{"id":"CVE-2026-98025","title":"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-…","summary":"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-…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-787"],"vendor":"Linux","product":"Linux","affected":["Linux >= ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808 < d0c1ce6ef4cefe568e19afa83f543caa3c3c0873","Linux >= ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808 < 0dbc89e664b4609ad672b5bdeef60df251294b8f","Linux >= ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808 < 00520cdd21ea6a9b5dc8d53bbd241620d2059554","Linux >= ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808 < 59bf9e94bdc49557f07d87164269daff7340f4d6","Linux >= ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808 < 3bd689409bb1c93bdc6dd8ec6cbf5161bc4f0287","Linux >= ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808 < 659654654eb140851467af41d610473c100c7975","Linux >= ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808 < 237c9ae7145772af147e4665f158938350fa5658","Linux >= ca139d76b0d9e59d18f2d2ec8f0d81b82acd6808 < 5d50e90add8b4a978395e893e81954d19d58a7c5","Linux 5adf7fbdfa3e9e425b04771e1d64c4e184ad8fdb","Linux c1b187a86a176e42f5e48066556980e3232b6cab","Linux >= 4.19.322 < 4.20","Linux >= 5.4.284 < 5.5","Linux 5.10"],"published":"2026-09-25","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:18:25.540","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98025","references":[{"url":"https://git.kernel.org/stable/c/00520cdd21ea6a9b5dc8d53bbd241620d2059554","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/0dbc89e664b4609ad672b5bdeef60df251294b8f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/237c9ae7145772af147e4665f158938350fa5658","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3bd689409bb1c93bdc6dd8ec6cbf5161bc4f0287","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/59bf9e94bdc49557f07d87164269daff7340f4d6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5d50e90add8b4a978395e893e81954d19d58a7c5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/659654654eb140851467af41d610473c100c7975","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d0c1ce6ef4cefe568e19afa83f543caa3c3c0873","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98025.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98025"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541097"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98025"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98025"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98025.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-98025"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00231,"epssPercentile":0.13822,"cvssSource":"vendor","ingestedAt":"2026-09-25T11:06:38.876Z","slug":"CVE-2026-98025","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98025.json)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":212468,"id":"CVE-2026-98025","ts":1790668185005,"field":"cvss","old":null,"new":"7"},{"seq":212467,"id":"CVE-2026-98025","ts":1790668185005,"field":"severity","old":"none","new":"high"}]}