201 lines
11 KiB
JSON
201 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-97577",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-24T16:01:01.156Z",
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"datePublished": "2026-09-25T10:21:59.950Z",
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"dateUpdated": "2026-10-19T09:09:39.822Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:09:39.822Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c"
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],
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"versions": [
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{
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"version": "727a400686a2c0d25015c9e44916a59b72882f83",
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"lessThan": "95ee48eb17c91bd4859b65e0a54e7722f370d0e5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "727a400686a2c0d25015c9e44916a59b72882f83",
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"lessThan": "40029f7f35397853f8711d6fce1d90a4c7a01f8c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "727a400686a2c0d25015c9e44916a59b72882f83",
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"lessThan": "a41babf528f70c9a82ed31cfb5fe19065910f7f0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "727a400686a2c0d25015c9e44916a59b72882f83",
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"lessThan": "fd965369220cc160bb20a24991790814bfbab401",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "727a400686a2c0d25015c9e44916a59b72882f83",
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"lessThan": "367db8b23c26a913d76ed70457bbcd781c422b49",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c"
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],
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"versions": [
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{
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"version": "6.5",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.5",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.158",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.111",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.53",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.7",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.5",
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"versionEndExcluding": "6.6.158"
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"versionEndExcluding": "7.2.7"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.5",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/95ee48eb17c91bd4859b65e0a54e7722f370d0e5"
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},
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{
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"url": "https://git.kernel.org/stable/c/40029f7f35397853f8711d6fce1d90a4c7a01f8c"
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},
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{
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"url": "https://git.kernel.org/stable/c/a41babf528f70c9a82ed31cfb5fe19065910f7f0"
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},
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{
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"url": "https://git.kernel.org/stable/c/fd965369220cc160bb20a24991790814bfbab401"
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},
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{
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"url": "https://git.kernel.org/stable/c/367db8b23c26a913d76ed70457bbcd781c422b49"
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}
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],
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"title": "media: verisilicon: rockchip: reject AV1 frames exceeding the tile capacity",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |