Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
16ecf6dff97ce0194a7126e26159492668d47a7e to < f7ae26c100a6c26c2a166d2c41e73188067b36bdaffected16ecf6dff97ce0194a7126e26159492668d47a7e to < 6ea647e76c44387d5c1c635df4604c2154d9060eaffected16ecf6dff97ce0194a7126e26159492668d47a7e to < d40838a63f2bd6a3df0a6cdd8ff1d5c6366e8fffaffected16ecf6dff97ce0194a7126e26159492668d47a7e to < e21cccc29b840930cd9dcfdf1139658063a681afaffected16ecf6dff97ce0194a7126e26159492668d47a7e to < 84cfebf7f4229d748cca8eb9c4e1f1c4099d3ab7affected16ecf6dff97ce0194a7126e26159492668d47a7e to < 8c14472431e27f13661d0db9d837156eaced0ecbaffected16ecf6dff97ce0194a7126e26159492668d47a7e to < b95315ffc66b39856396c1043618bb4e4d5785baaffected16ecf6dff97ce0194a7126e26159492668d47a7e to < cf4500ebf6fb57bf4ab83c3dd349a40257dbe2a9affected
Linux Linux
Default version status: affected
5.0affected0 to < 5.0unaffected5.10.270 to ≤ 5.10.*unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.109 to ≤ 6.12.*unaffected6.18.50 to ≤ 6.18.*unaffected7.2.4 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/f7ae26c100a6c26c2a166d2c41e73188067b36bd ↗
- https://git.kernel.org/stable/c/6ea647e76c44387d5c1c635df4604c2154d9060e ↗
- https://git.kernel.org/stable/c/d40838a63f2bd6a3df0a6cdd8ff1d5c6366e8fff ↗
- https://git.kernel.org/stable/c/e21cccc29b840930cd9dcfdf1139658063a681af ↗
- https://git.kernel.org/stable/c/84cfebf7f4229d748cca8eb9c4e1f1c4099d3ab7 ↗
- https://git.kernel.org/stable/c/8c14472431e27f13661d0db9d837156eaced0ecb ↗
- https://git.kernel.org/stable/c/b95315ffc66b39856396c1043618bb4e4d5785ba ↗
- https://git.kernel.org/stable/c/cf4500ebf6fb57bf4ab83c3dd349a40257dbe2a9 ↗