{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49416", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:08:31.568Z", "datePublished": "2025-02-26T02:12:37.173Z", "dateUpdated": "2026-08-05T08:55:08.558Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:55:08.558Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix use-after-free in chanctx code\n\nIn ieee80211_vif_use_reserved_context(), when we have an\nold context and the new context's replace_state is set to\nIEEE80211_CHANCTX_REPLACE_NONE, we free the old context\nin ieee80211_vif_use_reserved_reassign(). Therefore, we\ncannot check the old_ctx anymore, so we should set it to\nNULL after this point.\n\nHowever, since the new_ctx replace state is clearly not\nIEEE80211_CHANCTX_REPLACES_OTHER, we're not going to do\nanything else in this function and can just return to\navoid accessing the freed old_ctx." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The UAF is reached when mac80211 finalizes a channel-context reservation during CSA, which an adjacent attacker triggers by sending CSA beacons/action frames to an associated STA (or via IBSS/mesh CSA). WiFi frame processing is Adjacent, not Network.\nAC:L - The free-then-use is deterministic on the REPLACE_NONE reassign path when the vif was the sole user of old_ctx; the attacker controls CSA initiation and does not depend on an uncontrolled race or rare config.\nPR:N - The STA/mlme path processes CSA from the AP (or spoofed management frames) with no privileges on the victim host. No CAP_NET_ADMIN or local account is required for the over-the-air trigger.\nUI:N - Once the device is associated, CSA handling and chswitch_work run automatically with no further user action required to hit the vulnerable finalize path.\nS:U - This is a mac80211 kernel UAF affecting the local kernel authority only; it does not cross a VM, IOMMU, or other security boundary.\nC:H - Use-after-free of the ieee80211_chanctx object enables heap reuse/control of the freed object and therefore arbitrary read primitives under standard UAF exploitation.\nI:H - The same UAF enables heap spraying and corruption of the reused chanctx object, yielding write/control-flow hijack primitives consistent with kernel memory-corruption impact.\nA:H - Use-after-free of a channel context can cause kernel oops/panic (and is treated as High availability impact even when not fully exploited for code execution)." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/mac80211/chan.c" ], "versions": [ { "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f", "lessThan": "88cc8f963febe192d6ded9df7217f92f380b449a", "status": "affected", "versionType": "git" }, { "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f", "lessThan": "4ba81e794f0fad6234f644c2da1ae14d5b95e1c4", "status": "affected", "versionType": "git" }, { "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f", "lessThan": "9f1e5cc85ad77e52f54049a94db0407445ae2a34", "status": "affected", "versionType": "git" }, { "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f", "lessThan": "265bec4779a38b65e86a25120370f200822dfa76", "status": "affected", "versionType": "git" }, { "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f", "lessThan": "6118bbdf69f4718b02d26bbcf2e497eb66004331", "status": "affected", "versionType": "git" }, { "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f", "lessThan": "b79110f2bf6022e60e590d2e094728a8eec3e79e", "status": "affected", "versionType": "git" }, { "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f", "lessThan": "82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2c", "status": "affected", "versionType": "git" }, { "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f", "lessThan": "4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6c", "status": "affected", "versionType": "git" }, { "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f", "lessThan": "2965c4cdf7ad9ce0796fac5e57debb9519ea721e", "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/mac80211/chan.c" ], "versions": [ { "version": "3.17", "status": "affected" }, { "version": "0", "lessThan": "3.17", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.318", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.283", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.247", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.198", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.121", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.46", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.14", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.3", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19", "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": "3.17", "versionEndExcluding": "4.9.318" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "4.14.283" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "4.19.247" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.4.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.10.121" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.15.46" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.17.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.18.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/88cc8f963febe192d6ded9df7217f92f380b449a" }, { "url": "https://git.kernel.org/stable/c/4ba81e794f0fad6234f644c2da1ae14d5b95e1c4" }, { "url": "https://git.kernel.org/stable/c/9f1e5cc85ad77e52f54049a94db0407445ae2a34" }, { "url": "https://git.kernel.org/stable/c/265bec4779a38b65e86a25120370f200822dfa76" }, { "url": "https://git.kernel.org/stable/c/6118bbdf69f4718b02d26bbcf2e497eb66004331" }, { "url": "https://git.kernel.org/stable/c/b79110f2bf6022e60e590d2e094728a8eec3e79e" }, { "url": "https://git.kernel.org/stable/c/82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2c" }, { "url": "https://git.kernel.org/stable/c/4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6c" }, { "url": "https://git.kernel.org/stable/c/2965c4cdf7ad9ce0796fac5e57debb9519ea721e" } ], "title": "wifi: mac80211: fix use-after-free in chanctx code", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49416", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-27T18:16:18.774528Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-27T18:22:33.196Z" } } ] } }