CVE-2022-49234

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-49234", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.294Z", "datePublished": "2025-02-26T01:55:59.615Z", "dateUpdated": "2026-08-05T08:54:26.338Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:54:26.338Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: Avoid cross-chip syncing of VLAN filtering\n\nChanges to VLAN filtering are not applicable to cross-chip\nnotifications.\n\nOn a system like this:\n\n.-----. .-----. .-----.\n| sw1 +---+ sw2 +---+ sw3 |\n'-1-2-' '-1-2-' '-1-2-'\n\nBefore this change, upon sw1p1 leaving a bridge, a call to\ndsa_port_vlan_filtering would also be made to sw2p1 and sw3p1.\n\nIn this scenario:\n\n.---------. .-----. .-----.\n| sw1 +---+ sw2 +---+ sw3 |\n'-1-2-3-4-' '-1-2-' '-1-2-'\n\nWhen sw1p4 would leave a bridge, dsa_port_vlan_filtering would be\ncalled for sw2 and sw3 with a non-existing port - leading to array\nout-of-bounds accesses and crashes on mv88e6xxx."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - Exploitation requires local netlink/ioctl bridge configuration (enslave a DSA user port then leave the bridge); the buggy path is not reachable from remote packet processing.\nAC:L - On a multi-chip DSA fabric with unequal port counts (the severe but realistic deployment), an attacker who can configure bridges can reliably trigger the OOB by enabling vlan_filtering, joining a high-indexed port, then removing it\u2014no conditions outside attacker control.\nPR:L - Triggering requires CAP_NET_ADMIN to manipulate bridge membership of DSA ports; per kernel CNA guidance that capability is treated as Low when obtainable in a user/network namespace that holds those ports, not full init-namespace root beyond that.\nUI:N - The attacker performs the bridge join/leave operations themselves; no separate victim action is required.\nS:U - Impact is confined to the host kernel/DSA subsystem; this is not a VM escape, IOMMU bypass, or other cross-authority boundary crossing.\nC:H - The bug is an out-of-bounds access on the dsa_switch flexible ports array (and related structures), which reads past the allocation and can disclose adjacent kernel memory.\nI:H - For drivers without vlan_filtering_is_global (including mv88e6xxx), dsa_port_vlan_filtering writes dp->vlan_filtering through the OOB port pointer, producing an out-of-bounds write exploitable for memory corruption.\nA:H - The same OOB/NULL path causes kernel oops/crashes on mv88e6xxx and peer switches when a non-existent port index is used, fully disrupting system availability."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/dsa/switch.c"], "versions": [{"version": "d371b7c92d190448f3ccbf082c90bf929285f648", "lessThan": "e1f2a4dd8d433eec393d09273a78a3d3551339cf", "status": "affected", "versionType": "git"}, {"version": "d371b7c92d190448f3ccbf082c90bf929285f648", "lessThan": "108dc8741c203e9d6ce4e973367f1bac20c7192b", "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/dsa/switch.c"], "versions": [{"version": "5.2", "status": "affected"}, {"version": "0", "lessThan": "5.2", "status": "unaffected", "versionType": "semver"}, {"version": "5.17.2", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18", "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": "5.2", "versionEndExcluding": "5.17.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e1f2a4dd8d433eec393d09273a78a3d3551339cf"}, {"url": "https://git.kernel.org/stable/c/108dc8741c203e9d6ce4e973367f1bac20c7192b"}], "title": "net: dsa: Avoid cross-chip syncing of VLAN filtering", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/dsa/switch.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e1f2a4dd8d433eec393d09273a78a3d3551339cf", "status": "affected", "version": "d371b7c92d190448f3ccbf082c90bf929285f648", "versionType": "git"}, {"lessThan": "108dc8741c203e9d6ce4e973367f1bac20c7192b", "status": "affected", "version": "d371b7c92d190448f3ccbf082c90bf929285f648", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/dsa/switch.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.2"}, {"lessThan": "5.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.17.*", "status": "unaffected", "version": "5.17.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.18", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "F35FD2B5-23F8-4ADC-8DC5-06183966A3CD", "versionEndExcluding": "5.17.2", "versionStartIncluding": "5.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: Avoid cross-chip syncing of VLAN filtering\n\nChanges to VLAN filtering are not applicable to cross-chip\nnotifications.\n\nOn a system like this:\n\n.-----. .-----. .-----.\n| sw1 +---+ sw2 +---+ sw3 |\n'-1-2-' '-1-2-' '-1-2-'\n\nBefore this change, upon sw1p1 leaving a bridge, a call to\ndsa_port_vlan_filtering would also be made to sw2p1 and sw3p1.\n\nIn this scenario:\n\n.---------. .-----. .-----.\n| sw1 +---+ sw2 +---+ sw3 |\n'-1-2-3-4-' '-1-2-' '-1-2-'\n\nWhen sw1p4 would leave a bridge, dsa_port_vlan_filtering would be\ncalled for sw2 and sw3 with a non-existing port - leading to array\nout-of-bounds accesses and crashes on mv88e6xxx."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: dsa: Evitar la sincronizaci\u00f3n entre chips del filtrado de VLAN Los cambios en el filtrado de VLAN no son aplicables a las notificaciones entre chips. En un sistema como este: .-----. .-----. .-----. | sw1 +---+ sw2 +---+ sw3 | '-1-2-' '-1-2-' '-1-2-' Antes de este cambio, al salir sw1p1 de un puente, tambi\u00e9n se realizaba una llamada a dsa_port_vlan_filtering a sw2p1 y sw3p1. En este escenario: .---------. .-----. .-----. | sw1 +---+ sw2 +---+ sw3 | '-1-2-3-4-' '-1-2-' '-1-2-' Cuando sw1p4 abandonara un puente, se llamar\u00eda a dsa_port_vlan_filtering para sw2 y sw3 con un puerto inexistente, lo que provocar\u00eda accesos fuera de los l\u00edmites de la matriz y fallos en mv88e6xxx."}], "id": "CVE-2022-49234", "lastModified": "2026-08-04T10:17:40.753", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-02-26T07:01:00.407", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/108dc8741c203e9d6ce4e973367f1bac20c7192b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e1f2a4dd8d433eec393d09273a78a3d3551339cf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net: dsa: Avoid cross-chip syncing of VLAN filtering", "id": "2347785", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2347785"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: dsa: Avoid cross-chip syncing of VLAN filtering\nChanges to VLAN filtering are not applicable to cross-chip\nnotifications.\nOn a system like this:\n.-----. .-----. .-----.\n| sw1 +---+ sw2 +---+ sw3 |\n'-1-2-' '-1-2-' '-1-2-'\nBefore this change, upon sw1p1 leaving a bridge, a call to\ndsa_port_vlan_filtering would also be made to sw2p1 and sw3p1.\nIn this scenario:\n.---------. .-----. .-----.\n| sw1 +---+ sw2 +---+ sw3 |\n'-1-2-3-4-' '-1-2-' '-1-2-'\nWhen sw1p4 would leave a bridge, dsa_port_vlan_filtering would be\ncalled for sw2 and sw3 with a non-existing port - leading to array\nout-of-bounds accesses and crashes on mv88e6xxx."], "name": "CVE-2022-49234", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49234\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49234\nhttps://lore.kernel.org/linux-cve-announce/2025022623-CVE-2022-49234-b4b1@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-12T22:45:27.449231+00:00", "updated": "2025-07-12T22:45:27.449318+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}