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CVE-2026-89879

media: s2255: bound JPEG frame size before copying into the buffer

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: media: s2255: bound JPEG frame size before copying into the buffer s2255_fillbuff() memcpy()s vc->jpg_size bytes of a captured JPEG/MJPEG frame into the vb2 plane. vc->jpg_size is taken verbatim from the S2255_MARKER_FRAME header the device sends (pdword[4] in save_frame()) and, unlike the frame payload length just above it, is never bounded: payload = le32_to_cpu(pdword[3]); if (payload > vc->req_image_size) /* payload is checked ... */ return -EINVAL; vc->pkt_size = payload; vc->jpg_size = le32_to_cpu(pdword[4]); /* ... jpg_size is not */ A malicious or malfunctioning device can therefore report a jpg_size larger than the destination vb2 plane, and the memcpy() writes past it. jpg_size is a signed int, so a value with the top bit set also turns into a huge length. Reject a frame whose jpg_size is negative or exceeds the plane size before copying it.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 · fixed in 32a595dd3e8634544e5cfbc47f906dff3d3c1ef8; From 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 · fixed in 4b6f7bccc6559ae5c54573c284fe76eafc9989b2; From 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 · fixed in 2542516a147bfad740e7e411c251b639fad260ff; From 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 · fixed in 79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77; From 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 · fixed in d2ecaaab6a4f165abb54cdf61be60030b5782bf8; From 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 · fixed in 68d664f1b4efe525e99154b7058fcb0378bdaff7; From 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 · fixed in dd739517560c8d0ec4463a53e717bf40b988d7da; From 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 · fixed in e504cc888f42999dd76b6a43788c422610f2aad2

  • Linux Linux

    2.6.27

  • KernelLinux

    From 2.6.27 · 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 6.12.110; From 6.13.0 · fixed in 6.18.51; From 6.19.0 · fixed in 7.2.5

References 8

git.kernel.org