{"schema":"threatline.record/2","record":{"id":"CVE-2026-98025","aliases":[],"summary":"net: usb: cx82310_eth: drop URB after 0xffff reboot sentinel to prevent partial_data heap overflow","details":"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.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98025","source_modified_at":"2026-10-19T09:12:30.354Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","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"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98025","source_modified_at":"2026-10-19T09:12:30.354Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","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","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98025","source_modified_at":"2026-10-19T09:12:30.354Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0dbc89e664b4609ad672b5bdeef60df251294b8f","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98025","source_modified_at":"2026-10-19T09:12:30.354Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"00520cdd21ea6a9b5dc8d53bbd241620d2059554","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98025","source_modified_at":"2026-10-19T09:12:30.354Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"59bf9e94bdc49557f07d87164269daff7340f4d6","basis":"first unaffected version stated in the CVE record"},{"source":"CVE 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record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.0023,"percentile":0.13113,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:23:43.906Z","modified_at":"2026-10-19T09:12:30.354Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98025","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:12:30.354Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98025","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/d0c1ce6ef4cefe568e19afa83f543caa3c3c0873"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0dbc89e664b4609ad672b5bdeef60df251294b8f"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/00520cdd21ea6a9b5dc8d53bbd241620d2059554"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/59bf9e94bdc49557f07d87164269daff7340f4d6"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/3bd689409bb1c93bdc6dd8ec6cbf5161bc4f0287"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/659654654eb140851467af41d610473c100c7975"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/237c9ae7145772af147e4665f158938350fa5658"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5d50e90add8b4a978395e893e81954d19d58a7c5"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:12:30.354Z","content_hash":"fe63b29d77d926ef983bbfd9f1a84cbae7d6f5ee5f09526f609aa622ca1b4aa7"}}