{ "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": "2026-10-19T09:09:41.776Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:09:41.776Z" }, "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", "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" } ] } ] } ], "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" } } } }