Answer in brief
CVE-2026-89879 records a Unknown severity vulnerability in media: s2255: bound JPEG frame size before copying into the buffer. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 <32a595dd3e8634544e5cfbc47f906dff3d3c1ef8 || >=38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 <4b6f7bccc6559ae5c54573c284fe76eafc9989b2 || >=38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 <2542516a147bfad740e7e411c251b639fad260ff || >=38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 <79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77 || >=38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 <d2ecaaab6a4f165abb54cdf61be60030b5782bf8 || >=38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 <68d664f1b4efe525e99154b7058fcb0378bdaff7 || >=38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 <dd739517560c8d0ec4463a53e717bf40b988d7da || >=38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 <e504cc888f42999dd76b6a43788c422610f2aad2 | 32a595dd3e8634544e5cfbc47f906dff3d3c1ef8, 4b6f7bccc6559ae5c54573c284fe76eafc9989b2, 2542516a147bfad740e7e411c251b639fad260ff, 79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77, d2ecaaab6a4f165abb54cdf61be60030b5782bf8, 68d664f1b4efe525e99154b7058fcb0378bdaff7, dd739517560c8d0ec4463a53e717bf40b988d7da, e504cc888f42999dd76b6a43788c422610f2aad2 |
| Linux/Linuxgeneric | 2.6.27 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
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.
Quoted source text, attributed separately from HOL analysis.