{"api_version":"1","generated_at":"2026-10-01T08:20:56+00:00","cve":"CVE-2026-97578","urls":{"html":"https://cve.report/CVE-2026-97578","api":"https://cve.report/api/cve/CVE-2026-97578.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-97578","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-97578"},"summary":{"title":"media: verisilicon: rockchip: guard VPU981 AV1 divisor and tile buffer","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-25 11:17:08","updated_at":"2026-09-25 15:17:59"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/8f19d869a9f6800547c9ad7ebaf3b94f973dab50","name":"https://git.kernel.org/stable/c/8f19d869a9f6800547c9ad7ebaf3b94f973dab50","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b84f6533a8ed2fd7b282fc7ab4b8efadc745a89c","name":"https://git.kernel.org/stable/c/b84f6533a8ed2fd7b282fc7ab4b8efadc745a89c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6b7a281a815ae7c5e7bb2aad039ffea9bc933157","name":"https://git.kernel.org/stable/c/6b7a281a815ae7c5e7bb2aad039ffea9bc933157","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7baa7bb1b784c19170df8c99466fa412040eb431","name":"https://git.kernel.org/stable/c/7baa7bb1b784c19170df8c99466fa412040eb431","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97578","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97578","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 727a400686a2c0d25015c9e44916a59b72882f83 7baa7bb1b784c19170df8c99466fa412040eb431 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 727a400686a2c0d25015c9e44916a59b72882f83 8f19d869a9f6800547c9ad7ebaf3b94f973dab50 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 727a400686a2c0d25015c9e44916a59b72882f83 6b7a281a815ae7c5e7bb2aad039ffea9bc933157 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 727a400686a2c0d25015c9e44916a59b72882f83 b84f6533a8ed2fd7b282fc7ab4b8efadc745a89c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.5","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.111 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.53 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.7 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"97578","cve":"CVE-2026-97578","epss":"0.001630000","percentile":"0.049140000","score_date":"2026-09-27","updated_at":"2026-09-28 00:02:23"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"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"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.111","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.7","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc3","versionStartIncluding":"6.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"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."}]}],"providerMetadata":{"dateUpdated":"2026-09-25T14:41:21.395Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-97578","datePublished":"2026-09-25T10:22:00.541Z","dateReserved":"2026-09-24T16:01:01.156Z","dateUpdated":"2026-09-25T14:41:21.395Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-25 11:17:08","lastModifiedDate":"2026-09-25 15:17:59","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"97578","Ordinal":"1","Title":"media: verisilicon: rockchip: guard VPU981 AV1 divisor and tile ","CVE":"CVE-2026-97578","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"97578","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"media: verisilicon: rockchip: guard VPU981 AV1 divisor and tile "}]}}}