{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-23396", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23396", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-03-26T10:22:49.287Z", "updatedAt": "2026-10-15T01:14:46.530Z", "importedAt": "2026-10-24T01:58:02.025Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "wifi: mac80211: fix NULL deref in mesh_matches_local()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix NULL deref in mesh_matches_local()\n\nmesh_matches_local() unconditionally dereferences ie->mesh_config to\ncompare mesh configuration parameters. When called from\nmesh_rx_csa_frame(), the parsed action-frame elements may not contain a\nMesh Configuration IE, leaving ie->mesh_config NULL and triggering a\nkernel NULL pointer dereference.\n\nThe other two callers are already safe:\n - ieee80211_mesh_rx_bcn_presp() checks !elems->mesh_config before\n calling mesh_matches_local()\n - mesh_plink_get_event() is only reached through\n mesh_process_plink_frame(), which checks !elems->mesh_config, too\n\nmesh_rx_csa_frame() is the only caller that passes raw parsed elements\nto mesh_matches_local() without guarding mesh_config. An adjacent\nattacker can exploit this by sending a crafted CSA action frame that\nincludes a valid Mesh ID IE but omits the Mesh Configuration IE,\ncrashing the kernel.\n\nThe captured crash log:\n\nOops: general protection fault, probably for non-canonical address ...\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nWorkqueue: events_unbound cfg80211_wiphy_work\n[...]\nCall Trace:\n \n ? __pfx_mesh_matches_local (net/mac80211/mesh.c:65)\n ieee80211_mesh_rx_queued_mgmt (net/mac80211/mesh.c:1686)\n [...]\n ieee80211_iface_work (net/mac80211/iface.c:1754 net/mac80211/iface.c:1802)\n [...]\n cfg80211_wiphy_work (net/wireless/core.c:426)\n process_one_work (net/kernel/workqueue.c:3280)\n ? assign_work (net/kernel/workqueue.c:1219)\n worker_thread (net/kernel/workqueue.c:3352)\n ? __pfx_worker_thread (net/kernel/workqueue.c:3385)\n kthread (net/kernel/kthread.c:436)\n [...]\n ret_from_fork_asm (net/arch/x86/entry/entry_64.S:255)\n \n\nThis patch adds a NULL check for ie->mesh_config at the top of\nmesh_matches_local() to return false early when the Mesh Configuration\nIE is absent.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790", "status": "affected", "versionType": "git", "lessThan": "14a4fd13657a3f2489db6566f081adfb27a49c64" }, { "version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790", "status": "affected", "versionType": "git", "lessThan": "74de6fa472b03bc8cde0a081484e9960bcbda568" }, { "version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790", "status": "affected", "versionType": "git", "lessThan": "c1e3f2416fb27c816ce96d747d3e784e31f4d95c" }, { "version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790", "status": "affected", "versionType": "git", "lessThan": "0a4da176ae4b4e075a19c00d3e269cfd5e05a813" }, { "version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790", "status": "affected", "versionType": "git", "lessThan": "a90279e7f7ea0b7e923a1c5ebee9a6b78b6d1004" }, { "version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790", "status": "affected", "versionType": "git", "lessThan": "44699c6cdfce80a0f296b54ae9314461e3e41b3d" }, { "version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790", "status": "affected", "versionType": "git", "lessThan": "7c55a3deaf7eaaafa2546f8de7fed19382a0a116" }, { "version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790", "status": "affected", "versionType": "git", "lessThan": "c73bb9a2d33bf81f6eecaa0f474b6c6dbe9855bd" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.26", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.26" }, { "version": "5.10.253", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.203", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.167", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.130", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.78", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.20", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "6.19.10", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.19.*" }, { "version": "7.0", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }