{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98025","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:19:56.070Z","datePublished":"2026-09-25T10:23:43.906Z","dateUpdated":"2026-10-03T11:01:43.969Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-03T11:01:43.969Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: cx82310_eth: drop URB after 0xffff reboot sentinel to prevent partial_data heap overflow\n\nThe 0xffff length sentinel detects a router reboot and schedules\nre-enabling of ethernet mode, but then falls through to the rest\nof the loop body.  The next check is\n\n\t} else if (len > CX82310_MTU) {\n\nwhich is the else of the just-matched if -- it never fires for\nlen == 0xffff.  The MTU bound that normally caps the\nincomplete-packet save path is silently bypassed.\n\nWith 0xffff > skb->len always true (rx_urb_size is 4096), the\nincomplete-packet branch saves dev->partial_len = skb->len bytes\ninto dev->partial_data.  partial_data is kmalloc(hard_mtu) =\nkmalloc(CX82310_MTU + 2) = 1516 bytes, but skb->len after the\n2-byte header pull can be up to 4094.  A device that sends a\n4096-byte URB starting with [0xff 0xff] therefore copies 4094\ndevice-provided bytes into a buffer allocated for 1516 bytes,\nexceeding its requested size by 2578 bytes.\n\nThe next URB then reads dev->partial_len (4094) back from the same\n1516-byte buffer and dev->partial_rem (65535 - 4094 = 61441) from\nthe new URB's ~4KB skb, both well past their allocations, and\ndelivers the spliced result as a 64KB \"frame\" to the network\nstack.\n\nBail out of rx_fixup after scheduling the re-enable work; the\nremainder of a reboot-marker URB is not meaningful packet data.\nThis restores the invariant that partial_len < CX82310_MTU + 2 on\nthe save path, since every other route there has already passed\nthe MTU check."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/cx82310_eth.c"],"versions":[{"version":"ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808","lessThan":"d0c1ce6ef4cefe568e19afa83f543caa3c3c0873","status":"affected","versionType":"git"},{"version":"ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808","lessThan":"0dbc89e664b4609ad672b5bdeef60df251294b8f","status":"affected","versionType":"git"},{"version":"ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808","lessThan":"00520cdd21ea6a9b5dc8d53bbd241620d2059554","status":"affected","versionType":"git"},{"version":"ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808","lessThan":"59bf9e94bdc49557f07d87164269daff7340f4d6","status":"affected","versionType":"git"},{"version":"ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808","lessThan":"3bd689409bb1c93bdc6dd8ec6cbf5161bc4f0287","status":"affected","versionType":"git"},{"version":"ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808","lessThan":"659654654eb140851467af41d610473c100c7975","status":"affected","versionType":"git"},{"version":"ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808","lessThan":"237c9ae7145772af147e4665f158938350fa5658","status":"affected","versionType":"git"},{"version":"ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808","lessThan":"5d50e90add8b4a978395e893e81954d19d58a7c5","status":"affected","versionType":"git"},{"version":"5adf7fbdfa3e9e425b04771e1d64c4e184ad8fdb","status":"affected","versionType":"git"},{"version":"c1b187a86a176e42f5e48066556980e3232b6cab","status":"affected","versionType":"git"},{"version":"4.19.322","lessThan":"4.20","status":"affected","versionType":"semver"},{"version":"5.4.284","lessThan":"5.5","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/cx82310_eth.c"],"versions":[{"version":"5.10","status":"affected"},{"version":"0","lessThan":"5.10","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.111","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc3","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":"5.10","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.3-rc3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.322"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.284"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/d0c1ce6ef4cefe568e19afa83f543caa3c3c0873"},{"url":"https://git.kernel.org/stable/c/0dbc89e664b4609ad672b5bdeef60df251294b8f"},{"url":"https://git.kernel.org/stable/c/00520cdd21ea6a9b5dc8d53bbd241620d2059554"},{"url":"https://git.kernel.org/stable/c/59bf9e94bdc49557f07d87164269daff7340f4d6"},{"url":"https://git.kernel.org/stable/c/3bd689409bb1c93bdc6dd8ec6cbf5161bc4f0287"},{"url":"https://git.kernel.org/stable/c/659654654eb140851467af41d610473c100c7975"},{"url":"https://git.kernel.org/stable/c/237c9ae7145772af147e4665f158938350fa5658"},{"url":"https://git.kernel.org/stable/c/5d50e90add8b4a978395e893e81954d19d58a7c5"}],"title":"net: usb: cx82310_eth: drop URB after 0xffff reboot sentinel to prevent partial_data heap overflow","x_generator":{"engine":"bippy-1.2.0"}}}}