CVE-2026-89879media: s2255: bound JPEG frame size before copying into the buffer
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 builds before 32a595dd3e8634544e5cfbc47f906dff3d3c1ef8; 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 builds before 4b6f7bccc6559ae5c54573c284fe76eafc9989b2; from 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before 2542516a147bfad740e7e411c251b639fad260ff; from 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before 79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77; from 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before d2ecaaab6a4f165abb54cdf61be60030b5782bf8; from 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before 68d664f1b4efe525e99154b7058fcb0378bdaff7; from 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before dd739517560c8d0ec4463a53e717bf40b988d7da; from 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before e504cc888f42999dd76b6a43788c422610f2aad2 | CNA record |
References
- https://git.kernel.org/stable/c/32a595dd3e8634544e5cfbc47f906dff3d3c1ef8
- https://git.kernel.org/stable/c/4b6f7bccc6559ae5c54573c284fe76eafc9989b2
- https://git.kernel.org/stable/c/2542516a147bfad740e7e411c251b639fad260ff
- https://git.kernel.org/stable/c/79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77
- https://git.kernel.org/stable/c/d2ecaaab6a4f165abb54cdf61be60030b5782bf8
- https://git.kernel.org/stable/c/68d664f1b4efe525e99154b7058fcb0378bdaff7
- https://git.kernel.org/stable/c/dd739517560c8d0ec4463a53e717bf40b988d7da
- https://git.kernel.org/stable/c/e504cc888f42999dd76b6a43788c422610f2aad2
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.