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vuln-cve/data/2026/23xxx/CVE-2026-23396.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-23396",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-01-13T15:37:46.011Z",
"datePublished": "2026-03-26T10:22:49.287Z",
"dateUpdated": "2026-10-15T01:14:46.530Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-05-11T22:06:05.924Z"
},
"descriptions": [
{
"lang": "en",
"value": "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 <TASK>\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 </TASK>\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": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/mac80211/mesh.c"
],
"versions": [
{
"version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790",
"lessThan": "14a4fd13657a3f2489db6566f081adfb27a49c64",
"status": "affected",
"versionType": "git"
},
{
"version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790",
"lessThan": "74de6fa472b03bc8cde0a081484e9960bcbda568",
"status": "affected",
"versionType": "git"
},
{
"version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790",
"lessThan": "c1e3f2416fb27c816ce96d747d3e784e31f4d95c",
"status": "affected",
"versionType": "git"
},
{
"version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790",
"lessThan": "0a4da176ae4b4e075a19c00d3e269cfd5e05a813",
"status": "affected",
"versionType": "git"
},
{
"version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790",
"lessThan": "a90279e7f7ea0b7e923a1c5ebee9a6b78b6d1004",
"status": "affected",
"versionType": "git"
},
{
"version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790",
"lessThan": "44699c6cdfce80a0f296b54ae9314461e3e41b3d",
"status": "affected",
"versionType": "git"
},
{
"version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790",
"lessThan": "7c55a3deaf7eaaafa2546f8de7fed19382a0a116",
"status": "affected",
"versionType": "git"
},
{
"version": "2e3c8736820bf72a8ad10721c7e31d36d4fa7790",
"lessThan": "c73bb9a2d33bf81f6eecaa0f474b6c6dbe9855bd",
"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/mesh.c"
],
"versions": [
{
"version": "2.6.26",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.26",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.253",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.203",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.167",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.130",
"lessThanOrEqual": "6.6.*",
"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": "2.6.26",
"versionEndExcluding": "5.10.253"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.26",
"versionEndExcluding": "5.15.203"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.26",
"versionEndExcluding": "6.1.167"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.26",
"versionEndExcluding": "6.6.130"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.26",
"versionEndExcluding": "6.12.78"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.26",
"versionEndExcluding": "6.18.20"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.26",
"versionEndExcluding": "6.19.10"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.26",
"versionEndExcluding": "7.0"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/14a4fd13657a3f2489db6566f081adfb27a49c64"
},
{
"url": "https://git.kernel.org/stable/c/74de6fa472b03bc8cde0a081484e9960bcbda568"
},
{
"url": "https://git.kernel.org/stable/c/c1e3f2416fb27c816ce96d747d3e784e31f4d95c"
},
{
"url": "https://git.kernel.org/stable/c/0a4da176ae4b4e075a19c00d3e269cfd5e05a813"
},
{
"url": "https://git.kernel.org/stable/c/a90279e7f7ea0b7e923a1c5ebee9a6b78b6d1004"
},
{
"url": "https://git.kernel.org/stable/c/44699c6cdfce80a0f296b54ae9314461e3e41b3d"
},
{
"url": "https://git.kernel.org/stable/c/7c55a3deaf7eaaafa2546f8de7fed19382a0a116"
},
{
"url": "https://git.kernel.org/stable/c/c73bb9a2d33bf81f6eecaa0f474b6c6dbe9855bd"
}
],
"title": "wifi: mac80211: fix NULL deref in mesh_matches_local()",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"x_adpType": "supplier",
"providerMetadata": {
"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"shortName": "siemens-SADP",
"dateUpdated": "2026-10-15T01:14:46.530Z"
},
"affected": [
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "*",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
}
],
"references": [
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
}
]
}
]
}
}
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