{"id":"CVE-2026-31623","summary":"net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()\n\nA malicious USB device claiming to be a CDC Phonet modem can overflow\nthe skb_shared_info-\u003efrags[] array by sending an unbounded sequence of\nfull-page bulk transfers.\n\nDrop the skb and increment the length error when the frag limit is\nreached.  This matches the same fix that commit f0813bcd2d9d (\"net:\nwwan: t7xx: fix potential skb-\u003efrags overflow in RX path\") did for the\nt7xx driver.","modified":"2026-06-18T03:57:40.207098463Z","published":"2026-04-24T14:42:40.566Z","related":["CGA-6j9m-8h9q-w9m7","openSUSE-SU-2026:10703-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31623.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0c5c65a17db729fc63ab656bdaaf0e675a9dbeac"},{"type":"WEB","url":"https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6053620fdbcd89fa7e755644efdaab78e0daaae7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6807ff49bf796b3823b1e29f97b69316a40a9a94"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31623.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31623"},{"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":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782"},{"fixed":"6807ff49bf796b3823b1e29f97b69316a40a9a94"},{"fixed":"0c5c65a17db729fc63ab656bdaaf0e675a9dbeac"},{"fixed":"6053620fdbcd89fa7e755644efdaab78e0daaae7"},{"fixed":"d4e1946bea8d6441835eb3fd09b19237ba366a6f"},{"fixed":"a23b1b1aaf41e174181d5853a70e65d4d01e648c"},{"fixed":"c183d5775129a0a7495bd61a6e57ec230dcf01e5"},{"fixed":"ebf75c6301c4972a87542ebf2d994c6391eb5d46"},{"fixed":"9989938d13cc5ba8447eeed5a61acfcf61bc6801"},{"fixed":"600dc40554dc5ad1e6f3af51f700228033f43ea7"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31623.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.31"},{"fixed":"5.10.258"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.209"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.175"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.136"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.83"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.24"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.14"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.20.0"},{"fixed":"7.0.1"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31623.json"}}],"schema_version":"1.7.5"}