{"api_version":"1","generated_at":"2026-10-21T13:33:19+00:00","cve":"CVE-2026-98810","urls":{"html":"https://cve.report/CVE-2026-98810","api":"https://cve.report/api/cve/CVE-2026-98810.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98810","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98810"},"summary":{"title":"wifi: mac80211: fix slab-out-of-bounds read in ieee80211_monitor_select_queue()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix slab-out-of-bounds read in ieee80211_monitor_select_queue()\n\nieee80211_monitor_select_queue() validates the skb length using skb->len\nbefore dereferencing pointers into skb->data to access the 802.11 header.\nHowever, skb->len includes data in both the linear head buffer and\nnon-linear fragments/pages. When AF_PACKET sends a packet large enough to\nbecome non-linear, the 802.11 header at skb->data + len_rthdr may extend\npast the linear head buffer even though skb->len appears sufficient.\n\nThis leads to a slab-out-of-bounds read when accessing hdr->frame_control,\nas the kernel reads beyond the allocated skb head buffer:\n\n  BUG: KASAN: slab-out-of-bounds in ieee80211_monitor_select_queue+0x1ed/0x220\n\nsyzbot has hit the same issues.\n\nFix this by checking skb_headlen(skb) (which gives the length of the\nlinear data region) instead of skb->len before dereferencing skb->data\npointers. This ensures the required bytes are actually present in the\nlinear portion of the skb.\n\nApply the same fix to ieee80211_validate_radiotap_len() which has the\nsame class of bug: it uses skb->len to validate accesses to skb->data,\nand to the corresponding checks in ieee80211_monitor_start_xmit(): for\ndrivers advertising NETIF_F_SG the skb is not linearized before\nndo_start_xmit, so the 802.11 header can be read past the linear\nbuffer there as well.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:35","updated_at":"2026-10-19 10:19:45"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/63e7064b4c1c4b540bf2f0cba47384f92ab95307","name":"https://git.kernel.org/stable/c/63e7064b4c1c4b540bf2f0cba47384f92ab95307","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6f63e919fe1e335b8abcb3a28bfd4804a98d875a","name":"https://git.kernel.org/stable/c/6f63e919fe1e335b8abcb3a28bfd4804a98d875a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98810","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98810","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9b8a74e3482f9fc077a88c13fa0ceca8feb0b772 63e7064b4c1c4b540bf2f0cba47384f92ab95307 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9b8a74e3482f9fc077a88c13fa0ceca8feb0b772 6f63e919fe1e335b8abcb3a28bfd4804a98d875a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.24","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.24 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.10 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/mac80211/iface.c","net/mac80211/tx.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"63e7064b4c1c4b540bf2f0cba47384f92ab95307","status":"affected","version":"9b8a74e3482f9fc077a88c13fa0ceca8feb0b772","versionType":"git"},{"lessThan":"6f63e919fe1e335b8abcb3a28bfd4804a98d875a","status":"affected","version":"9b8a74e3482f9fc077a88c13fa0ceca8feb0b772","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/mac80211/iface.c","net/mac80211/tx.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.24"},{"lessThan":"2.6.24","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.10","versionStartIncluding":"2.6.24","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"2.6.24","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix slab-out-of-bounds read in ieee80211_monitor_select_queue()\n\nieee80211_monitor_select_queue() validates the skb length using skb->len\nbefore dereferencing pointers into skb->data to access the 802.11 header.\nHowever, skb->len includes data in both the linear head buffer and\nnon-linear fragments/pages. When AF_PACKET sends a packet large enough to\nbecome non-linear, the 802.11 header at skb->data + len_rthdr may extend\npast the linear head buffer even though skb->len appears sufficient.\n\nThis leads to a slab-out-of-bounds read when accessing hdr->frame_control,\nas the kernel reads beyond the allocated skb head buffer:\n\n  BUG: KASAN: slab-out-of-bounds in ieee80211_monitor_select_queue+0x1ed/0x220\n\nsyzbot has hit the same issues.\n\nFix this by checking skb_headlen(skb) (which gives the length of the\nlinear data region) instead of skb->len before dereferencing skb->data\npointers. This ensures the required bytes are actually present in the\nlinear portion of the skb.\n\nApply the same fix to ieee80211_validate_radiotap_len() which has the\nsame class of bug: it uses skb->len to validate accesses to skb->data,\nand to the corresponding checks in ieee80211_monitor_start_xmit(): for\ndrivers advertising NETIF_F_SG the skb is not linearized before\nndo_start_xmit, so the 802.11 header can be read past the linear\nbuffer there as well."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:26:03.626Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/63e7064b4c1c4b540bf2f0cba47384f92ab95307"},{"url":"https://git.kernel.org/stable/c/6f63e919fe1e335b8abcb3a28bfd4804a98d875a"}],"title":"wifi: mac80211: fix slab-out-of-bounds read in ieee80211_monitor_select_queue()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98810","datePublished":"2026-10-18T15:48:56.733Z","dateReserved":"2026-09-25T10:25:14.371Z","dateUpdated":"2026-10-19T09:26:03.626Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:35","lastModifiedDate":"2026-10-19 10:19:45","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98810","Ordinal":"1","Title":"wifi: mac80211: fix slab-out-of-bounds read in ieee80211_monitor","CVE":"CVE-2026-98810","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98810","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix slab-out-of-bounds read in ieee80211_monitor_select_queue()\n\nieee80211_monitor_select_queue() validates the skb length using skb->len\nbefore dereferencing pointers into skb->data to access the 802.11 header.\nHowever, skb->len includes data in both the linear head buffer and\nnon-linear fragments/pages. When AF_PACKET sends a packet large enough to\nbecome non-linear, the 802.11 header at skb->data + len_rthdr may extend\npast the linear head buffer even though skb->len appears sufficient.\n\nThis leads to a slab-out-of-bounds read when accessing hdr->frame_control,\nas the kernel reads beyond the allocated skb head buffer:\n\n  BUG: KASAN: slab-out-of-bounds in ieee80211_monitor_select_queue+0x1ed/0x220\n\nsyzbot has hit the same issues.\n\nFix this by checking skb_headlen(skb) (which gives the length of the\nlinear data region) instead of skb->len before dereferencing skb->data\npointers. This ensures the required bytes are actually present in the\nlinear portion of the skb.\n\nApply the same fix to ieee80211_validate_radiotap_len() which has the\nsame class of bug: it uses skb->len to validate accesses to skb->data,\nand to the corresponding checks in ieee80211_monitor_start_xmit(): for\ndrivers advertising NETIF_F_SG the skb is not linearized before\nndo_start_xmit, so the 802.11 header can be read past the linear\nbuffer there as well.","Type":"Description","Title":"wifi: mac80211: fix slab-out-of-bounds read in ieee80211_monitor"}]}}}