{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-97577", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T16:01:01.156Z", "datePublished": "2026-09-25T10:21:59.950Z", "dateUpdated": "2026-10-19T09:09:39.822Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:09:39.822Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: verisilicon: rockchip: reject AV1 frames exceeding the tile capacity\n\nrockchip_vpu981_av1_dec_set_tile_info() indexes the tile group entry\narray by tile1 * tile_cols + tile0, reading up to tile_cols * tile_rows\nentries, lays out one descriptor per tile in the AV1_MAX_TILES tile_info\nbuffer, and programs the real tile_cols / tile_rows into the hardware.\n\nThe tile group entry control is a dynamic array sized to the number of\nentries userspace submitted, independent of tile_cols / tile_rows, so a\nframe that claims more tiles than entries reads past the array. A frame\nthat claims more than AV1_MAX_TILES tiles also leaves the hardware\nprogrammed for more tiles than the descriptor buffer holds.\n\nReject both in prepare_run(): tile_cols * tile_rows must not exceed the\nsubmitted entry count or AV1_MAX_TILES. The entry count is read via\nv4l2_ctrl_find() (ctrl->elems). This mirrors the bound the mediatek AV1\ndecoder already enforces." } ], "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 malformed tile_cols/tile_rows and TILE_GROUP_ENTRY data are supplied by a local process through V4L2 request ioctls (VIDIOC_S_EXT_CTRLS + MEDIA_REQUEST_IOC_QUEUE) on the vpu981 /dev/videoN decoder, reaching rockchip_vpu981_av1_dec_run() -> set_tile_info(); no network protocol carries the input.\nAC:L - validate_av1_frame() never bounds tile_cols/tile_rows (u8, up to 255), so setting tile_cols*tile_rows above 128 makes set_tile_info() deterministically write 16 bytes per tile past the 2KB AV1_TILE_INFO_SIZE buffer, with no race and no outside condition.\nPR:L - No capability check guards the stateless decoder's controls or request queue; the attacker only needs open access to the /dev/videoN node, which desktop udev grants to the logged-in seat user (uaccess) or the video group, i.e. an ordinary local user.\nUI:N - The attacker builds the AV1 frame and tile group entry controls and queues the decode request themselves; no other user has to act.\nS:U - The corruption is of kernel memory adjacent to the tile_info coherent buffer, and the resulting impact stays within the kernel's own authority; no VM, IOMMU or sandbox boundary is crossed.\nC:H - set_tile_info() reads group_entry[tile_id] past the dynamic TILE_GROUP_ENTRY array and width/height_in_sbs_minus_1[] past 64 entries; this out-of-bounds heap read is not strictly bounded to a few bytes, and the write primitive enables further disclosure.\nI:H - The loop writes tile_cols*tile_rows*16 bytes (up to ~1MB) into a 2KB dma_alloc_coherent buffer, with attacker-controlled tile_offset/tile_size and tile width/height bytes, giving an out-of-bounds kernel memory write of attacker-controlled data and length.\nA:H - A large overflow past the tile_info allocation corrupts adjacent kernel memory or faults on an unmapped guard page, causing a kernel oops or panic that the attacker can repeat at will." } ] } ], "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": "95ee48eb17c91bd4859b65e0a54e7722f370d0e5", "status": "affected", "versionType": "git" }, { "version": "727a400686a2c0d25015c9e44916a59b72882f83", "lessThan": "40029f7f35397853f8711d6fce1d90a4c7a01f8c", "status": "affected", "versionType": "git" }, { "version": "727a400686a2c0d25015c9e44916a59b72882f83", "lessThan": "a41babf528f70c9a82ed31cfb5fe19065910f7f0", "status": "affected", "versionType": "git" }, { "version": "727a400686a2c0d25015c9e44916a59b72882f83", "lessThan": "fd965369220cc160bb20a24991790814bfbab401", "status": "affected", "versionType": "git" }, { "version": "727a400686a2c0d25015c9e44916a59b72882f83", "lessThan": "367db8b23c26a913d76ed70457bbcd781c422b49", "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", "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" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/95ee48eb17c91bd4859b65e0a54e7722f370d0e5" }, { "url": "https://git.kernel.org/stable/c/40029f7f35397853f8711d6fce1d90a4c7a01f8c" }, { "url": "https://git.kernel.org/stable/c/a41babf528f70c9a82ed31cfb5fe19065910f7f0" }, { "url": "https://git.kernel.org/stable/c/fd965369220cc160bb20a24991790814bfbab401" }, { "url": "https://git.kernel.org/stable/c/367db8b23c26a913d76ed70457bbcd781c422b49" } ], "title": "media: verisilicon: rockchip: reject AV1 frames exceeding the tile capacity", "x_generator": { "engine": "bippy-1.2.0" } } } }