{"api_version":"1","generated_at":"2026-10-01T08:20:56+00:00","cve":"CVE-2026-97575","urls":{"html":"https://cve.report/CVE-2026-97575","api":"https://cve.report/api/cve/CVE-2026-97575.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-97575","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-97575"},"summary":{"title":"media: v4l2-ctrls: validate AV1 tile counts","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: v4l2-ctrls: validate AV1 tile counts\n\nThe stateless AV1 decoders use tile_info.tile_cols and tile_rows as loop\nbounds and as indices into the mi_*_starts[] and *_in_sbs_minus_1[]\narrays, as the divisor for context_update_tile_id, and their product\nbounds the per-tile descriptor buffers, but std_validate_compound() does\nnot bound these u8 fields. Reject a V4L2_CTRL_TYPE_AV1_FRAME whose\ntile_cols or tile_rows exceeds V4L2_AV1_MAX_TILE_COLS / _ROWS, or whose\nproduct exceeds V4L2_AV1_MAX_TILE_COUNT. A zero tile count is left to the\nconsuming driver so the zero-initialised control that existing userspace\nsubmits is still accepted.","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/85df9fc79b07f1cc7c953f930ae7e675d0c1e820","name":"https://git.kernel.org/stable/c/85df9fc79b07f1cc7c953f930ae7e675d0c1e820","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c8891da0186fe4c04bccbbd7d84b01a3c941ac7a","name":"https://git.kernel.org/stable/c/c8891da0186fe4c04bccbbd7d84b01a3c941ac7a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c4c88b5ba85685043d171e0e9c9d00a8cf6a89e8","name":"https://git.kernel.org/stable/c/c4c88b5ba85685043d171e0e9c9d00a8cf6a89e8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/439058ced617fbb3febc017b9e93bb7387f309e0","name":"https://git.kernel.org/stable/c/439058ced617fbb3febc017b9e93bb7387f309e0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97575","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97575","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9de30f579980b498606a9c2440b73ae3b670771b 85df9fc79b07f1cc7c953f930ae7e675d0c1e820 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9de30f579980b498606a9c2440b73ae3b670771b c8891da0186fe4c04bccbbd7d84b01a3c941ac7a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9de30f579980b498606a9c2440b73ae3b670771b c4c88b5ba85685043d171e0e9c9d00a8cf6a89e8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9de30f579980b498606a9c2440b73ae3b670771b 439058ced617fbb3febc017b9e93bb7387f309e0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.5","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.5 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":"97575","cve":"CVE-2026-97575","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":"85df9fc79b07f1cc7c953f930ae7e675d0c1e820","status":"affected","version":"9de30f579980b498606a9c2440b73ae3b670771b","versionType":"git"},{"lessThan":"c8891da0186fe4c04bccbbd7d84b01a3c941ac7a","status":"affected","version":"9de30f579980b498606a9c2440b73ae3b670771b","versionType":"git"},{"lessThan":"c4c88b5ba85685043d171e0e9c9d00a8cf6a89e8","status":"affected","version":"9de30f579980b498606a9c2440b73ae3b670771b","versionType":"git"},{"lessThan":"439058ced617fbb3febc017b9e93bb7387f309e0","status":"affected","version":"9de30f579980b498606a9c2440b73ae3b670771b","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":"6.5"},{"lessThan":"6.5","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":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.7","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc3","versionStartIncluding":"6.5","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 AV1 tile counts\n\nThe stateless AV1 decoders use tile_info.tile_cols and tile_rows as loop\nbounds and as indices into the mi_*_starts[] and *_in_sbs_minus_1[]\narrays, as the divisor for context_update_tile_id, and their product\nbounds the per-tile descriptor buffers, but std_validate_compound() does\nnot bound these u8 fields. Reject a V4L2_CTRL_TYPE_AV1_FRAME whose\ntile_cols or tile_rows exceeds V4L2_AV1_MAX_TILE_COLS / _ROWS, or whose\nproduct exceeds V4L2_AV1_MAX_TILE_COUNT. A zero tile count is left to the\nconsuming driver so the zero-initialised control that existing userspace\nsubmits is still accepted."}],"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 tile_info.tile_cols/tile_rows u8s enter the kernel in V4L2_CID_STATELESS_AV1_FRAME via VIDIOC_S_EXT_CTRLS (or the request-fd path through try_set_ext_ctrls_request) on a local /dev/videoN AV1 decoder; validate_av1_frame() in std_validate_compound() is that ioctl's check. No network protocol carries those fields.\nAC:L - The attacker sets tile_cols and tile_rows to any u8 (e.g. 255) in that AV1_FRAME control and queues STREAMON/MEDIA_REQUEST_IOC_QUEUE; vdec_av1_slice_setup_tile() and rockchip_vpu981_av1_dec_set_tile_info() then loop and index on those values deterministically, with no race or victim-side state.\nPR:L - hantro_open() and fops_vcodec_open() have no capable() check; v4l2_prio_check() only compares V4L2 file-handle priority among openers. An unprivileged local user who can open the decoder node (video group, udev uaccess, or Android media-codec UID) is sufficient.\nUI:N - The attacking process itself opens the stateless AV1 decoder, submits the crafted AV1_FRAME control, queues buffers, and starts streaming. No victim action such as mounting media or opening a file is required.\nS:U - The overflows stay inside the kernel's kzalloc'd vdec_av1_slice_pfc (lat_buf->private_data) and the hantro tile_info coherent DMA buffer in the same kernel security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - rockchip_vpu981_av1_dec_set_tile_info() reads group_entry[tile1*tile_cols+tile0] with a product up to 255*255 past the V4L2_AV1_MAX_TILE_COUNT TILE_GROUP_ENTRY array, and indexes height_in_sbs_minus_1[tile1] past its 64-entry field, pulling adjacent kernel heap into the decode path.\nI:H - vdec_av1_slice_setup_tile() writes tile_cols+1 entries into mi_col_starts[V4L2_AV1_MAX_TILE_COLS+1] on the kzalloc'd pfc before the later product check; rockchip_vpu981_av1_dec_set_tile_info() writes 16 bytes per tile into a 128-slot (AV1_TILE_INFO_SIZE) DMA buffer for up to 255*255 tiles, an attacker-controlled kernel write.\nA:H - Those heap and DMA-buffer overruns walk into unmapped or poisoned memory and produce a kernel oops or KASAN report, and the attacker can repeat the AV1_FRAME request at will."}]}],"providerMetadata":{"dateUpdated":"2026-09-25T14:41:18.210Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/85df9fc79b07f1cc7c953f930ae7e675d0c1e820"},{"url":"https://git.kernel.org/stable/c/c8891da0186fe4c04bccbbd7d84b01a3c941ac7a"},{"url":"https://git.kernel.org/stable/c/c4c88b5ba85685043d171e0e9c9d00a8cf6a89e8"},{"url":"https://git.kernel.org/stable/c/439058ced617fbb3febc017b9e93bb7387f309e0"}],"title":"media: v4l2-ctrls: validate AV1 tile counts","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-97575","datePublished":"2026-09-25T10:21:58.700Z","dateReserved":"2026-09-24T16:01:01.156Z","dateUpdated":"2026-09-25T14:41:18.210Z","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":"97575","Ordinal":"1","Title":"media: v4l2-ctrls: validate AV1 tile counts","CVE":"CVE-2026-97575","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"97575","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: v4l2-ctrls: validate AV1 tile counts\n\nThe stateless AV1 decoders use tile_info.tile_cols and tile_rows as loop\nbounds and as indices into the mi_*_starts[] and *_in_sbs_minus_1[]\narrays, as the divisor for context_update_tile_id, and their product\nbounds the per-tile descriptor buffers, but std_validate_compound() does\nnot bound these u8 fields. Reject a V4L2_CTRL_TYPE_AV1_FRAME whose\ntile_cols or tile_rows exceeds V4L2_AV1_MAX_TILE_COLS / _ROWS, or whose\nproduct exceeds V4L2_AV1_MAX_TILE_COUNT. A zero tile count is left to the\nconsuming driver so the zero-initialised control that existing userspace\nsubmits is still accepted.","Type":"Description","Title":"media: v4l2-ctrls: validate AV1 tile counts"}]}}}