CVE-2026-46027

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46027", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.093Z", "datePublished": "2026-05-27T12:56:35.628Z", "dateUpdated": "2026-10-19T19:26:41.717Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:29:12.274Z"}, "descriptions": [{"lang": "en", "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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "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 \u2014 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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/smc/smc_clc.c"], "versions": [{"version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "257cdf0c5ced9c0fba8aba501d94b0a5fcef2086", "status": "affected", "versionType": "git"}, {"version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "22546729b96fc873b23065dc49e3d73c45cfb874", "status": "affected", "versionType": "git"}, {"version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "5eedbfd82c2884e0010fdfb3c9446a6ebcadb691", "status": "affected", "versionType": "git"}, {"version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "f0858e1d5624bb120b198f2a8528f97a9b0ae069", "status": "affected", "versionType": "git"}, {"version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "6180a296ca65b08a81914805cbc0f78da5f10a1f", "status": "affected", "versionType": "git"}, {"version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "ea0b5d0fe96356dce38f98375a57c52a04e13712", "status": "affected", "versionType": "git"}, {"version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "83bcf9228b0501694fb2589ed1d142855a2887f2", "status": "affected", "versionType": "git"}, {"version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "5a8db80f721deee8e916c2cfdee78decda02ce4f", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/smc/smc_clc.c"], "versions": [{"version": "4.11", "status": "affected"}, {"version": "0", "lessThan": "4.11", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "4.11", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.12.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.18.27"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/257cdf0c5ced9c0fba8aba501d94b0a5fcef2086"}, {"url": "https://git.kernel.org/stable/c/22546729b96fc873b23065dc49e3d73c45cfb874"}, {"url": "https://git.kernel.org/stable/c/5eedbfd82c2884e0010fdfb3c9446a6ebcadb691"}, {"url": "https://git.kernel.org/stable/c/f0858e1d5624bb120b198f2a8528f97a9b0ae069"}, {"url": "https://git.kernel.org/stable/c/6180a296ca65b08a81914805cbc0f78da5f10a1f"}, {"url": "https://git.kernel.org/stable/c/ea0b5d0fe96356dce38f98375a57c52a04e13712"}, {"url": "https://git.kernel.org/stable/c/83bcf9228b0501694fb2589ed1d142855a2887f2"}, {"url": "https://git.kernel.org/stable/c/5a8db80f721deee8e916c2cfdee78decda02ce4f"}], "title": "net/smc: avoid early lgr access in smc_clc_wait_msg", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-46027", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:18:59.897964Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-617", "description": "CWE-617 Reachable Assertion"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T19:26:41.717Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-46027", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:18:59.897964Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-617", "description": "CWE-617 Reachable Assertion"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:19:07.381Z"}}], "cna": {"title": "net/smc: avoid early lgr access in smc_clc_wait_msg", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.5, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}, "scenarios": [{"lang": "en", "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 \u2014 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."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "257cdf0c5ced9c0fba8aba501d94b0a5fcef2086", "versionType": "git"}, {"status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "22546729b96fc873b23065dc49e3d73c45cfb874", "versionType": "git"}, {"status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "5eedbfd82c2884e0010fdfb3c9446a6ebcadb691", "versionType": "git"}, {"status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "f0858e1d5624bb120b198f2a8528f97a9b0ae069", "versionType": "git"}, {"status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "6180a296ca65b08a81914805cbc0f78da5f10a1f", "versionType": "git"}, {"status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "ea0b5d0fe96356dce38f98375a57c52a04e13712", "versionType": "git"}, {"status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "83bcf9228b0501694fb2589ed1d142855a2887f2", "versionType": "git"}, {"status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "lessThan": "5a8db80f721deee8e916c2cfdee78decda02ce4f", "versionType": "git"}], "programFiles": ["net/smc/smc_clc.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.11"}, {"status": "unaffected", "version": "0", "lessThan": "4.11", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.258", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.209", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.140", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.86", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.27", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.4", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/smc/smc_clc.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/257cdf0c5ced9c0fba8aba501d94b0a5fcef2086"}, {"url": "https://git.kernel.org/stable/c/22546729b96fc873b23065dc49e3d73c45cfb874"}, {"url": "https://git.kernel.org/stable/c/5eedbfd82c2884e0010fdfb3c9446a6ebcadb691"}, {"url": "https://git.kernel.org/stable/c/f0858e1d5624bb120b198f2a8528f97a9b0ae069"}, {"url": "https://git.kernel.org/stable/c/6180a296ca65b08a81914805cbc0f78da5f10a1f"}, {"url": "https://git.kernel.org/stable/c/ea0b5d0fe96356dce38f98375a57c52a04e13712"}, {"url": "https://git.kernel.org/stable/c/83bcf9228b0501694fb2589ed1d142855a2887f2"}, {"url": "https://git.kernel.org/stable/c/5a8db80f721deee8e916c2cfdee78decda02ce4f"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.258", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.209", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.175", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.140", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.86", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.27", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.4", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "4.11"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:29:12.274Z"}}}, "cveMetadata": {"cveId": "CVE-2026-46027", "state": "PUBLISHED", "dateUpdated": "2026-10-19T19:26:41.717Z", "dateReserved": "2026-05-13T15:03:33.093Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-05-27T12:56:35.628Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/smc/smc_clc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "257cdf0c5ced9c0fba8aba501d94b0a5fcef2086", "status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "versionType": "git"}, {"lessThan": "22546729b96fc873b23065dc49e3d73c45cfb874", "status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "versionType": "git"}, {"lessThan": "5eedbfd82c2884e0010fdfb3c9446a6ebcadb691", "status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "versionType": "git"}, {"lessThan": "f0858e1d5624bb120b198f2a8528f97a9b0ae069", "status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "versionType": "git"}, {"lessThan": "6180a296ca65b08a81914805cbc0f78da5f10a1f", "status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "versionType": "git"}, {"lessThan": "ea0b5d0fe96356dce38f98375a57c52a04e13712", "status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "versionType": "git"}, {"lessThan": "83bcf9228b0501694fb2589ed1d142855a2887f2", "status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "versionType": "git"}, {"lessThan": "5a8db80f721deee8e916c2cfdee78decda02ce4f", "status": "affected", "version": "0cfdd8f92cac01afbb12e4500514036a2b78756b", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/smc/smc_clc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.11"}, {"lessThan": "4.11", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.258", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.209", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.175", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.140", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.86", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.27", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "EDD978C9-3435-4AC5-AE97-062846CF653F", "versionEndExcluding": "5.10.258", "versionStartIncluding": "4.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "919C10A9-7951-4A74-BADD-C135A0A8D8B4", "versionEndExcluding": "5.15.209", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "92385813-D91D-480D-83A1-F423D2CBB2BA", "versionEndExcluding": "6.1.175", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A1A92866-F406-43B5-B2D1-CFC274753E9D", "versionEndExcluding": "6.6.140", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "55DA1C62-9991-451E-B8A8-E0004E00F789", "versionEndExcluding": "6.12.86", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A10AC84F-C058-47D5-85B4-E6E51A613B74", "versionEndExcluding": "6.18.27", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CDB78D6D-22C3-4154-B0D0-94AF1CE5C2E3", "versionEndExcluding": "7.0.4", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2026-46027", "lastModified": "2026-10-19T20:18:24.223", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46027", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:18:59.897964Z", "version": "2.0.3"}}]}, "published": "2026-05-27T14:17:21.303", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/22546729b96fc873b23065dc49e3d73c45cfb874"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/257cdf0c5ced9c0fba8aba501d94b0a5fcef2086"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5a8db80f721deee8e916c2cfdee78decda02ce4f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5eedbfd82c2884e0010fdfb3c9446a6ebcadb691"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6180a296ca65b08a81914805cbc0f78da5f10a1f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/83bcf9228b0501694fb2589ed1d142855a2887f2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ea0b5d0fe96356dce38f98375a57c52a04e13712"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f0858e1d5624bb120b198f2a8528f97a9b0ae069"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-617"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: net/smc: avoid early lgr access in smc_clc_wait_msg", "id": "2482168", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482168"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-366", "details": ["A flaw was found in the Linux kernel's `net/smc` component. A remote attacker could exploit this by sending a Connection Less Connection (CLC) decline message during an early handshake stage. This causes the system to attempt to update link-group level synchronization state before it is properly initialized. This could lead to incorrect state management or unexpected system behavior."], "name": "CVE-2026-46027", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46027\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46027\nhttps://lore.kernel.org/linux-cve-announce/2026052748-CVE-2026-46027-91a3@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0cfdd8f92cac01afbb12e4500514036a2b78756b,f0858e1d5624bb120b198f2a8528f97a9b0ae069)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0cfdd8f92cac01afbb12e4500514036a2b78756b,6180a296ca65b08a81914805cbc0f78da5f10a1f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0cfdd8f92cac01afbb12e4500514036a2b78756b,ea0b5d0fe96356dce38f98375a57c52a04e13712)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0cfdd8f92cac01afbb12e4500514036a2b78756b,83bcf9228b0501694fb2589ed1d142855a2887f2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0cfdd8f92cac01afbb12e4500514036a2b78756b,5a8db80f721deee8e916c2cfdee78decda02ce4f)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.11"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.140,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.86,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.27,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.4,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-27T22:45:44.574116+00:00", "updated": "2026-10-19T22:45:04.825109+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-366", "CWE-617"]}