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CVE-2026-89724

media: vicodec: fix out-of-bounds write in FWHT encoder

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: media: vicodec: fix out-of-bounds write in FWHT encoder vidioc_s_fmt_vid_out() sizes the encoder CAPTURE buffer from the compressed descriptor pixfmt_fwht, whose sizeimage_mult is 3: coded_w * coded_h * 3 + sizeof(struct fwht_cframe_hdr). fwht_encode_frame() encodes one plane per component, and an incompressible plane takes the FWHT_FRAME_UNENCODED path in encode_plane(), copying the plane verbatim. For a 4-component pixel format all four planes are full resolution (width_div == height_div == 1), so a frame that forces every plane through the unencoded fallback writes sizeof(struct fwht_cframe_hdr) + 4 * coded_w * coded_h bytes, overrunning the plane by coded_w * coded_h, which can result in corruption of adjacent kernel heap memory. Bump pixfmt_fwht.sizeimage_mult from 3 to 4, matching the largest components_num among the supported raw formats, so the capture buffer is always large enough for the unencoded fallback.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 16ecf6dff97ce0194a7126e26159492668d47a7e · fixed in f7ae26c100a6c26c2a166d2c41e73188067b36bd; From 16ecf6dff97ce0194a7126e26159492668d47a7e · fixed in 6ea647e76c44387d5c1c635df4604c2154d9060e; From 16ecf6dff97ce0194a7126e26159492668d47a7e · fixed in d40838a63f2bd6a3df0a6cdd8ff1d5c6366e8fff; From 16ecf6dff97ce0194a7126e26159492668d47a7e · fixed in e21cccc29b840930cd9dcfdf1139658063a681af; From 16ecf6dff97ce0194a7126e26159492668d47a7e · fixed in 84cfebf7f4229d748cca8eb9c4e1f1c4099d3ab7; From 16ecf6dff97ce0194a7126e26159492668d47a7e · fixed in 8c14472431e27f13661d0db9d837156eaced0ecb; From 16ecf6dff97ce0194a7126e26159492668d47a7e · fixed in b95315ffc66b39856396c1043618bb4e4d5785ba; From 16ecf6dff97ce0194a7126e26159492668d47a7e · fixed in cf4500ebf6fb57bf4ab83c3dd349a40257dbe2a9

  • Linux Linux

    5.0

  • KernelLinux

    From 5.0.0 · fixed in 5.10.270; From 5.11.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.109; From 6.13.0 · fixed in 6.18.50; From 6.19.0 · fixed in 7.2.4

References 8

git.kernel.org