{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31394","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-03-09T15:48:24.085Z","datePublished":"2026-04-03T15:15:58.806Z","dateUpdated":"2026-05-11T22:07:51.015Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:07:51.015Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmac80211: fix crash in ieee80211_chan_bw_change for AP_VLAN stations\n\nieee80211_chan_bw_change() iterates all stations and accesses\nlink->reserved.oper via sta->sdata->link[link_id]. For stations on\nAP_VLAN interfaces (e.g. 4addr WDS clients), sta->sdata points to\nthe VLAN sdata, whose link never participates in chanctx reservations.\nThis leaves link->reserved.oper zero-initialized with chan == NULL,\ncausing a NULL pointer dereference in __ieee80211_sta_cap_rx_bw()\nwhen accessing chandef->chan->band during CSA.\n\nResolve the VLAN sdata to its parent AP sdata using get_bss_sdata()\nbefore accessing link data.\n\n[also change sta->sdata in ARRAY_SIZE even if it doesn't matter]"}],"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":"b27512368591fc959768df1f7dacf2a96b1bd036","lessThan":"65c25b588994dd422fea73fa322de56e1ae4a33b","status":"affected","versionType":"git"},{"version":"b27512368591fc959768df1f7dacf2a96b1bd036","lessThan":"5a86d4e920d9783a198e39cf53f0e410fba5fbd6","status":"affected","versionType":"git"},{"version":"b27512368591fc959768df1f7dacf2a96b1bd036","lessThan":"3c6629e859a2211a1fbb4868f915413f80001ca5","status":"affected","versionType":"git"},{"version":"b27512368591fc959768df1f7dacf2a96b1bd036","lessThan":"672e5229e1ecfc2a3509b53adcb914d8b024a853","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":"6.11","status":"affected"},{"version":"0","lessThan":"6.11","status":"unaffected","versionType":"semver"},{"version":"6.12.78","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.20","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.10","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","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":"6.11","versionEndExcluding":"6.12.78"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.18.20"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.19.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/65c25b588994dd422fea73fa322de56e1ae4a33b"},{"url":"https://git.kernel.org/stable/c/5a86d4e920d9783a198e39cf53f0e410fba5fbd6"},{"url":"https://git.kernel.org/stable/c/3c6629e859a2211a1fbb4868f915413f80001ca5"},{"url":"https://git.kernel.org/stable/c/672e5229e1ecfc2a3509b53adcb914d8b024a853"}],"title":"mac80211: fix crash in ieee80211_chan_bw_change for AP_VLAN stations","x_generator":{"engine":"bippy-1.2.0"}}}}