310 lines
15 KiB
JSON
310 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-2026-46027",
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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": "2026-05-13T15:03:33.093Z",
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"datePublished": "2026-05-27T12:56:35.628Z",
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"dateUpdated": "2026-10-19T19:26:41.717Z"
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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": "2026-08-05T12:29:12.274Z"
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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/smc: avoid early lgr access in smc_clc_wait_msg\n\nA CLC decline can be received while the handshake is still in an early\nstage, before the connection has been associated with a link group.\n\nThe decline handling in smc_clc_wait_msg() updates link-group level sync\nstate for first-contact declines, but that state only exists after link\ngroup setup has completed. Guard the link-group update accordingly and\nkeep the per-socket peer diagnosis handling unchanged.\n\nThis preserves the existing sync_err handling for established link-group\ncontexts and avoids touching link-group state before it is available."
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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:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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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 SMC CLC handshake runs over a TCP connection; a remote peer (a malicious client connecting to a listening SMC server, or a malicious server) triggers the dereference by sending a crafted DECLINE message, so the code is reachable purely over the network.\nAC:L - The attacker reliably crafts a DECLINE message with the SMC_FIRST_CONTACT_MASK bit set; the lgr==NULL condition is the default early-handshake state (the first message the server processes), so there is no race or condition outside attacker control.\nPR:N - On the server-side listen path the dereference occurs while processing the very first handshake message, before any authentication, so an unauthenticated remote peer requires no privileges.\nUI:N - A server with an AF_SMC listening socket processes the malicious handshake passively in a work queue with no local user action required.\nS:U - The crash is confined to the kernel's own security scope; no boundary (VM/IOMMU/sandbox) is crossed.\nC:N - This is a NULL pointer dereference with no information disclosure — no kernel memory contents are read or leaked.\nI:N - The write is to NULL plus a small fixed bitfield offset on a never-initialized pointer (not a controllable/dangling pointer), so it only crashes and provides no exploitable write primitive.\nA:H - Dereferencing the NULL lgr pointer causes a kernel oops/panic, taking down the system in a remotely-triggerable, unauthenticated denial of service."
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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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"net/smc/smc_clc.c"
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],
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"versions": [
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{
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"version": "0cfdd8f92cac01afbb12e4500514036a2b78756b",
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"lessThan": "257cdf0c5ced9c0fba8aba501d94b0a5fcef2086",
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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": "0cfdd8f92cac01afbb12e4500514036a2b78756b",
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"lessThan": "22546729b96fc873b23065dc49e3d73c45cfb874",
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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": "0cfdd8f92cac01afbb12e4500514036a2b78756b",
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"lessThan": "5eedbfd82c2884e0010fdfb3c9446a6ebcadb691",
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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": "0cfdd8f92cac01afbb12e4500514036a2b78756b",
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"lessThan": "f0858e1d5624bb120b198f2a8528f97a9b0ae069",
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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": "0cfdd8f92cac01afbb12e4500514036a2b78756b",
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"lessThan": "6180a296ca65b08a81914805cbc0f78da5f10a1f",
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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": "0cfdd8f92cac01afbb12e4500514036a2b78756b",
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"lessThan": "ea0b5d0fe96356dce38f98375a57c52a04e13712",
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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": "0cfdd8f92cac01afbb12e4500514036a2b78756b",
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"lessThan": "83bcf9228b0501694fb2589ed1d142855a2887f2",
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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": "0cfdd8f92cac01afbb12e4500514036a2b78756b",
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"lessThan": "5a8db80f721deee8e916c2cfdee78decda02ce4f",
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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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"net/smc/smc_clc.c"
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],
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"versions": [
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{
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"version": "4.11",
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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": "4.11",
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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": "6.6.140",
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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": "6.12.86",
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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": "6.18.27",
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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": "7.0.4",
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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": "4.11",
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"versionEndExcluding": "5.10.258"
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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": "5.15.209"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "6.1.175"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/257cdf0c5ced9c0fba8aba501d94b0a5fcef2086"
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},
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{
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"url": "https://git.kernel.org/stable/c/22546729b96fc873b23065dc49e3d73c45cfb874"
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},
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{
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"url": "https://git.kernel.org/stable/c/5eedbfd82c2884e0010fdfb3c9446a6ebcadb691"
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},
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{
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"url": "https://git.kernel.org/stable/c/f0858e1d5624bb120b198f2a8528f97a9b0ae069"
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},
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{
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"url": "https://git.kernel.org/stable/c/6180a296ca65b08a81914805cbc0f78da5f10a1f"
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},
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{
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"url": "https://git.kernel.org/stable/c/ea0b5d0fe96356dce38f98375a57c52a04e13712"
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},
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{
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"url": "https://git.kernel.org/stable/c/83bcf9228b0501694fb2589ed1d142855a2887f2"
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},
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{
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"url": "https://git.kernel.org/stable/c/5a8db80f721deee8e916c2cfdee78decda02ce4f"
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}
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],
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"title": "net/smc: avoid early lgr access in smc_clc_wait_msg",
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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-2026-46027",
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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": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:18:59.897964Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-617",
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"description": "CWE-617 Reachable Assertion"
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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": "2026-10-19T19:26:41.717Z"
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}
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}
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]
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}
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} |