{"id":"CVE-2026-31623","state":"PUBLISHED","title":"net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()","description":"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->frags[] 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->frags overflow in RX path\") did for the\nt7xx driver.","publishedAt":"2026-04-24T14:42:40.566Z","updatedAt":"2026-06-14T17:43:10.837Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"6807ff49bf796b3823b1e29f97b69316a40a9a94","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"0c5c65a17db729fc63ab656bdaaf0e675a9dbeac","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"6053620fdbcd89fa7e755644efdaab78e0daaae7","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"d4e1946bea8d6441835eb3fd09b19237ba366a6f","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"a23b1b1aaf41e174181d5853a70e65d4d01e648c","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"c183d5775129a0a7495bd61a6e57ec230dcf01e5","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"ebf75c6301c4972a87542ebf2d994c6391eb5d46","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"9989938d13cc5ba8447eeed5a61acfcf61bc6801","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"600dc40554dc5ad1e6f3af51f700228033f43ea7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/cdc-phonet.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.31","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.31","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0.1","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/cdc-phonet.c"]}],"references":["https://git.kernel.org/stable/c/6807ff49bf796b3823b1e29f97b69316a40a9a94","https://git.kernel.org/stable/c/0c5c65a17db729fc63ab656bdaaf0e675a9dbeac","https://git.kernel.org/stable/c/6053620fdbcd89fa7e755644efdaab78e0daaae7","https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f","https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c","https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5","https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46","https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801","https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31623.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31623","state":"PUBLISHED","datePublished":"2026-04-24T14:42:40.566Z","dateUpdated":"2026-06-14T17:43:10.837Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.124Z"},"containers":{"cna":{"title":"net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()","descriptions":[{"lang":"en","value":"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->frags[] 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->frags overflow in RX path\") did for the\nt7xx driver."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"6807ff49bf796b3823b1e29f97b69316a40a9a94","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"0c5c65a17db729fc63ab656bdaaf0e675a9dbeac","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"6053620fdbcd89fa7e755644efdaab78e0daaae7","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"d4e1946bea8d6441835eb3fd09b19237ba366a6f","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"a23b1b1aaf41e174181d5853a70e65d4d01e648c","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"c183d5775129a0a7495bd61a6e57ec230dcf01e5","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"ebf75c6301c4972a87542ebf2d994c6391eb5d46","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"9989938d13cc5ba8447eeed5a61acfcf61bc6801","versionType":"git"},{"version":"87cf65601e1709e57f7e28f0f7b3eb0a992c1782","status":"affected","lessThan":"600dc40554dc5ad1e6f3af51f700228033f43ea7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/cdc-phonet.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.31","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.31","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0.1","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/cdc-phonet.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6807ff49bf796b3823b1e29f97b69316a40a9a94"},{"url":"https://git.kernel.org/stable/c/0c5c65a17db729fc63ab656bdaaf0e675a9dbeac"},{"url":"https://git.kernel.org/stable/c/6053620fdbcd89fa7e755644efdaab78e0daaae7"},{"url":"https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f"},{"url":"https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c"},{"url":"https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5"},{"url":"https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46"},{"url":"https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801"},{"url":"https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:43:10.837Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.6.136"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"7.0.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.31","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}