{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49934", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-05-01T14:05:17.254Z", "datePublished": "2025-06-18T10:54:36.161Z", "dateUpdated": "2026-08-05T08:56:46.037Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:56:46.037Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: Fix UAF in ieee80211_scan_rx()\n\nieee80211_scan_rx() tries to access scan_req->flags after a\nnull check, but a UAF is observed when the scan is completed\nand __ieee80211_scan_completed() executes, which then calls\ncfg80211_scan_done() leading to the freeing of scan_req.\n\nSince scan_req is rcu_dereference()'d, prevent the racing in\n__ieee80211_scan_completed() by ensuring that from mac80211's\nPOV it is no longer accessed from an RCU read critical section\nbefore we call cfg80211_scan_done()." } ], "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 hit in ieee80211_scan_rx() on the softirq RX path when processing over-the-air Probe Response frames during an active scan; an attacker on the same Wi‑Fi RF segment injects those frames.\nAC:L - The attacker controls the RX side by flooding Probe Responses and can retry across frequent automatic scans (observable via the victim’s Probe Requests), making this an attacker-influenced race rather than an uncontrollable condition.\nPR:N - Frame delivery and scan RX handling require no account or capability on the victim; background/connect/scheduled scans run from system WLAN stacks without attacker-held host privileges.\nUI:N - Phones and laptops routinely scan in the background with Wi‑Fi enabled, so Probe Responses are processed at scan completion without further victim action at attack time.\nS:U - The use-after-free corrupts mac80211/cfg80211 heap state inside the host kernel only and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - After kfree(scan_req), ieee80211_scan_rx() still reads scan_req->flags via a dangling RCU reference; reclaiming that cfg80211_scan_request object enables arbitrary kernel disclosure.\nI:H - The same sprayable scan_req UAF in the concurrent RX path yields write and control-flow primitives characteristic of exploitable kernel use-after-frees.\nA:H - Concurrent use of the freed scan_req causes a KASAN-confirmed kernel oops/panic-class crash in the scan RX path, so availability impact is complete even without full 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/scan.c" ], "versions": [ { "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749", "lessThan": "6eb181a64fdabf10be9e54de728876667da20255", "status": "affected", "versionType": "git" }, { "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749", "lessThan": "e0ff39448cea654843744c72c6780293c5082cb1", "status": "affected", "versionType": "git" }, { "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749", "lessThan": "78a07732fbb0934d14827d8f09b9aa6a49ee1aa9", "status": "affected", "versionType": "git" }, { "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749", "lessThan": "9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d", "status": "affected", "versionType": "git" }, { "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749", "lessThan": "4abc8c07a065ecf771827bde3c63fbbe4aa0c08b", "status": "affected", "versionType": "git" }, { "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749", "lessThan": "5d20c6f932f2758078d0454729129c894fe353e7", "status": "affected", "versionType": "git" }, { "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749", "lessThan": "c0445feb80a4d0854898118fa01073701f8d356b", "status": "affected", "versionType": "git" }, { "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749", "lessThan": "60deb9f10eec5c6a20252ed36238b55d8b614a2c", "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/scan.c" ], "versions": [ { "version": "3.19", "status": "affected" }, { "version": "0", "lessThan": "3.19", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.330", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.295", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.260", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.215", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.142", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.66", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.8", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0", "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": "3.19", "versionEndExcluding": "4.9.330" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "4.14.295" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "4.19.260" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.4.215" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.10.142" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.15.66" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.19.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/6eb181a64fdabf10be9e54de728876667da20255" }, { "url": "https://git.kernel.org/stable/c/e0ff39448cea654843744c72c6780293c5082cb1" }, { "url": "https://git.kernel.org/stable/c/78a07732fbb0934d14827d8f09b9aa6a49ee1aa9" }, { "url": "https://git.kernel.org/stable/c/9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d" }, { "url": "https://git.kernel.org/stable/c/4abc8c07a065ecf771827bde3c63fbbe4aa0c08b" }, { "url": "https://git.kernel.org/stable/c/5d20c6f932f2758078d0454729129c894fe353e7" }, { "url": "https://git.kernel.org/stable/c/c0445feb80a4d0854898118fa01073701f8d356b" }, { "url": "https://git.kernel.org/stable/c/60deb9f10eec5c6a20252ed36238b55d8b614a2c" } ], "title": "wifi: mac80211: Fix UAF in ieee80211_scan_rx()", "x_generator": { "engine": "bippy-1.2.0" } } } }