{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31616","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-03-09T15:48:24.123Z","datePublished":"2026-04-24T14:42:35.480Z","dateUpdated":"2026-05-11T22:12:15.268Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:12:15.268Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_phonet: fix skb frags[] overflow in pn_rx_complete()\n\nA broken/bored/mean USB host can overflow the skb_shared_info->frags[]\narray on a Linux gadget exposing a Phonet function by sending an\nunbounded sequence of full-page OUT transfers.\n\npn_rx_complete() finalizes the skb only when req->actual < req->length,\nwhere req->length is set to PAGE_SIZE by the gadget.  If the host always\nsends exactly PAGE_SIZE bytes per transfer, fp->rx.skb will never be\nreset and each completion will add another fragment via\nskb_add_rx_frag().  Once nr_frags exceeds MAX_SKB_FRAGS (default 17),\nsubsequent frag stores overwrite memory adjacent to the shinfo on the\nheap.\n\nDrop the skb and account a length error when the frag limit is reached,\nmatching the fix applied in t7xx by commit f0813bcd2d9d (\"net: wwan:\nt7xx: fix potential skb->frags overflow in RX path\")."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_phonet.c"],"versions":[{"version":"b91cd1440870f7a0649e570498b7b93caf9f781c","lessThan":"9ceff1251904901b0b4e5fe6350fcaffa368ce83","status":"affected","versionType":"git"},{"version":"b91cd1440870f7a0649e570498b7b93caf9f781c","lessThan":"c9315ce9da3632c591666a29de82d3e92d46bec1","status":"affected","versionType":"git"},{"version":"b91cd1440870f7a0649e570498b7b93caf9f781c","lessThan":"4e476c25bfcab0535ba7c76a903ae77ca8747711","status":"affected","versionType":"git"},{"version":"b91cd1440870f7a0649e570498b7b93caf9f781c","lessThan":"bd44ce09b9b569f49ed13e2d87d23d853fc7d6a7","status":"affected","versionType":"git"},{"version":"b91cd1440870f7a0649e570498b7b93caf9f781c","lessThan":"66f7471c4042e4eb300e30b5b9d87d1406862673","status":"affected","versionType":"git"},{"version":"b91cd1440870f7a0649e570498b7b93caf9f781c","lessThan":"c088d5dd2fffb4de1fb8e7f57751c8b82942180a","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_phonet.c"],"versions":[{"version":"2.6.32","status":"affected"},{"version":"0","lessThan":"2.6.32","status":"unaffected","versionType":"semver"},{"version":"6.6.136","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.83","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.24","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.14","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0.1","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.6.136"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"7.0.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.32","versionEndExcluding":"7.1-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/9ceff1251904901b0b4e5fe6350fcaffa368ce83"},{"url":"https://git.kernel.org/stable/c/c9315ce9da3632c591666a29de82d3e92d46bec1"},{"url":"https://git.kernel.org/stable/c/4e476c25bfcab0535ba7c76a903ae77ca8747711"},{"url":"https://git.kernel.org/stable/c/bd44ce09b9b569f49ed13e2d87d23d853fc7d6a7"},{"url":"https://git.kernel.org/stable/c/66f7471c4042e4eb300e30b5b9d87d1406862673"},{"url":"https://git.kernel.org/stable/c/c088d5dd2fffb4de1fb8e7f57751c8b82942180a"}],"title":"usb: gadget: f_phonet: fix skb frags[] overflow in pn_rx_complete()","x_generator":{"engine":"bippy-1.2.0"}}}}