{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-48779", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-06-20T11:09:39.062Z", "datePublished": "2024-07-16T11:13:17.173Z", "dateUpdated": "2026-08-05T08:52:13.141Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:52:13.141Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mscc: ocelot: fix use-after-free in ocelot_vlan_del()\n\nocelot_vlan_member_del() will free the struct ocelot_bridge_vlan, so if\nthis is the same as the port's pvid_vlan which we access afterwards,\nwhat we're accessing is freed memory.\n\nFix the bug by determining whether to clear ocelot_port->pvid_vlan prior\nto calling ocelot_vlan_member_del()." } ], "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 - The UAF is reached only through local VLAN configuration (bridge switchdev PORT_VLAN delete or ndo_vlan_rx_kill_vid → ocelot_vlan_del/felix_vlan_del), not by processing remote or adjacent-link packets.\nAC:L - An attacker who can add then delete a PVID VLAN as the last member deterministically frees struct ocelot_bridge_vlan and then dereferences ocelot_port->pvid_vlan; no attacker-uncontrollable race or external condition is required.\nPR:L - VLAN delete is gated by CAP_NET_ADMIN via netlink_ns_capable in the device’s user_ns; Felix/ocelot ports are not NETIF_F_NETNS_LOCAL, so a delegated port in a user-namespace-owned netns yields NET_ADMIN without init-namespace root (same model as CVE-2022-49141/CVE-2026-22982).\nUI:N - The attacker performs the bridge/8021q VLAN delete themselves; no separate victim action is required.\nS:U - This is a standard in-kernel heap use-after-free within the host OS authority and does not cross a VM, IOMMU, or other security boundary.\nC:H - ocelot_vlan_member_del() frees the ocelot_bridge_vlan while pvid_vlan still points at it, so the subsequent vid read (and later ocelot_port_set_pvid uses of a dangling pointer) is a classic UAF enabling arbitrary kernel read via heap reuse.\nI:H - The dangling pvid_vlan pointer can persist when freed memory is reused with a non-matching vid, and later reads of attacker-controlled object contents influence kernel/hardware VLAN state, yielding standard UAF write/control-flow primitives under heap spraying.\nA:H - Use-after-free of the VLAN object can oops/panic the kernel even without a full exploit, so availability impact is High per UAF guidance." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/mscc/ocelot.c" ], "versions": [ { "version": "d4004422f6f9fa8e55c04482008c1c9f9edd2d19", "lessThan": "c98bed60cdd7f22237ae256cc9c1c3087206b8a2", "status": "affected", "versionType": "git" }, { "version": "d4004422f6f9fa8e55c04482008c1c9f9edd2d19", "lessThan": "ef57640575406f57f5b3393cf57f457b0ace837e", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/mscc/ocelot.c" ], "versions": [ { "version": "5.16", "status": "affected" }, { "version": "0", "lessThan": "5.16", "status": "unaffected", "versionType": "semver" }, { "version": "5.16.11", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17", "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": "5.16", "versionEndExcluding": "5.16.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "5.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c98bed60cdd7f22237ae256cc9c1c3087206b8a2" }, { "url": "https://git.kernel.org/stable/c/ef57640575406f57f5b3393cf57f457b0ace837e" } ], "title": "net: mscc: ocelot: fix use-after-free in ocelot_vlan_del()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:25:01.867Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/c98bed60cdd7f22237ae256cc9c1c3087206b8a2", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/ef57640575406f57f5b3393cf57f457b0ace837e", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2022-48779", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T17:00:24.152483Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:17.252Z" } } ] } }