{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-35919", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-17T13:50:33.123Z", "datePublished": "2024-05-19T10:10:31.707Z", "dateUpdated": "2026-08-05T11:30:58.513Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:30:58.513Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mediatek: vcodec: adding lock to protect encoder context list\n\nAdd a lock for the ctx_list, to avoid accessing a NULL pointer\nwithin the 'vpu_enc_ipi_handler' function when the ctx_list has\nbeen deleted due to an unexpected behavior on the SCP IP block." } ], "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 by opening the MediaTek V4L2 encoder device node (/dev/videoN) and issuing encode ioctls that trigger SCP/VPU IPI replies into vpu_enc_ipi_handler(); no network or physical access is involved.\nAC:L - The attacker controls both sides of the race — one thread issues encode operations generating asynchronous SCP IPI callbacks while another thread repeatedly opens/closes encoder contexts to free the ctx mid-traversal; the handler runs in IRQ/workqueue context and can preempt the releasing task, and the window covers the whole unlocked list walk.\nPR:L - Requires only an unprivileged local process with access to the encoder video device node, which on Android and ChromeOS MediaTek devices is granted to ordinary media/codec HAL and sandboxed video processes; no CAP_SYS_ADMIN or root is needed.\nUI:N - The attacker's own processes perform every step — open, encode, and close — with no action required from any other user.\nS:U - The corruption and its consequences are confined to the kernel's own security authority; there is no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The unlocked traversal dereferences a freed mtk_vcodec_enc_ctx, and reclaiming that slab object lets the attacker control list.next, turning the walk into a controlled kernel-memory read oracle (comparing ctx->vpu_inst at attacker-chosen addresses) capable of disclosing arbitrary kernel data.\nI:H - vpu_enc_check_ap_inst() is the validation gate for the firmware-supplied venc_inst pointer; a spurious true from the use-after-free lets handle_enc_init_msg() and the error path write vpu->inst_addr/vpu->vsi/vpu->failure/vpu->signaled through an unvalidated pointer, and heap-spray reclamation of the freed ctx provides a write primitive usable for control-flow hijacking.\nA:H - The use-after-free reliably produces a NULL/wild pointer dereference and kernel oops — an actual panic backtrace in vpu_dec_ipi_handler on a shipping MT8183 Chromebook is documented for the identical decoder-side bug — and following a corrupted list.next can also hang the CPU in IRQ context." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c", "drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.c", "drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.h", "drivers/media/platform/mediatek/vcodec/encoder/venc_vpu_if.c" ], "versions": [ { "version": "1972e32431ed14682909ad568c6fd660572ae6ab", "lessThan": "41671f0c0182b2bae74ca7e3b0f155559e3e2fc5", "status": "affected", "versionType": "git" }, { "version": "1972e32431ed14682909ad568c6fd660572ae6ab", "lessThan": "51c84a8aac6e3b59af2b0e92ba63cabe2e641a2d", "status": "affected", "versionType": "git" }, { "version": "1972e32431ed14682909ad568c6fd660572ae6ab", "lessThan": "afaaf3a0f647a24a7bf6a2145d8ade37baaf75ad", "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/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_vpu.c", "drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.c", "drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.h", "drivers/media/platform/mediatek/vcodec/encoder/venc_vpu_if.c" ], "versions": [ { "version": "6.6", "status": "affected" }, { "version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.27", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.6", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9", "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": "6.6", "versionEndExcluding": "6.6.27" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.8.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/41671f0c0182b2bae74ca7e3b0f155559e3e2fc5" }, { "url": "https://git.kernel.org/stable/c/51c84a8aac6e3b59af2b0e92ba63cabe2e641a2d" }, { "url": "https://git.kernel.org/stable/c/afaaf3a0f647a24a7bf6a2145d8ade37baaf75ad" } ], "title": "media: mediatek: vcodec: adding lock to protect encoder context list", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information" } ] } ], "affected": [ { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "1972e32431ed", "status": "affected", "lessThan": "41671f0c0182", "versionType": "custom" }, { "version": "1972e32431ed", "status": "affected", "lessThan": "51c84a8aac6e", "versionType": "custom" }, { "version": "1972e32431ed", "status": "affected", "lessThan": "afaaf3a0f647", "versionType": "custom" }, { "version": "6.6", "status": "affected" }, { "version": "0", "status": "affected", "lessThan": "6.6*", "versionType": "custom" }, { "version": "6.6.27", "status": "affected", "lessThanOrEqual": "6.6*", "versionType": "custom" }, { "version": "6.8.6", "status": "affected", "lessThanOrEqual": "6.8*", "versionType": "custom" }, { "version": "6.9", "status": "affected", "lessThanOrEqual": "*", "versionType": "custom" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2024-10-31T14:03:42.763507Z", "id": "CVE-2024-35919", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-31T14:08:27.502Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T03:21:49.013Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/41671f0c0182b2bae74ca7e3b0f155559e3e2fc5", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/51c84a8aac6e3b59af2b0e92ba63cabe2e641a2d", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/afaaf3a0f647a24a7bf6a2145d8ade37baaf75ad", "tags": [ "x_transferred" ] } ] } ] } }