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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89879
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-16 11:16:56 UTC
Updated2026-09-16 11:16:56 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 32a595dd3e8634544e5cfbc47f906dff3d3c1ef8 git Not specified
CNA Linux Linux affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 4b6f7bccc6559ae5c54573c284fe76eafc9989b2 git Not specified
CNA Linux Linux affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 2542516a147bfad740e7e411c251b639fad260ff git Not specified
CNA Linux Linux affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77 git Not specified
CNA Linux Linux affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 d2ecaaab6a4f165abb54cdf61be60030b5782bf8 git Not specified
CNA Linux Linux affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 68d664f1b4efe525e99154b7058fcb0378bdaff7 git Not specified
CNA Linux Linux affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 dd739517560c8d0ec4463a53e717bf40b988d7da git Not specified
CNA Linux Linux affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 e504cc888f42999dd76b6a43788c422610f2aad2 git Not specified
CNA Linux Linux affected 2.6.27 Not specified
CNA Linux Linux unaffected 2.6.27 semver Not specified
CNA Linux Linux unaffected 5.10.270 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.51 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.5 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/2542516a147bfad740e7e411c251b639fad260ff 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e504cc888f42999dd76b6a43788c422610f2aad2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dd739517560c8d0ec4463a53e717bf40b988d7da 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/32a595dd3e8634544e5cfbc47f906dff3d3c1ef8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d2ecaaab6a4f165abb54cdf61be60030b5782bf8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/68d664f1b4efe525e99154b7058fcb0378bdaff7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4b6f7bccc6559ae5c54573c284fe76eafc9989b2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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