CVE-2026-89724

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89724", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.759Z", "datePublished": "2026-09-11T19:46:35.914Z", "dateUpdated": "2026-10-19T08:51:37.470Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:51:37.470Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: vicodec: fix out-of-bounds write in FWHT encoder\n\nvidioc_s_fmt_vid_out() sizes the encoder CAPTURE buffer from the\ncompressed descriptor pixfmt_fwht, whose sizeimage_mult is 3:\ncoded_w * coded_h * 3 + sizeof(struct fwht_cframe_hdr). fwht_encode_frame()\nencodes one plane per component, and an incompressible plane takes the\nFWHT_FRAME_UNENCODED path in encode_plane(), copying the plane verbatim.\n\nFor a 4-component pixel format all four planes are full resolution\n(width_div == height_div == 1), so a frame that forces every plane\nthrough the unencoded fallback writes\nsizeof(struct fwht_cframe_hdr) + 4 * coded_w * coded_h bytes, overrunning\nthe plane by coded_w * coded_h, which can result in corruption\nof adjacent kernel heap memory.\n\nBump pixfmt_fwht.sizeimage_mult from 3 to 4, matching the largest\ncomponents_num among the supported raw formats, so the capture buffer is\nalways large enough for the unencoded fallback."}], "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 overflow is reached only through local V4L2 ioctls (VIDIOC_S_FMT, VIDIOC_REQBUFS, VIDIOC_QBUF, VIDIOC_STREAMON) on the vicodec stateful-encoder /dev/videoN node; there is no network or adjacent-protocol path into fwht_encode_frame().\nAC:L - An attacker selects a 4-component OUTPUT format (RGBA32/ARGB32 and similar), feeds incompressible planes (and may set QP=1), and starts streaming so every plane takes the FWHT_FRAME_UNENCODED copy path; no race or uncontrolled memory-layout precondition is required.\nPR:L - vicodec_open() and the encoder ioctl path perform no capability checks; any local user who can open the video node (video group or logind/udev uaccess on desktops, Android, and media CI) can trigger the overflow.\nUI:N - The attacking process opens the encoder node, sets the 4-component format, queues incompressible buffers, and starts streaming itself; no victim action or cooperation is required.\nS:U - The out-of-bounds write corrupts kernel memory in the same security authority as the kernel itself; this is a conventional in-kernel vmalloc/heap overflow, not a VM, IOMMU, or sandbox boundary crossing.\nC:H - encode_plane() writes past the vb2 capture plane into adjacent kernel memory, and that heap/vmalloc corruption is leverageable for kernel information disclosure, matching C:H for comparable V4L2 out-of-bounds writes.\nI:H - This is an out-of-bounds write of attacker-controlled pixel bytes (0xff remapped to 0xfe) of coded_w*coded_h bytes (at least 640x360) past the capture buffer, a classic kernel memory-corruption primitive suitable for control-flow hijacking.\nA:H - Writing hundreds of kilobytes past the allocated capture plane hits a vmalloc guard page or corrupts neighbouring objects, producing a kernel oops or panic that an unprivileged user can re-trigger 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/test-drivers/vicodec/vicodec-core.c"], "versions": [{"version": "16ecf6dff97ce0194a7126e26159492668d47a7e", "lessThan": "f7ae26c100a6c26c2a166d2c41e73188067b36bd", "status": "affected", "versionType": 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"16ecf6dff97ce0194a7126e26159492668d47a7e", "lessThan": "cf4500ebf6fb57bf4ab83c3dd349a40257dbe2a9", "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/test-drivers/vicodec/vicodec-core.c"], "versions": [{"version": "5.0", "status": "affected"}, {"version": "0", "lessThan": "5.0", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "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": "5.0", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f7ae26c100a6c26c2a166d2c41e73188067b36bd"}, {"url": "https://git.kernel.org/stable/c/6ea647e76c44387d5c1c635df4604c2154d9060e"}, {"url": "https://git.kernel.org/stable/c/d40838a63f2bd6a3df0a6cdd8ff1d5c6366e8fff"}, {"url": "https://git.kernel.org/stable/c/e21cccc29b840930cd9dcfdf1139658063a681af"}, {"url": "https://git.kernel.org/stable/c/84cfebf7f4229d748cca8eb9c4e1f1c4099d3ab7"}, {"url": "https://git.kernel.org/stable/c/8c14472431e27f13661d0db9d837156eaced0ecb"}, {"url": "https://git.kernel.org/stable/c/b95315ffc66b39856396c1043618bb4e4d5785ba"}, {"url": "https://git.kernel.org/stable/c/cf4500ebf6fb57bf4ab83c3dd349a40257dbe2a9"}], "title": "media: vicodec: fix out-of-bounds write in FWHT encoder", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/media/test-drivers/vicodec/vicodec-core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f7ae26c100a6c26c2a166d2c41e73188067b36bd", "status": "affected", "version": "16ecf6dff97ce0194a7126e26159492668d47a7e", "versionType": "git"}, {"lessThan": "6ea647e76c44387d5c1c635df4604c2154d9060e", "status": "affected", "version": "16ecf6dff97ce0194a7126e26159492668d47a7e", "versionType": "git"}, {"lessThan": "d40838a63f2bd6a3df0a6cdd8ff1d5c6366e8fff", "status": "affected", "version": "16ecf6dff97ce0194a7126e26159492668d47a7e", "versionType": "git"}, {"lessThan": "e21cccc29b840930cd9dcfdf1139658063a681af", "status": "affected", "version": "16ecf6dff97ce0194a7126e26159492668d47a7e", "versionType": "git"}, {"lessThan": "84cfebf7f4229d748cca8eb9c4e1f1c4099d3ab7", "status": "affected", "version": "16ecf6dff97ce0194a7126e26159492668d47a7e", "versionType": "git"}, {"lessThan": "8c14472431e27f13661d0db9d837156eaced0ecb", "status": "affected", "version": "16ecf6dff97ce0194a7126e26159492668d47a7e", "versionType": "git"}, {"lessThan": "b95315ffc66b39856396c1043618bb4e4d5785ba", "status": "affected", "version": "16ecf6dff97ce0194a7126e26159492668d47a7e", "versionType": "git"}, {"lessThan": "cf4500ebf6fb57bf4ab83c3dd349a40257dbe2a9", "status": "affected", "version": "16ecf6dff97ce0194a7126e26159492668d47a7e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/media/test-drivers/vicodec/vicodec-core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.0"}, {"lessThan": "5.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: vicodec: fix out-of-bounds write in FWHT encoder\n\nvidioc_s_fmt_vid_out() sizes the encoder CAPTURE buffer from the\ncompressed descriptor pixfmt_fwht, whose sizeimage_mult is 3:\ncoded_w * coded_h * 3 + sizeof(struct fwht_cframe_hdr). fwht_encode_frame()\nencodes one plane per component, and an incompressible plane takes the\nFWHT_FRAME_UNENCODED path in encode_plane(), copying the plane verbatim.\n\nFor a 4-component pixel format all four planes are full resolution\n(width_div == height_div == 1), so a frame that forces every plane\nthrough the unencoded fallback writes\nsizeof(struct fwht_cframe_hdr) + 4 * coded_w * coded_h bytes, overrunning\nthe plane by coded_w * coded_h, which can result in corruption\nof adjacent kernel heap memory.\n\nBump pixfmt_fwht.sizeimage_mult from 3 to 4, matching the largest\ncomponents_num among the supported raw formats, so the capture buffer is\nalways large enough for the unencoded fallback."}], "id": "CVE-2026-89724", "lastModified": "2026-10-19T09:18:13.167", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:20:02.050", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6ea647e76c44387d5c1c635df4604c2154d9060e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/84cfebf7f4229d748cca8eb9c4e1f1c4099d3ab7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8c14472431e27f13661d0db9d837156eaced0ecb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b95315ffc66b39856396c1043618bb4e4d5785ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cf4500ebf6fb57bf4ab83c3dd349a40257dbe2a9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d40838a63f2bd6a3df0a6cdd8ff1d5c6366e8fff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e21cccc29b840930cd9dcfdf1139658063a681af"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f7ae26c100a6c26c2a166d2c41e73188067b36bd"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: media: vicodec: Memory corruption due to out-of-bounds write", "id": "2532428", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532428"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's `media: vicodec` component. An out-of-bounds write vulnerability exists in the FWHT encoder due to incorrect buffer sizing during video output format handling. This issue allows an attacker to cause corruption of adjacent kernel heap memory, which could lead to system instability or a denial of service."], "name": "CVE-2026-89724", "public_date": "2026-09-11T19:46:35Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89724\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89724\nhttps://git.kernel.org/stable/c/84cfebf7f4229d748cca8eb9c4e1f1c4099d3ab7\nhttps://git.kernel.org/stable/c/8c14472431e27f13661d0db9d837156eaced0ecb\nhttps://git.kernel.org/stable/c/b95315ffc66b39856396c1043618bb4e4d5785ba\nhttps://git.kernel.org/stable/c/cf4500ebf6fb57bf4ab83c3dd349a40257dbe2a9"], "threat_severity": "Moderate"}

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