{"id":"CVE-2026-89879","summary":"media: s2255: bound JPEG frame size before copying into the buffer","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: s2255: bound JPEG frame size before copying into the buffer\n\ns2255_fillbuff() memcpy()s vc-\u003ejpg_size bytes of a captured JPEG/MJPEG\nframe into the vb2 plane.  vc-\u003ejpg_size is taken verbatim from the\nS2255_MARKER_FRAME header the device sends (pdword[4] in save_frame())\nand, unlike the frame payload length just above it, is never bounded:\n\n\tpayload = le32_to_cpu(pdword[3]);\n\tif (payload \u003e vc-\u003ereq_image_size)\t/* payload is checked ... */\n\t\treturn -EINVAL;\n\tvc-\u003epkt_size = payload;\n\tvc-\u003ejpg_size = le32_to_cpu(pdword[4]);\t/* ... jpg_size is not */\n\nA malicious or malfunctioning device can therefore report a jpg_size\nlarger than the destination vb2 plane, and the memcpy() writes past it.\njpg_size is a signed int, so a value with the top bit set also turns\ninto a huge length.\n\nReject a frame whose jpg_size is negative or exceeds the plane size\nbefore copying it.","modified":"2026-09-18T03:48:33.854768319Z","published":"2026-09-16T10:31:45.564Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89879.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2542516a147bfad740e7e411c251b639fad260ff"},{"type":"WEB","url":"https://git.kernel.org/stable/c/32a595dd3e8634544e5cfbc47f906dff3d3c1ef8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4b6f7bccc6559ae5c54573c284fe76eafc9989b2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/68d664f1b4efe525e99154b7058fcb0378bdaff7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d2ecaaab6a4f165abb54cdf61be60030b5782bf8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dd739517560c8d0ec4463a53e717bf40b988d7da"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e504cc888f42999dd76b6a43788c422610f2aad2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89879.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89879"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7"},{"fixed":"32a595dd3e8634544e5cfbc47f906dff3d3c1ef8"},{"fixed":"4b6f7bccc6559ae5c54573c284fe76eafc9989b2"},{"fixed":"2542516a147bfad740e7e411c251b639fad260ff"},{"fixed":"79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77"},{"fixed":"d2ecaaab6a4f165abb54cdf61be60030b5782bf8"},{"fixed":"68d664f1b4efe525e99154b7058fcb0378bdaff7"},{"fixed":"dd739517560c8d0ec4463a53e717bf40b988d7da"},{"fixed":"e504cc888f42999dd76b6a43788c422610f2aad2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89879.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.27"},{"fixed":"5.10.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89879.json"}}],"schema_version":"1.9.0"}