{"id":"CVE-2026-89724","title":"media: vicodec: fix out-of-bounds write in FWHT encoder","summary":"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 sizei…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-787"],"vendor":"Linux","product":"Linux","affected":["Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < f7ae26c100a6c26c2a166d2c41e73188067b36bd","Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < 6ea647e76c44387d5c1c635df4604c2154d9060e","Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < d40838a63f2bd6a3df0a6cdd8ff1d5c6366e8fff","Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < e21cccc29b840930cd9dcfdf1139658063a681af","Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < 84cfebf7f4229d748cca8eb9c4e1f1c4099d3ab7","Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < 8c14472431e27f13661d0db9d837156eaced0ecb","Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < b95315ffc66b39856396c1043618bb4e4d5785ba","Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < cf4500ebf6fb57bf4ab83c3dd349a40257dbe2a9","Linux 5.0"],"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:51:37.470Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89724","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"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89724.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89724"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532428"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89724"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89724"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89724.mbox"}],"tags":["cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00169,"epssPercentile":0.06192,"scores":{"cna":7.8,"vendor":5.5},"ingestedAt":"2026-09-14T15:23:07.449Z","slug":"CVE-2026-89724","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < f7ae26c100a6c26c2a166d2c41e73188067b36bd`\n- `Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < 6ea647e76c44387d5c1c635df4604c2154d9060e`\n- `Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < d40838a63f2bd6a3df0a6cdd8ff1d5c6366e8fff`\n- `Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < e21cccc29b840930cd9dcfdf1139658063a681af`\n- `Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < 84cfebf7f4229d748cca8eb9c4e1f1c4099d3ab7`\n- `Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < 8c14472431e27f13661d0db9d837156eaced0ecb`\n- `Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < b95315ffc66b39856396c1043618bb4e4d5785ba`\n- `Linux >= 16ecf6dff97ce0194a7126e26159492668d47a7e < cf4500ebf6fb57bf4ab83c3dd349a40257dbe2a9`\n- `Linux 5.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89724.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224594,"id":"CVE-2026-89724","ts":1792401425631,"field":"cvss","old":"5.5","new":"7.8"},{"seq":224593,"id":"CVE-2026-89724","ts":1792401425631,"field":"severity","old":"medium","new":"high"},{"seq":203904,"id":"CVE-2026-89724","ts":1789490220130,"field":"cvss","old":"7.8","new":"5.5"},{"seq":203903,"id":"CVE-2026-89724","ts":1789490220130,"field":"severity","old":"high","new":"medium"},{"seq":197693,"id":"CVE-2026-89724","ts":1789384318433,"field":"cvss","old":"6.3","new":"7.8"},{"seq":197692,"id":"CVE-2026-89724","ts":1789384318433,"field":"severity","old":"medium","new":"high"},{"seq":183849,"id":"CVE-2026-89724","ts":1789356677662,"field":"cvss","old":"7.8","new":"6.3"},{"seq":183848,"id":"CVE-2026-89724","ts":1789356677662,"field":"severity","old":"high","new":"medium"},{"seq":153610,"id":"CVE-2026-89724","ts":1789285351493,"field":"cvss","old":null,"new":"7.8"},{"seq":153609,"id":"CVE-2026-89724","ts":1789285351493,"field":"severity","old":"none","new":"high"},{"seq":147219,"id":"CVE-2026-89724","ts":1789270202132,"field":"cvss","old":null,"new":"6.3"},{"seq":147218,"id":"CVE-2026-89724","ts":1789270202132,"field":"severity","old":"none","new":"medium"},{"seq":108964,"id":"CVE-2026-89724","ts":1789183729758,"field":"cvss","old":null,"new":"6.3"},{"seq":108963,"id":"CVE-2026-89724","ts":1789183729758,"field":"severity","old":"none","new":"medium"}]}