{"api_version":"1","generated_at":"2026-10-01T08:20:55+00:00","cve":"CVE-2026-97576","urls":{"html":"https://cve.report/CVE-2026-97576","api":"https://cve.report/api/cve/CVE-2026-97576.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-97576","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-97576"},"summary":{"title":"media: v4l2-ctrls: validate HEVC tile counts","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: v4l2-ctrls: validate HEVC tile counts\n\nThe stateless HEVC decoders read num_tile_columns_minus1 + 1 entries from\ncolumn_width_minus1[] and num_tile_rows_minus1 + 1 from row_height_minus1[]\nand use them as tile-loop bounds, but std_validate_compound() does not\nbound these u8 counts. Reject a V4L2_CTRL_TYPE_HEVC_PPS with tiling\nenabled whose tile counts exceed the uAPI array capacity, mirroring the\nexisting compound-control range checks.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-25 11:17:08","updated_at":"2026-09-25 15:17:59"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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"}}],"references":[{"url":"https://git.kernel.org/stable/c/dc694a9929f7cb9c88ef91e45eb982b7bbe5a477","name":"https://git.kernel.org/stable/c/dc694a9929f7cb9c88ef91e45eb982b7bbe5a477","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c7b1ef6dc57f4e57fe27cfdd3bf82033ed91ca34","name":"https://git.kernel.org/stable/c/c7b1ef6dc57f4e57fe27cfdd3bf82033ed91ca34","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ba1023d3a6d5d244d59f20c4ba6af4879ae08a9f","name":"https://git.kernel.org/stable/c/ba1023d3a6d5d244d59f20c4ba6af4879ae08a9f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/400cd78a63cc647412cf069c9851bdea2818340c","name":"https://git.kernel.org/stable/c/400cd78a63cc647412cf069c9851bdea2818340c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97576","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97576","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 256fa3920874b0f1f4cb79ad6766493a22187153 400cd78a63cc647412cf069c9851bdea2818340c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 256fa3920874b0f1f4cb79ad6766493a22187153 c7b1ef6dc57f4e57fe27cfdd3bf82033ed91ca34 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 256fa3920874b0f1f4cb79ad6766493a22187153 ba1023d3a6d5d244d59f20c4ba6af4879ae08a9f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 256fa3920874b0f1f4cb79ad6766493a22187153 dc694a9929f7cb9c88ef91e45eb982b7bbe5a477 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.5","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.111 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.53 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.7 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"97576","cve":"CVE-2026-97576","epss":"0.001630000","percentile":"0.049140000","score_date":"2026-09-27","updated_at":"2026-09-28 00:02:23"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/media/v4l2-core/v4l2-ctrls-core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"400cd78a63cc647412cf069c9851bdea2818340c","status":"affected","version":"256fa3920874b0f1f4cb79ad6766493a22187153","versionType":"git"},{"lessThan":"c7b1ef6dc57f4e57fe27cfdd3bf82033ed91ca34","status":"affected","version":"256fa3920874b0f1f4cb79ad6766493a22187153","versionType":"git"},{"lessThan":"ba1023d3a6d5d244d59f20c4ba6af4879ae08a9f","status":"affected","version":"256fa3920874b0f1f4cb79ad6766493a22187153","versionType":"git"},{"lessThan":"dc694a9929f7cb9c88ef91e45eb982b7bbe5a477","status":"affected","version":"256fa3920874b0f1f4cb79ad6766493a22187153","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/media/v4l2-core/v4l2-ctrls-core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.5"},{"lessThan":"5.5","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.111","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.53","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.111","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.7","versionStartIncluding":"5.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc3","versionStartIncluding":"5.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: v4l2-ctrls: validate HEVC tile counts\n\nThe stateless HEVC decoders read num_tile_columns_minus1 + 1 entries from\ncolumn_width_minus1[] and num_tile_rows_minus1 + 1 from row_height_minus1[]\nand use them as tile-loop bounds, but std_validate_compound() does not\nbound these u8 counts. Reject a V4L2_CTRL_TYPE_HEVC_PPS with tiling\nenabled whose tile counts exceed the uAPI array capacity, mirroring the\nexisting compound-control range checks."}],"metrics":[{"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":[{"lang":"en","value":"AV:L - The attacker-controlled bytes are num_tile_columns_minus1, num_tile_rows_minus1 and column_width_minus1[]/row_height_minus1[] in struct v4l2_ctrl_hevc_pps, copied from userspace by VIDIOC_S_EXT_CTRLS through v4l_s_ext_ctrls → v4l2_s_ext_ctrls → user_to_new into std_validate_compound(); no network protocol carries those fields.\nAC:L - Setting V4L2_HEVC_PPS_FLAG_TILES_ENABLED with num_tile_columns_minus1>=20 or num_tile_rows_minus1>=22 is enough; the next decode job (hantro_g2_hevc_dec_run→prepare_tile_info_buffer, rkvdec assemble_hw_pps→compute_tiles_non_uniform, or cedrus_h265_setup→cedrus_h265_write_tiles) uses those u8 counts as loop bounds with no race or hardware-fault precondition.\nPR:L - rkvdec_open(), hantro_open() and cedrus_open() perform no capable() check; v4l2_open only requires opening the decoder /dev/videoN. On Rockchip, Allwinner and Hantro devices that node is granted to unprivileged video-group or Android media-client users, not init-namespace root.\nUI:N - The attacking process opens the HEVC decoder itself, issues VIDIOC_S_EXT_CTRLS with the crafted V4L2_CTRL_TYPE_HEVC_PPS, then QBUF/STREAMON via the request API. No separate victim mount, file-open, or playback action is required.\nS:U - The overflows remain in kernel stack (vdpu383 assemble_hw_pps column_width[22]), hantro tile_sizes DMA memory, and the rkvdec param_set PPS packet. This is kernel memory corruption under the same security authority, not a VM, IOMMU, or sandbox escape.\nC:H - cedrus_h265_write_tiles() and compute_tiles_non_uniform() index column_width_minus1[20] and row_height_minus1[22] with a u8 count up to 255, reading past the v4l2_ctrl_hevc_pps object into adjacent kernel heap that is then copied into stack and DMA tile buffers.\nI:H - compute_tiles_non_uniform() writes attacker-chosen column_width_minus1[i]+1 values past stack arrays column_width[20/22]; prepare_tile_info_buffer() writes up to 256x256 u16 pairs into a 20x22 tile_sizes DMA buffer; rkvdec_set_bw_field() stores COLUMN_WIDTH(i) past the 80-byte PPS packet.\nA:H - The stack smash of column_width/row_height, the tile_sizes DMA overflow, and rkvdec_set_bw_field() writes past param_set can walk into unmapped or poisoned memory and oops the kernel, and can wedge the HEVC decoder hardware. The trigger is repeatable at will."}]}],"providerMetadata":{"dateUpdated":"2026-09-25T14:41:19.274Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/400cd78a63cc647412cf069c9851bdea2818340c"},{"url":"https://git.kernel.org/stable/c/c7b1ef6dc57f4e57fe27cfdd3bf82033ed91ca34"},{"url":"https://git.kernel.org/stable/c/ba1023d3a6d5d244d59f20c4ba6af4879ae08a9f"},{"url":"https://git.kernel.org/stable/c/dc694a9929f7cb9c88ef91e45eb982b7bbe5a477"}],"title":"media: v4l2-ctrls: validate HEVC tile counts","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-97576","datePublished":"2026-09-25T10:21:59.298Z","dateReserved":"2026-09-24T16:01:01.156Z","dateUpdated":"2026-09-25T14:41:19.274Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-25 11:17:08","lastModifiedDate":"2026-09-25 15:17:59","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"97576","Ordinal":"1","Title":"media: v4l2-ctrls: validate HEVC tile counts","CVE":"CVE-2026-97576","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"97576","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: v4l2-ctrls: validate HEVC tile counts\n\nThe stateless HEVC decoders read num_tile_columns_minus1 + 1 entries from\ncolumn_width_minus1[] and num_tile_rows_minus1 + 1 from row_height_minus1[]\nand use them as tile-loop bounds, but std_validate_compound() does not\nbound these u8 counts. Reject a V4L2_CTRL_TYPE_HEVC_PPS with tiling\nenabled whose tile counts exceed the uAPI array capacity, mirroring the\nexisting compound-control range checks.","Type":"Description","Title":"media: v4l2-ctrls: validate HEVC tile counts"}]}}}