{"id":"CVE-2026-98810","revision":"0a7e96542588400c9f68489f38917e01","records":[{"revision":"0a7e96542588400c9f68489f38917e01","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98810","aliases":[],"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":0,"publishedAt":"2026-10-18T15:48:56.733+00:00","modifiedAt":"2026-10-19T09:26:03.626+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/mac80211/iface.c\",\n                        \"net/mac80211/tx.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"9b8a74e3482f9fc077a88c13fa0ceca8feb0b772\",\n                            \"lessThan\": \"63e7064b4c1c4b540bf2f0cba47384f92ab95307\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9b8a74e3482f9fc077a88c13fa0ceca8feb0b772\",\n                            \"lessThan\": \"6f63e919fe1e335b8abcb3a28bfd4804a98d875a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/mac80211/iface.c\",\n                        \"net/mac80211/tx.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.24\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.24\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.10\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/63e7064b4c1c4b540bf2f0cba47384f92ab95307","https://git.kernel.org/stable/c/6f63e919fe1e335b8abcb3a28bfd4804a98d875a"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98810","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98810","identifiers":["CVE-2026-98810"]},"retained":false,"historicalAffected":[]}],"coverage":[]}