{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97578", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T16:01:01.156Z", "datePublished": "2026-09-25T10:22:00.541Z", "dateUpdated": "2026-09-25T14:41:21.395Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-25T14:41:21.395Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: verisilicon: rockchip: guard VPU981 AV1 divisor and tile buffer\n\nrockchip_vpu981_av1_dec_set_tile_info() divides context_update_tile_id by\ntile_info->tile_cols and writes one descriptor per tile into the tile_info\nDMA buffer, which holds AV1_MAX_TILES entries; tile_cols and tile_rows\ncome from the bitstream. Guard the division against a zero tile_cols by\ninitialising the context-update values to zero and computing them only\nwhen tile_cols is non-zero, and stop the descriptor writes once the\ntile_info buffer is full. The tile geometry written to the hardware\nregisters is left unmodified; the per-dimension and total tile bounds are\nenforced by the control validation."}], "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 bad tile_cols/tile_rows reach rockchip_vpu981_av1_dec_set_tile_info() through the V4L2_CID_STATELESS_AV1_FRAME control, set with VIDIOC_S_EXT_CTRLS/media request ioctls on the local hantro /dev/videoN node and run via rockchip_vpu981_av1_dec_run(). No remote protocol carries the values; a userspace AV1 parser would have to pass through values that break the spec.\nAC:L - validate_av1_frame() never checks tile_cols or tile_rows, so any caller can set tile_cols=0 (divide by zero) or 255x255 tiles (writes far past the 2 KiB tile_info buffer). Nothing outside the attacker's control is needed; the fault happens every time the job runs.\nPR:L - The only requirement is opening the VPU981 AV1 stateless decoder video node, which the logged-in user (video group) or the Android/ChromeOS media codec process normally can do. The ioctl path has no capability check.\nUI:N - The attacker queues the malicious control and request themselves, and the device_run worker processes it without any action by another user.\nS:U - The corruption stays in the kernel's own memory and security authority. No VM, IOMMU, or other boundary is crossed.\nC:H - tile_id reaches about 65,000 while the tile_group_entry dynamic array holds at most 512 entries, and indexes of width/height_in_sbs_minus_1 above 64 run past those arrays. Out-of-bounds kernel data is read into the descriptors, and the memory corruption can be used to leak data.\nI:H - The loop writes 16 bytes per tile, up to 255*255 tiles (about 1 MiB), past the 128-entry (2 KiB) dma_alloc_coherent tile_info buffer. The x0/y0/start/end values it writes are largely user-controlled, so it is a large, content-controlled kernel memory overwrite.\nA:H - tile_cols=0 causes a divide error when computing context_update_tile_id, which oopses the kernel. The large out-of-bounds write also corrupts memory next to the buffer and crashes the system."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c"], "versions": [{"version": "727a400686a2c0d25015c9e44916a59b72882f83", "lessThan": "7baa7bb1b784c19170df8c99466fa412040eb431", "status": "affected", "versionType": "git"}, {"version": "727a400686a2c0d25015c9e44916a59b72882f83", "lessThan": "8f19d869a9f6800547c9ad7ebaf3b94f973dab50", "status": "affected", "versionType": "git"}, {"version": "727a400686a2c0d25015c9e44916a59b72882f83", "lessThan": "6b7a281a815ae7c5e7bb2aad039ffea9bc933157", "status": "affected", "versionType": "git"}, {"version": "727a400686a2c0d25015c9e44916a59b72882f83", "lessThan": "b84f6533a8ed2fd7b282fc7ab4b8efadc745a89c", "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/verisilicon/rockchip_vpu981_hw_av1_dec.c"], "versions": [{"version": "6.5", "status": "affected"}, {"version": "0", "lessThan": "6.5", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc3", "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": "6.5", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "7.3-rc3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7baa7bb1b784c19170df8c99466fa412040eb431"}, {"url": "https://git.kernel.org/stable/c/8f19d869a9f6800547c9ad7ebaf3b94f973dab50"}, {"url": "https://git.kernel.org/stable/c/6b7a281a815ae7c5e7bb2aad039ffea9bc933157"}, {"url": "https://git.kernel.org/stable/c/b84f6533a8ed2fd7b282fc7ab4b8efadc745a89c"}], "title": "media: verisilicon: rockchip: guard VPU981 AV1 divisor and tile buffer", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "7baa7bb1b784c19170df8c99466fa412040eb431", "status": "affected", "version": "727a400686a2c0d25015c9e44916a59b72882f83", "versionType": "git"}, {"lessThan": "8f19d869a9f6800547c9ad7ebaf3b94f973dab50", "status": "affected", "version": "727a400686a2c0d25015c9e44916a59b72882f83", "versionType": "git"}, {"lessThan": "6b7a281a815ae7c5e7bb2aad039ffea9bc933157", "status": "affected", "version": "727a400686a2c0d25015c9e44916a59b72882f83", "versionType": "git"}, {"lessThan": "b84f6533a8ed2fd7b282fc7ab4b8efadc745a89c", "status": "affected", "version": "727a400686a2c0d25015c9e44916a59b72882f83", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.5"}, {"lessThan": "6.5", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: verisilicon: rockchip: guard VPU981 AV1 divisor and tile buffer\n\nrockchip_vpu981_av1_dec_set_tile_info() divides context_update_tile_id by\ntile_info->tile_cols and writes one descriptor per tile into the tile_info\nDMA buffer, which holds AV1_MAX_TILES entries; tile_cols and tile_rows\ncome from the bitstream. Guard the division against a zero tile_cols by\ninitialising the context-update values to zero and computing them only\nwhen tile_cols is non-zero, and stop the descriptor writes once the\ntile_info buffer is full. The tile geometry written to the hardware\nregisters is left unmodified; the per-dimension and total tile bounds are\nenforced by the control validation."}], "id": "CVE-2026-97578", "lastModified": "2026-09-25T15:17:59.930", "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"}]}, "published": "2026-09-25T11:17:08.567", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6b7a281a815ae7c5e7bb2aad039ffea9bc933157"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7baa7bb1b784c19170df8c99466fa412040eb431"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8f19d869a9f6800547c9ad7ebaf3b94f973dab50"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b84f6533a8ed2fd7b282fc7ab4b8efadc745a89c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}