{ "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": "2026-10-19T09:12:30.354Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:12:30.354Z" }, "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", "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" }, { "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" } } } }