{"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":"2026-10-03T10:59:53.249Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-03T10:59:53.249Z"},"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":"8659e5fc21a82e00fb2db1557f2e06f0fca06b90","status":"affected","versionType":"git"},{"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":"6.6.158","lessThanOrEqual":"6.6.*","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":"6.6.158"},{"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/8659e5fc21a82e00fb2db1557f2e06f0fca06b90"},{"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"}}}}