{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-40929","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-07-12T12:17:45.583Z","datePublished":"2024-07-12T12:25:08.434Z","dateUpdated":"2026-08-05T11:34:05.245Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:34:05.245Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: mvm: check n_ssids before accessing the ssids\n\nIn some versions of cfg80211, the ssids poinet might be a valid one even\nthough n_ssids is 0. Accessing the pointer in this case will cuase an\nout-of-bound access. Fix this by checking n_ssids first."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:A - The vulnerable branch is only reached through cfg80211's split 6 GHz scan, whose request layout and channel count are built from co-located-AP (RNR) information carried in beacons/probe responses received over the air, so an attacker within WiFi radio range shapes the allocation that is read out of bounds. Per WiFi-frame guidance this is Adjacent rather than Local.\nAC:L - The attacker can beacon crafted RNR elements continuously and vary the advertised co-located-AP count to sweep allocation layouts, while 6 GHz-capable iwlwifi clients perform passive scans routinely, so the condition can be retried until it hits.\nPR:N - An adjacent attacker needs no account or credentials on the target; the passive 6 GHz scan that walks the buggy code is initiated automatically by the system's normal background scanning rather than by any attacker-held privilege.\nUI:N - Periodic passive scanning by NetworkManager/wpa_supplicant drives the vulnerable path with no action from the logged-in user.\nS:U - The out-of-bounds read stays inside the kernel's own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:L - The read is a single byte at a fixed offset 32 past the ssids pointer and is never copied to userspace or the air; it only selects between two hard-coded dwell budgets (100 vs 300 TU), which yields at most a timing-observable one-bit oracle on adjacent kernel heap memory.\nI:N - Nothing is written out of bounds — the only side effect is that one of two legitimate constant values is placed in the firmware scan command's adwell_max_budget field.\nA:H - The access reads up to 33 bytes past the end of a kzalloc'd scan request; on KASAN or hardened kernels this is a slab-out-of-bounds report that panics under panic_on_warn/kasan.fault=panic, and a page-order allocation ending on a page boundary can fault and oops."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/intel/iwlwifi/mvm/scan.c"],"versions":[{"version":"c1a7515393e403758a684fd0a2372af466675b15","lessThan":"3c4771091ea8016c8601399078916f722dd8833b","status":"affected","versionType":"git"},{"version":"c1a7515393e403758a684fd0a2372af466675b15","lessThan":"f777792952d03bbaf8329fdfa99393a5a33e2640","status":"affected","versionType":"git"},{"version":"c1a7515393e403758a684fd0a2372af466675b15","lessThan":"9e719ae3abad60e245ce248ba3f08148f375a614","status":"affected","versionType":"git"},{"version":"c1a7515393e403758a684fd0a2372af466675b15","lessThan":"29a18d56bd64b95bd10bda4afda512558471382a","status":"affected","versionType":"git"},{"version":"c1a7515393e403758a684fd0a2372af466675b15","lessThan":"62e007bdeb91c6879a4652c3426aef1cd9d2937b","status":"affected","versionType":"git"},{"version":"c1a7515393e403758a684fd0a2372af466675b15","lessThan":"60d62757df30b74bf397a2847a6db7385c6ee281","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/wireless/intel/iwlwifi/mvm/scan.c"],"versions":[{"version":"4.17","status":"affected"},{"version":"0","lessThan":"4.17","status":"unaffected","versionType":"semver"},{"version":"5.10.221","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.162","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.95","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.35","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.9.6","lessThanOrEqual":"6.9.*","status":"unaffected","versionType":"semver"},{"version":"6.10","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":"4.17","versionEndExcluding":"5.10.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.15.162"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.1.95"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.6.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.9.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.10"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3c4771091ea8016c8601399078916f722dd8833b"},{"url":"https://git.kernel.org/stable/c/f777792952d03bbaf8329fdfa99393a5a33e2640"},{"url":"https://git.kernel.org/stable/c/9e719ae3abad60e245ce248ba3f08148f375a614"},{"url":"https://git.kernel.org/stable/c/29a18d56bd64b95bd10bda4afda512558471382a"},{"url":"https://git.kernel.org/stable/c/62e007bdeb91c6879a4652c3426aef1cd9d2937b"},{"url":"https://git.kernel.org/stable/c/60d62757df30b74bf397a2847a6db7385c6ee281"}],"title":"wifi: iwlwifi: mvm: check n_ssids before accessing the ssids","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/3c4771091ea8016c8601399078916f722dd8833b","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/f777792952d03bbaf8329fdfa99393a5a33e2640","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/9e719ae3abad60e245ce248ba3f08148f375a614","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/29a18d56bd64b95bd10bda4afda512558471382a","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/62e007bdeb91c6879a4652c3426aef1cd9d2937b","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/60d62757df30b74bf397a2847a6db7385c6ee281","tags":["x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T21:57:56.614Z"}},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-40929","role":"CISA 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