CVE-2022-50329

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it is reached via process exit/syscalls, not network or physical input.\nAC:L - An unprivileged attacker fully controls triggering by performing I/O then exiting so the process ref drops and bfq_put_queue frees bfqq before bic_set_bfqq; BFQ is commonly enabled (e.g. Android/desktops), so success does not depend on conditions outside attacker control.\nPR:L - Any unprivileged local user can open/write files on a BFQ-backed filesystem and exit; no capabilities or root are required along the exit_io_context \u2192 bfq_exit_icq path.\nUI:N - Exploitation needs only the attacker's own I/O and process exit; no victim action is required.\nS:U - This is a standard in-kernel heap UAF enabling privilege escalation within the same kernel security authority, not a VM/IOMMU/sandbox boundary cross.\nC:H - Use-after-free of struct bfq_queue lets an attacker reclaim and control the freed object, enabling arbitrary kernel memory disclosure primitives.\nI:H - bic_set_bfqq writes old_bfqq->bic on the freed object; with heap spray this yields a write primitive suitable for control-flow hijacking or arbitrary kernel modification.\nA:H - The UAF can oops/panic the kernel on access to freed bfqq memory even without full exploitation, so availability impact is high."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/bfq-iosched.c"], "versions": [{"version": "5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a", "lessThan": "1425f1bb5df5239021fd09ebc2a5e8070e705d36", "status": "affected", "versionType": "git"}, {"version": "094f3d9314d67691cb21ba091c1b528f6e3c4893", "lessThan": "7949b0df3dd9f4817ed4a4e989fa9ee81df6205f", "status": "affected", "versionType": "git"}, {"version": "b22fd72bfebda3956efc4431b60ddfc0a51e03e0", "lessThan": "cfe5b38c37720313eff0dec5517442c7ab3c9a20", "status": "affected", "versionType": "git"}, {"version": "761564d93c8265f65543acf0a576b32d66bfa26a", "lessThan": "1ed959fef5b1c6f1a7a3fbea543698c30ebd6678", "status": "affected", "versionType": "git"}, {"version": "64dc8c732f5c2b406cc752e6aaa1bd5471159cab", "lessThan": "246cf66e300b76099b5dbd3fdd39e9a5dbc53f02", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/bfq-iosched.c"], "versions": [{"version": "5.15.86", "lessThan": "5.15.87", "status": "affected", "versionType": "semver"}, {"version": "6.0.16", "lessThan": "6.0.17", "status": "affected", "versionType": "semver"}, {"version": "6.1.2", "lessThan": "6.1.3", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.86", "versionEndExcluding": "5.15.87"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0.16", "versionEndExcluding": "6.0.17"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.2", "versionEndExcluding": "6.1.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1425f1bb5df5239021fd09ebc2a5e8070e705d36"}, {"url": "https://git.kernel.org/stable/c/7949b0df3dd9f4817ed4a4e989fa9ee81df6205f"}, {"url": "https://git.kernel.org/stable/c/cfe5b38c37720313eff0dec5517442c7ab3c9a20"}, {"url": "https://git.kernel.org/stable/c/1ed959fef5b1c6f1a7a3fbea543698c30ebd6678"}, {"url": "https://git.kernel.org/stable/c/246cf66e300b76099b5dbd3fdd39e9a5dbc53f02"}], "title": "block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-50329", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:31:01.622731Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:31:20.243Z"}}]}}

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BFQ is commonly enabled (e.g. Android/desktops), so success does not depend on conditions outside attacker control.\nPR:L - Any unprivileged local user can open/write files on a BFQ-backed filesystem and exit; no capabilities or root are required along the exit_io_context \u2192 bfq_exit_icq path.\nUI:N - Exploitation needs only the attacker's own I/O and process exit; no victim action is required.\nS:U - This is a standard in-kernel heap UAF enabling privilege escalation within the same kernel security authority, not a VM/IOMMU/sandbox boundary cross.\nC:H - Use-after-free of struct bfq_queue lets an attacker reclaim and control the freed object, enabling arbitrary kernel memory disclosure primitives.\nI:H - bic_set_bfqq writes old_bfqq->bic on the freed object; with heap spray this yields a write primitive suitable for control-flow hijacking or arbitrary kernel modification.\nA:H - The UAF can oops/panic the kernel on access to freed bfqq memory even without full exploitation, so availability impact is high."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a", "lessThan": "1425f1bb5df5239021fd09ebc2a5e8070e705d36", "versionType": "git"}, {"status": "affected", "version": "094f3d9314d67691cb21ba091c1b528f6e3c4893", "lessThan": "7949b0df3dd9f4817ed4a4e989fa9ee81df6205f", "versionType": "git"}, {"status": "affected", "version": "b22fd72bfebda3956efc4431b60ddfc0a51e03e0", "lessThan": "cfe5b38c37720313eff0dec5517442c7ab3c9a20", "versionType": "git"}, {"status": "affected", "version": "761564d93c8265f65543acf0a576b32d66bfa26a", "lessThan": "1ed959fef5b1c6f1a7a3fbea543698c30ebd6678", "versionType": "git"}, {"status": "affected", "version": "64dc8c732f5c2b406cc752e6aaa1bd5471159cab", "lessThan": "246cf66e300b76099b5dbd3fdd39e9a5dbc53f02", "versionType": "git"}], "programFiles": ["block/bfq-iosched.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.15.86", "lessThan": "5.15.87", "versionType": "semver"}, {"status": "affected", "version": "6.0.16", "lessThan": "6.0.17", "versionType": "semver"}, {"status": "affected", "version": "6.1.2", "lessThan": "6.1.3", "versionType": "semver"}], "programFiles": ["block/bfq-iosched.c"], "defaultStatus": "unaffected"}], "references": [{"url": "https://git.kernel.org/stable/c/1425f1bb5df5239021fd09ebc2a5e8070e705d36"}, {"url": "https://git.kernel.org/stable/c/7949b0df3dd9f4817ed4a4e989fa9ee81df6205f"}, {"url": "https://git.kernel.org/stable/c/cfe5b38c37720313eff0dec5517442c7ab3c9a20"}, {"url": "https://git.kernel.org/stable/c/1ed959fef5b1c6f1a7a3fbea543698c30ebd6678"}, {"url": "https://git.kernel.org/stable/c/246cf66e300b76099b5dbd3fdd39e9a5dbc53f02"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq\n\nCommit 64dc8c732f5c (\"block, bfq: fix possible uaf for 'bfqq->bic'\")\nwill access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq()\ncan free bfqq first, and then call bic_set_bfqq(), which will cause uaf.\n\nFix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq()."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.87", "versionStartIncluding": "5.15.86"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.0.17", "versionStartIncluding": "6.0.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.3", "versionStartIncluding": "6.1.2"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:58:13.157Z"}}}, "cveMetadata": {"cveId": "CVE-2022-50329", "state": "PUBLISHED", "dateUpdated": "2026-10-15T21:31:20.243Z", "dateReserved": "2025-09-15T14:18:36.815Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-09-15T14:49:32.123Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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"versionType": "git"}]}, {"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["block/bfq-iosched.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "5.15.87", "status": "affected", "version": "5.15.86", "versionType": "semver"}, {"lessThan": "6.0.17", "status": "affected", "version": "6.0.16", "versionType": "semver"}, {"lessThan": "6.1.3", "status": "affected", "version": "6.1.2", "versionType": "semver"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:5.15.86:*:*:*:*:*:*:*", "matchCriteriaId": "565709DF-CD9E-45F6-8BAB-1CDEBC2D14F9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.0.16:*:*:*:*:*:*:*", "matchCriteriaId": "0F12ACFA-7194-43FD-B79A-93AEA2668E6F", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1.2:*:*:*:*:*:*:*", "matchCriteriaId": "4A1A2CF8-ACB8-4475-B530-92ECBB0ADBF0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*", "matchCriteriaId": "FF501633-2F44-4913-A8EE-B021929F49F6", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq\n\nCommit 64dc8c732f5c (\"block, bfq: fix possible uaf for 'bfqq->bic'\")\nwill access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq()\ncan free bfqq first, and then call bic_set_bfqq(), which will cause uaf.\n\nFix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq()."}], "id": "CVE-2022-50329", "lastModified": "2026-10-15T22:17:30.263", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-50329", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": 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[{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq", "id": "2395242", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395242"}, "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-2022-50329", "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": "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": "2025-09-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50329\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50329\nhttps://lore.kernel.org/linux-cve-announce/2025091554-CVE-2022-50329-58ac@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-09-17T10:06:55.973138+00:00", "updated": "2025-09-17T10:06:55.973182+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}