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CVE-2026-89879: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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Време до експлоатация

    Описание

    Оригинално описание

    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.

    Засегнати продукти

    • Linux Linux: 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 преди 32a595dd3e8634544e5cfbc47f906dff3d3c1ef8; 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 преди 4b6f7bccc6559ae5c54573c284fe76eafc9989b2; 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 преди 2542516a147bfad740e7e411c251b639fad260ff; 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 преди 79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77; 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 преди d2ecaaab6a4f165abb54cdf61be60030b5782bf8; 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 преди 68d664f1b4efe525e99154b7058fcb0378bdaff7; 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 преди dd739517560c8d0ec4463a53e717bf40b988d7da; 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 преди e504cc888f42999dd76b6a43788c422610f2aad2
    • Linux Linux: 2.6.27; преди 2.6.27; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.51 до 6.18.*; 7.2.5 до 7.2.*; от 7.3 нататък

    История

    • 16 септември 2026 Публикувано

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