [hfi1] process_one_work+0x1b0/0x380 ? process_one_work+0x380/0x380 worker_thread+0x30/0x360 ? process_one_work+0x380/0x380 kthread+0xd7/0x100 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x1f/0x30 La soluci\u00f3n es utilizar la llamada correcta para mover la lista."}], "id": "CVE-2022-49931", "lastModified": "2026-08-04T10:17:59.820", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"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"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49931", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T14:55:37.542549Z", "version": "2.0.3"}}]}, "published": "2025-05-01T15:16:19.087", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1afac08b39d85437187bb2a92d89a741b1078f55"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/25760a41e3802f54aadcc31385543665ab349b8e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7c4260f8f188df32414a5ecad63e8b934c2aa3f0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b8bcff99b07cc175a6ee12a52db51cdd2229586c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ba95409d6b580501ff6d78efd00064f7df669926"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: IB/hfi1: Correctly move list in sc_disable()", "id": "2363406", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363406"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nIB/hfi1: Correctly move list in sc_disable()\nCommit 13bac861952a (\"IB/hfi1: Fix abba locking issue with sc_disable()\")\nincorrectly tries to move a list from one list head to another. The\nresult is a kernel crash.\nThe crash is triggered when a link goes down and there are waiters for a\nsend to complete. The following signature is seen:\nBUG: kernel NULL pointer dereference, address: 0000000000000030\n[...]\nCall Trace:\nsc_disable+0x1ba/0x240 [hfi1]\npio_freeze+0x3d/0x60 [hfi1]\nhandle_freeze+0x27/0x1b0 [hfi1]\nprocess_one_work+0x1b0/0x380\n? process_one_work+0x380/0x380\nworker_thread+0x30/0x360\n? process_one_work+0x380/0x380\nkthread+0xd7/0x100\n? kthread_complete_and_exit+0x20/0x20\nret_from_fork+0x1f/0x30\nThe fix is to use the correct call to move the list."], "name": "CVE-2022-49931", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "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": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49931\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49931\nhttps://lore.kernel.org/linux-cve-announce/2025050112-CVE-2022-49931-9e35@gregkh/T"], "statement": "A bug in sc_disable() of the hfi1 InfiniBand driver could lead to a kernel NULL pointer dereference when the link goes down with pending waiters. The issue is caused by incorrect list manipulation, resulting in a crash due to dereferencing a NULL list pointer. Only privileged users can trigger this by manipulating InfiniBand links or contexts.", "threat_severity": "Moderate"}

{}