CVE-2024-50174

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However there\nis still a race between retrieving the pointer from the XArray and\nincrementing the reference count.\n\nTo avoid this race simply hold the internal XArray lock when\nincrementing the reference count, this ensures there cannot be a racing\ncall to xa_erase()."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable code is reached only through DRM ioctls (`GROUP_SUBMIT`, `GROUP_GET_STATE`, `GROUP_DESTROY`) issued on the panthor render node `/dev/dri/renderD*`. This requires local access to the device file; there is no network or remote path.\nAC:L - The attacker controls both sides of the race \u2014 one thread calls GROUP_SUBMIT/GROUP_GET_STATE while another calls GROUP_DESTROY on the same handle and the same drm_file \u2014 and the create/destroy/submit loop is cheap enough to retry indefinitely until the window between `xa_load()` and `kref_get()` is hit. No condition depends on anything outside the attacker's control.\nPR:L - All panthor group ioctls are tagged `DRM_RENDER_ALLOW` with no capability check, so any unprivileged local user with render-node access can reach them; on Android and Chromebook-class Mali CSF devices that is every application. Only a basic local account is needed, not root.\nUI:N - The attacker's own process performs every step \u2014 open the render node, create a group, and race two of its own threads. No victim action or interaction is required.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority; there is no VM, IOMMU, or sandbox boundary crossed. Impact is confined to standard kernel-level compromise.\nC:H - The dangling `panthor_group` is subsequently dereferenced for `queue_count`, `queues[idx]->entity`, and `vm`, so a heap-sprayed replacement object (trivially another same-sized `panthor_group`) yields attacker-directed pointer reads. This gives a path to arbitrary kernel memory disclosure, not a bounded leak.\nI:H - `kref_get()` performs a write (refcount increment) into freed/reallocated memory, and the later `group_put()` decrements a refcount the caller never owned, enabling premature free of a live object. Combined with the controlled `queues[]`/`entity` pointers fed into `drm_sched_job_init()`, this is exploitable for arbitrary write and control-flow hijack.\nA:H - Even without successful exploitation, the use-after-free produces a refcount saturation warning, corrupted slab state, and dereference of freed memory, reliably causing an oops or panic. The race can be triggered repeatedly to crash the system at will."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/panthor/panthor_sched.c"], "versions": [{"version": "de85488138247d034eb3241840424a54d660926b", "lessThan": "8a585d553c11965332d7a2d74e79ef92a42bfc87", "status": "affected", "versionType": "git"}, {"version": "de85488138247d034eb3241840424a54d660926b", "lessThan": "44742138d151c3a945460ae7beff8ae45ac0bf58", "status": "affected", "versionType": "git"}, {"version": "de85488138247d034eb3241840424a54d660926b", "lessThan": "cac075706f298948898b1f63e81709df42afa75d", "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/gpu/drm/panthor/panthor_sched.c"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.10.14", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11.3", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12", "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": "6.10", "versionEndExcluding": "6.10.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.11.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.12"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8a585d553c11965332d7a2d74e79ef92a42bfc87"}, {"url": "https://git.kernel.org/stable/c/44742138d151c3a945460ae7beff8ae45ac0bf58"}, {"url": "https://git.kernel.org/stable/c/cac075706f298948898b1f63e81709df42afa75d"}], "title": "drm/panthor: Fix race when converting group handle to group object", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2024-50174", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-10-01T20:19:24.059028Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:27:10.632Z"}}]}}

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However there\nis still a race between retrieving the pointer from the XArray and\nincrementing the reference count.\n\nTo avoid this race simply hold the internal XArray lock when\nincrementing the reference count, this ensures there cannot be a racing\ncall to xa_erase()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/panthor: Se corrige la ejecuci\u00f3n al convertir el identificador de grupo en un objeto de grupo XArray proporciona su propio bloqueo interno que protege la matriz interna cuando se agregan y eliminan entradas simult\u00e1neamente. Sin embargo, todav\u00eda hay una ejecuci\u00f3n entre recuperar el puntero de XArray e incrementar el recuento de referencias. Para evitar esta ejecuci\u00f3n, simplemente mantenga el bloqueo interno de XArray al incrementar el recuento de referencias, esto garantiza que no pueda haber una llamada de ejecuci\u00f3n a xa_erase()."}], "id": "CVE-2024-50174", "lastModified": "2026-08-04T11:21:28.850", "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": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-50174", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T20:19:24.059028Z", "version": "2.0.3"}}]}, "published": "2024-11-08T06:15:14.923", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/44742138d151c3a945460ae7beff8ae45ac0bf58"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8a585d553c11965332d7a2d74e79ef92a42bfc87"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cac075706f298948898b1f63e81709df42afa75d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-362"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

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