298 lines
15 KiB
JSON
298 lines
15 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-2026-72351",
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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": "2026-08-09T03:40:39.921Z",
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"datePublished": "2026-08-15T05:55:54.150Z",
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"dateUpdated": "2026-10-16T18:55:19.979Z"
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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": "2026-08-17T05:43:08.849Z"
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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\ngue: validate REMCSUM private option length\n\nGUE private flags can indicate that remote checksum offload metadata is\npresent. The private flags field itself is accounted for by\nguehdr_flags_len(), but guehdr_priv_flags_len() currently returns 0 even\nwhen GUE_PFLAG_REMCSUM is set.\n\nThis lets a packet with only the private flags field pass\nvalidate_gue_flags(), after which gue_remcsum() and gue_gro_remcsum()\nread the missing REMCSUM start/offset fields from the following bytes.\n\nAccount for GUE_PLEN_REMCSUM when GUE_PFLAG_REMCSUM is present so that\nmalformed packets are rejected during option validation."
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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 - Malformed GUE-over-UDP packets reach gue_udp_recv() and gue_gro_receive() through the normal IP/UDP receive path on hosts with FOU/GUE listeners, including internet-facing cloud overlay endpoints.\nAC:L - An attacker fully controls the crafted packet and can set GUE_PFLAG_REMCSUM with only the private-flags option present, reliably triggering gue_remcsum()/gue_gro_remcsum() without races or special timing.\nPR:N - Exploitation requires only sending UDP to a GUE listener port; no target credentials or local privileges are needed by the remote attacker even though tunnel setup itself requires admin configuration.\nUI:N - No victim interaction is required beyond the host already receiving GUE tunnel traffic as part of normal overlay networking operation.\nS:U - The flaw corrupts kernel packet buffers during GUE receive processing on the target host and does not inherently cross VM, container, or IOMMU security boundaries.\nC:H - Missing REMCSUM length validation lets attacker-controlled start/offset drive remcsum_adjust()/csum_partial() to read beyond the declared GUE options into adjacent skb bytes, enabling memory disclosure primitives.\nI:H - remcsum_adjust() performs an out-of-bounds 2-byte write at ptr+offset, and the default partial-checksum path stores attacker-controlled csum_start/csum_offset metadata that can corrupt subsequent checksum offload handling.\nA:H - Out-of-bounds REMCSUM processing can trigger kernel oops or panic from invalid memory access or corrupted packet state, causing denial of service on overlay endpoints under repeated attack."
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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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"include/net/gue.h"
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],
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"versions": [
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{
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"version": "c1aa8347e73e4092411fbd96cc59531fb7e76d04",
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"lessThan": "158b9995d3c87f3b93f5c22df54a12e12a3438b3",
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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": "c1aa8347e73e4092411fbd96cc59531fb7e76d04",
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"lessThan": "7c6876ec1b227261b51803f784c7be1b2242a1a0",
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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": "c1aa8347e73e4092411fbd96cc59531fb7e76d04",
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"lessThan": "2c4de9988e9ddc760b750d6b6e701c35ff60ad14",
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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": "c1aa8347e73e4092411fbd96cc59531fb7e76d04",
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"lessThan": "2a99224c120823987e4d829726f4ecb33e03fc1e",
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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": "c1aa8347e73e4092411fbd96cc59531fb7e76d04",
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"lessThan": "61e78679c7c9ca685bff58e4b6348304dc60aafd",
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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": "c1aa8347e73e4092411fbd96cc59531fb7e76d04",
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"lessThan": "4a4a1d41c6e901e773bcf795f562a47fa71f692a",
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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": "c1aa8347e73e4092411fbd96cc59531fb7e76d04",
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"lessThan": "f618cbe9b24cd0202004d2db781d5f80ab77037f",
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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": "c1aa8347e73e4092411fbd96cc59531fb7e76d04",
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"lessThan": "d335dcc6f521571d57117b8deeebc940836e5450",
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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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"include/net/gue.h"
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],
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"versions": [
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{
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"version": "3.19",
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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": "3.19",
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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": "5.10.261",
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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": "5.15.212",
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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": "6.1.178",
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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": "6.6.145",
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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": "6.12.97",
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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": "6.18.40",
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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": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "3.19",
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"versionEndExcluding": "5.10.261"
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},
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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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"versionEndExcluding": "5.15.212"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.19",
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"versionEndExcluding": "6.1.178"
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"versionEndExcluding": "6.6.145"
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"versionEndExcluding": "7.1.5"
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/158b9995d3c87f3b93f5c22df54a12e12a3438b3"
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},
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{
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"url": "https://git.kernel.org/stable/c/7c6876ec1b227261b51803f784c7be1b2242a1a0"
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},
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{
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"url": "https://git.kernel.org/stable/c/2c4de9988e9ddc760b750d6b6e701c35ff60ad14"
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},
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{
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"url": "https://git.kernel.org/stable/c/2a99224c120823987e4d829726f4ecb33e03fc1e"
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},
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{
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"url": "https://git.kernel.org/stable/c/61e78679c7c9ca685bff58e4b6348304dc60aafd"
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},
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{
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"url": "https://git.kernel.org/stable/c/4a4a1d41c6e901e773bcf795f562a47fa71f692a"
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},
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{
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"url": "https://git.kernel.org/stable/c/f618cbe9b24cd0202004d2db781d5f80ab77037f"
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},
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{
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"url": "https://git.kernel.org/stable/c/d335dcc6f521571d57117b8deeebc940836e5450"
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}
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],
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"title": "gue: validate REMCSUM private option length",
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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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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-72351",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T18:47:48.615145Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-16T18:55:19.979Z"
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}
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}
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]
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}
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} |