{"id":"CVE-2026-53182","state":"PUBLISHED","title":"wifi: nl80211: reject oversized EMA RNR lists","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: nl80211: reject oversized EMA RNR lists\n\nnl80211_parse_rnr_elems() stores the parsed element count in a\nu8-backed cfg80211_rnr_elems::cnt field and uses that count to size\nthe flexible array allocation.\n\nReject nested NL80211_ATTR_EMA_RNR_ELEMS input once the count reaches\n255, before incrementing it again. This keeps the parser aligned with\nthe data structure it fills and matches the existing bound check used\nby nl80211_parse_mbssid_elems().","publishedAt":"2026-06-25T08:38:56.654Z","updatedAt":"2026-10-19T19:57:26.414Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"56189d7bc30531def6b999f27940ee43c6ff2569","status":"affected","lessThan":"fc0ec2fc02dfe52c5821f36fbccf6a45df43f508","versionType":"git"},{"version":"dbbb27e183b1568d5a907ace1cd144b0709ea52a","status":"affected","lessThan":"688fcac7054abc680c0eef753f2bb772cfaf8cf7","versionType":"git"},{"version":"dbbb27e183b1568d5a907ace1cd144b0709ea52a","status":"affected","lessThan":"30c3fa80f423613efdda3deca4af52ff7d20e4e2","versionType":"git"},{"version":"dbbb27e183b1568d5a907ace1cd144b0709ea52a","status":"affected","lessThan":"265c07c09c837621730d35f02975207a1224bf05","versionType":"git"},{"version":"dbbb27e183b1568d5a907ace1cd144b0709ea52a","status":"affected","lessThan":"ecbf3c45add30a0857414e156bdb9c79906f0ff6","versionType":"git"},{"version":"dbbb27e183b1568d5a907ace1cd144b0709ea52a","status":"affected","lessThan":"4cd92957e8f8cc4ebfe8a5d4203c14c592fde6b1","versionType":"git"},{"version":"6.1.160","status":"affected","lessThan":"6.1.176","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/wireless/nl80211.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.94","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.36","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.13","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/wireless/nl80211.c"]}],"references":["https://git.kernel.org/stable/c/fc0ec2fc02dfe52c5821f36fbccf6a45df43f508","https://git.kernel.org/stable/c/688fcac7054abc680c0eef753f2bb772cfaf8cf7","https://git.kernel.org/stable/c/30c3fa80f423613efdda3deca4af52ff7d20e4e2","https://git.kernel.org/stable/c/265c07c09c837621730d35f02975207a1224bf05","https://git.kernel.org/stable/c/ecbf3c45add30a0857414e156bdb9c79906f0ff6","https://git.kernel.org/stable/c/4cd92957e8f8cc4ebfe8a5d4203c14c592fde6b1"],"weaknesses":["CWE-190"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53182.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53182","state":"PUBLISHED","datePublished":"2026-06-25T08:38:56.654Z","dateUpdated":"2026-10-19T19:57:26.414Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.390Z"},"containers":{"cna":{"title":"wifi: nl80211: reject oversized EMA RNR lists","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: nl80211: reject oversized EMA RNR lists\n\nnl80211_parse_rnr_elems() stores the parsed element count in a\nu8-backed cfg80211_rnr_elems::cnt field and uses that count to size\nthe flexible array allocation.\n\nReject nested NL80211_ATTR_EMA_RNR_ELEMS input once the count reaches\n255, before incrementing it again. This keeps the parser aligned with\nthe data structure it fills and matches the existing bound check used\nby nl80211_parse_mbssid_elems()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"56189d7bc30531def6b999f27940ee43c6ff2569","status":"affected","lessThan":"fc0ec2fc02dfe52c5821f36fbccf6a45df43f508","versionType":"git"},{"version":"dbbb27e183b1568d5a907ace1cd144b0709ea52a","status":"affected","lessThan":"688fcac7054abc680c0eef753f2bb772cfaf8cf7","versionType":"git"},{"version":"dbbb27e183b1568d5a907ace1cd144b0709ea52a","status":"affected","lessThan":"30c3fa80f423613efdda3deca4af52ff7d20e4e2","versionType":"git"},{"version":"dbbb27e183b1568d5a907ace1cd144b0709ea52a","status":"affected","lessThan":"265c07c09c837621730d35f02975207a1224bf05","versionType":"git"},{"version":"dbbb27e183b1568d5a907ace1cd144b0709ea52a","status":"affected","lessThan":"ecbf3c45add30a0857414e156bdb9c79906f0ff6","versionType":"git"},{"version":"dbbb27e183b1568d5a907ace1cd144b0709ea52a","status":"affected","lessThan":"4cd92957e8f8cc4ebfe8a5d4203c14c592fde6b1","versionType":"git"},{"version":"6.1.160","status":"affected","lessThan":"6.1.176","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/wireless/nl80211.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.94","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.36","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.13","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/wireless/nl80211.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/fc0ec2fc02dfe52c5821f36fbccf6a45df43f508"},{"url":"https://git.kernel.org/stable/c/688fcac7054abc680c0eef753f2bb772cfaf8cf7"},{"url":"https://git.kernel.org/stable/c/30c3fa80f423613efdda3deca4af52ff7d20e4e2"},{"url":"https://git.kernel.org/stable/c/265c07c09c837621730d35f02975207a1224bf05"},{"url":"https://git.kernel.org/stable/c/ecbf3c45add30a0857414e156bdb9c79906f0ff6"},{"url":"https://git.kernel.org/stable/c/4cd92957e8f8cc4ebfe8a5d4203c14c592fde6b1"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The vulnerable parser is reached through local nl80211 generic-netlink commands that configure AP beacon data, not by received WiFi frames or remote network traffic.\nAC:L - An attacker who can send the command can deterministically provide 256 or more nested EMA RNR elements; there is no race or condition outside the attacker's control beyond targeting an affected AP-capable configuration.\nPR:L - The commands require CAP_NET_ADMIN via GENL_UNS_ADMIN_PERM, which is checked in the relevant network namespace; under kernel scoring guidance this is low privilege because CAP_NET_ADMIN may be available through user namespaces.\nUI:N - No victim action is required after the attacker sends the crafted nl80211 request.\nS:U - The corruption occurs inside the kernel and impacts the same kernel security authority; it is not a VM escape or other cross-scope boundary violation.\nC:H - The u8 count wrap causes an undersized flexible-array allocation followed by attacker-influenced out-of-bounds heap writes, which is memory corruption plausibly usable for kernel memory disclosure.\nI:H - The bug is a kernel heap out-of-bounds write of RNR element metadata past the allocation, making arbitrary corruption or control-flow compromise defensible.\nA:H - The same heap corruption can readily crash or panic the kernel even if not weaponized for code execution."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:33:48.954Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.160","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.12.94"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.18.36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.0.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-53182","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:26:12.576651Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","lang":"en","type":"CWE","description":"CWE-190 Integer Overflow or Wraparound"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T19:57:26.414Z"}}]}}}