CVE-2026-97577 (GCVE-0-2026-97577)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:21 – Updated: 2026-10-19 09:09
VLAI
Title
media: verisilicon: rockchip: reject AV1 frames exceeding the tile capacity
Summary
In the Linux kernel, the following vulnerability has been resolved: media: verisilicon: rockchip: reject AV1 frames exceeding the tile capacity rockchip_vpu981_av1_dec_set_tile_info() indexes the tile group entry array by tile1 * tile_cols + tile0, reading up to tile_cols * tile_rows entries, lays out one descriptor per tile in the AV1_MAX_TILES tile_info buffer, and programs the real tile_cols / tile_rows into the hardware. The tile group entry control is a dynamic array sized to the number of entries userspace submitted, independent of tile_cols / tile_rows, so a frame that claims more tiles than entries reads past the array. A frame that claims more than AV1_MAX_TILES tiles also leaves the hardware programmed for more tiles than the descriptor buffer holds. Reject both in prepare_run(): tile_cols * tile_rows must not exceed the submitted entry count or AV1_MAX_TILES. The entry count is read via v4l2_ctrl_find() (ctrl->elems). This mirrors the bound the mediatek AV1 decoder already enforces.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 727a400686a2c0d25015c9e44916a59b72882f83 , < 95ee48eb17c91bd4859b65e0a54e7722f370d0e5 (git)
Affected: 727a400686a2c0d25015c9e44916a59b72882f83 , < 40029f7f35397853f8711d6fce1d90a4c7a01f8c (git)
Affected: 727a400686a2c0d25015c9e44916a59b72882f83 , < a41babf528f70c9a82ed31cfb5fe19065910f7f0 (git)
Affected: 727a400686a2c0d25015c9e44916a59b72882f83 , < fd965369220cc160bb20a24991790814bfbab401 (git)
Affected: 727a400686a2c0d25015c9e44916a59b72882f83 , < 367db8b23c26a913d76ed70457bbcd781c422b49 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.5
Unaffected: 0 , < 6.5 (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2.7 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "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-\u003eelems). This mirrors the bound the mediatek AV1\ndecoder already enforces."
        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
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              "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() -\u003e 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\u0027s 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\u0027s 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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:09:39.822Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97577",
    "datePublished": "2026-09-25T10:21:59.950Z",
    "dateReserved": "2026-09-24T16:01:01.156Z",
    "dateUpdated": "2026-10-19T09:09:39.822Z",
    "state": "PUBLISHED"
  },
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      "id": "msrc_CVE-2026-97577",
      "initial_release_date": "2026-10-20T22:23:34.000Z",
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      "product_status:known_affected": "1",
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      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "media: verisilicon: rockchip: reject AV1 frames exceeding the tile capacity",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-97577.json",
      "version": "5"
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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-\u003eelems). This mirrors the bound the mediatek AV1\ndecoder already enforces."
          }
        ],
        "id": "CVE-2026-97577",
        "lastModified": "2026-10-19T10:17:26.973",
        "metrics": {
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                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
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        "vulnStatus": "Received"
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      "current_release_date": "2026-11-06T02:28:01+00:00",
      "cve": "CVE-2026-97577",
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      "product_status:known_not_affected": "203",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: media: verisilicon: rockchip: reject AV1 frames exceeding the tile capacity",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97577.json",
      "version": "3"
    }
  }
}



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