264 lines
14 KiB
JSON
264 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-64056",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-07-19T07:54:57.030Z",
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"datePublished": "2026-07-19T15:39:37.673Z",
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"dateUpdated": "2026-08-05T12:38:45.763Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:38:45.763Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: cortina: Make RX SKB per-port\n\nThe SKB used to assemble packets from fragments in gmac_rx()\nis static local, but the Gemini has two ethernet ports, meaning\nthere can be races between the ports on a bad day if a device\nis using both.\n\nMake the RX SKB a per-port variable and carry it over between\ninvocations in the port struct instead.\n\nZero the pointer once we call napi_gro_frags(), on error (after\ncalling napi_free_frags()) or if the port is stopped.\n\nZero it in some place where not strictly necessary just to\nemphasize what is going on.\n\nThis was found by Sashiko during normal patch review."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The vulnerable code runs in the netdev RX path (gmac_irq → napi_schedule → gmac_napi_poll → gmac_rx) when Ethernet frames are DMA'd from the wire, so any remote host that can send packets to a reachable Gemini GMAC interface can trigger it.\nAC:L - An attacker controls both sides of the race by flooding one or both GMAC ports with multi-descriptor/jumbo frames to keep skb assembly in progress while concurrent NAPI polls run on the independent per-port IRQ handlers without serialization on the shared static skb pointer.\nPR:N - Exploitation requires only the ability to deliver Ethernet frames to an active interface; there are no authentication gates, capability checks, or local syscalls on the RX path from hardware interrupt through gmac_rx().\nUI:N - Triggering the race requires only crafted or high-volume network traffic; no victim interaction such as mounting a filesystem or opening a file is needed.\nS:U - The corruption is confined to kernel networking state (shared skb assembly between the two GMAC ports on the same host); impact does not cross a VM, IOMMU, or sandbox security boundary.\nC:H - Concurrent corruption of a shared skb and mismatched napi_get_frags/napi_gro_frags/napi_free_frags usage across ports can cause use-after-free and skb metadata corruption that enables arbitrary kernel memory disclosure.\nI:H - Cross-port skb corruption via concurrent skb_fill_page_desc and len updates, plus orphaned or double-freed skb/page state, provides memory corruption primitives that can be leveraged for arbitrary kernel writes or code execution.\nA:H - The race can cause kernel oopses or panics from slab/list corruption, invalid page refcount handling, or crashes inside napi_gro_frags when skb state is corrupted across the two ports."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/ethernet/cortina/gemini.c"
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],
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"versions": [
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{
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"version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
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"lessThan": "27856d533eca3804008695f61c1e4d5ff984196b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
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"lessThan": "b6b22824b30e48ce1df3a2e80990f4b8505deb50",
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"status": "affected",
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},
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{
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"version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
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"lessThan": "6bba24e9ebe6f1c0b356cd471e36bdc7fa434897",
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"status": "affected",
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"lessThan": "3b249988d774dacf13b203817e971934a42243c4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
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"lessThan": "72158ea185b27afae163949b0e86164cb6b64e55",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
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"lessThan": "cfd62907f3cdbc3b6da8f49ba907c0390018fe5e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
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"lessThan": "67a35e7da7ef9d2f000aa758552a128324c604a0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
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"lessThan": "06937db21ee311ed07eba47954447245041a982d",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/ethernet/cortina/gemini.c"
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],
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"versions": [
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{
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"version": "4.16",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.16",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.258",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.209",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.175",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.142",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.92",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.34",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.0.11",
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"lessThanOrEqual": "7.0.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.16",
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"versionEndExcluding": "5.10.258"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/27856d533eca3804008695f61c1e4d5ff984196b"
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},
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{
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"url": "https://git.kernel.org/stable/c/b6b22824b30e48ce1df3a2e80990f4b8505deb50"
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},
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{
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"url": "https://git.kernel.org/stable/c/6bba24e9ebe6f1c0b356cd471e36bdc7fa434897"
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},
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{
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"url": "https://git.kernel.org/stable/c/3b249988d774dacf13b203817e971934a42243c4"
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},
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{
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"url": "https://git.kernel.org/stable/c/72158ea185b27afae163949b0e86164cb6b64e55"
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},
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{
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"url": "https://git.kernel.org/stable/c/cfd62907f3cdbc3b6da8f49ba907c0390018fe5e"
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},
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{
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"url": "https://git.kernel.org/stable/c/67a35e7da7ef9d2f000aa758552a128324c604a0"
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},
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{
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"url": "https://git.kernel.org/stable/c/06937db21ee311ed07eba47954447245041a982d"
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}
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],
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"title": "net: ethernet: cortina: Make RX SKB per-port",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |