{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97579","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-24T16:01:01.156Z","datePublished":"2026-09-25T10:22:01.216Z","dateUpdated":"2026-10-03T10:59:54.361Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-03T10:59:54.361Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mediatek: vcodec: bound AV1 tile-start copy to the array capacity\n\nvdec_av1_slice_setup_tile() copies tile_cols + 1 / tile_rows + 1 entries\ninto mi_col_starts[] / mi_row_starts[] from the bitstream tile_info. Bound\nthe copy to the array capacity."}],"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_info.tile_cols/tile_rows reach vdec_av1_slice_setup_tile() from a local process that sets V4L2_CID_STATELESS_AV1_FRAME via VIDIOC_S_EXT_CTRLS on the mtk-vcodec decoder /dev/videoN and queues a request. A spec-conforming AV1 parser caps tile counts at 64, so a remote bitstream does not produce the malformed values.\nAC:L - The attacker sets tile_cols or tile_rows to any value from 65 to 255. validate_av1_frame() never checks them, and the driver's num_tiles check in vdec_av1_slice_setup_tile_group() runs after vdec_av1_slice_setup_pfc() has already done the copy, so the overflow happens on every such request.\nPR:L - It needs only the ability to open the decoder video node, which is normally granted to the video group or to media/GPU processes. No capability check lies on the ioctl or request-queue path to vdec_av1_slice_lat_decode().\nUI:N - The attacker supplies the control payload and queues the request themselves. No other user has to do anything.\nS:U - This is a heap overflow in kernel memory. It gives kernel-level impact within the same security authority, not a VM or IOMMU boundary crossing.\nC:H - Writing up to 764 bytes past mi_row_starts[] runs off the end of the kzalloc'd vdec_av1_slice_pfc into the neighbouring slab object. That corruption can be used to build read primitives and leak kernel memory.\nI:H - The written values are ALIGN(ctrl_tile->mi_*_starts[i]) >> mib_size_log2, taken from the attacker's own control payload. This gives an attacker-shaped heap out-of-bounds write that can corrupt neighbouring objects.\nA:H - Corrupting the pfc fields past the tile arrays (frame, state, ref_idx) and the neighbouring slab object can oops the kernel or hang the decoder, and any local user with device access can repeat it."}]}],"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/decoder/vdec/vdec_av1_req_lat_if.c"],"versions":[{"version":"0934d37596151edce115c6d0843a9ad7d5e5d232","lessThan":"f19acf00818a9eada06a77715d0188c181fb435e","status":"affected","versionType":"git"},{"version":"0934d37596151edce115c6d0843a9ad7d5e5d232","lessThan":"ad47a250afafa3a51cfb4a004463ff28e66c596e","status":"affected","versionType":"git"},{"version":"0934d37596151edce115c6d0843a9ad7d5e5d232","lessThan":"7992059c045780095ba5a696dcb2f5400a82803c","status":"affected","versionType":"git"},{"version":"0934d37596151edce115c6d0843a9ad7d5e5d232","lessThan":"eb0ea3898e3921900939e30c3946dd2b52281859","status":"affected","versionType":"git"},{"version":"0934d37596151edce115c6d0843a9ad7d5e5d232","lessThan":"37bef2170d4c88fc3d708eecf3ef0f4032bc1372","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/decoder/vdec/vdec_av1_req_lat_if.c"],"versions":[{"version":"6.6","status":"affected"},{"version":"0","lessThan":"6.6","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":"6.6","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.3-rc3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/f19acf00818a9eada06a77715d0188c181fb435e"},{"url":"https://git.kernel.org/stable/c/ad47a250afafa3a51cfb4a004463ff28e66c596e"},{"url":"https://git.kernel.org/stable/c/7992059c045780095ba5a696dcb2f5400a82803c"},{"url":"https://git.kernel.org/stable/c/eb0ea3898e3921900939e30c3946dd2b52281859"},{"url":"https://git.kernel.org/stable/c/37bef2170d4c88fc3d708eecf3ef0f4032bc1372"}],"title":"media: mediatek: vcodec: bound AV1 tile-start copy to the array capacity","x_generator":{"engine":"bippy-1.2.0"}}}}