{"id":"CVE-2026-31779","state":"PUBLISHED","title":"wifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler()\n\nThe memcpy function assumes the dynamic array notif->matches is at least\nas large as the number of bytes to copy. Otherwise, results->matches may\ncontain unwanted data. To guarantee safety, extend the validation in one\nof the checks to ensure sufficient packet length.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE.","publishedAt":"2026-05-01T14:15:06.506Z","updatedAt":"2026-10-19T19:06:08.628Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5ac54afd4d97ad8d94fe250c83b1924eb6d2268c","status":"affected","lessThan":"f6abac936a0dfd31d6c3e49205ec0ee75a8f887f","versionType":"git"},{"version":"5ac54afd4d97ad8d94fe250c83b1924eb6d2268c","status":"affected","lessThan":"ffbed27ba15ef80d1c622eeedbfef03e501ae134","versionType":"git"},{"version":"5ac54afd4d97ad8d94fe250c83b1924eb6d2268c","status":"affected","lessThan":"e67d8c626ace80b0fa2b48c8ec0a46b508c93442","versionType":"git"},{"version":"5ac54afd4d97ad8d94fe250c83b1924eb6d2268c","status":"affected","lessThan":"dd90880eb5ec5442b37eb2b95688f4a63f4883e3","versionType":"git"},{"version":"5ac54afd4d97ad8d94fe250c83b1924eb6d2268c","status":"affected","lessThan":"ca0e9491b98ca4c5b44204b0b3dd8062a3b5fba2","versionType":"git"},{"version":"5ac54afd4d97ad8d94fe250c83b1924eb6d2268c","status":"affected","lessThan":"744fabc338e87b95c4d1ff7c95bc8c0f834c6d99","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/intel/iwlwifi/mvm/d3.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.1","versionType":"semver"},{"version":"6.1.168","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.134","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.81","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.22","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.12","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/intel/iwlwifi/mvm/d3.c"]}],"references":["https://git.kernel.org/stable/c/f6abac936a0dfd31d6c3e49205ec0ee75a8f887f","https://git.kernel.org/stable/c/ffbed27ba15ef80d1c622eeedbfef03e501ae134","https://git.kernel.org/stable/c/e67d8c626ace80b0fa2b48c8ec0a46b508c93442","https://git.kernel.org/stable/c/dd90880eb5ec5442b37eb2b95688f4a63f4883e3","https://git.kernel.org/stable/c/ca0e9491b98ca4c5b44204b0b3dd8062a3b5fba2","https://git.kernel.org/stable/c/744fabc338e87b95c4d1ff7c95bc8c0f834c6d99"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31779.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31779","state":"PUBLISHED","datePublished":"2026-05-01T14:15:06.506Z","dateUpdated":"2026-10-19T19:06:08.628Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.140Z"},"containers":{"cna":{"title":"wifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler()\n\nThe memcpy function assumes the dynamic array notif->matches is at least\nas large as the number of bytes to copy. Otherwise, results->matches may\ncontain unwanted data. To guarantee safety, extend the validation in one\nof the checks to ensure sufficient packet length.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5ac54afd4d97ad8d94fe250c83b1924eb6d2268c","status":"affected","lessThan":"f6abac936a0dfd31d6c3e49205ec0ee75a8f887f","versionType":"git"},{"version":"5ac54afd4d97ad8d94fe250c83b1924eb6d2268c","status":"affected","lessThan":"ffbed27ba15ef80d1c622eeedbfef03e501ae134","versionType":"git"},{"version":"5ac54afd4d97ad8d94fe250c83b1924eb6d2268c","status":"affected","lessThan":"e67d8c626ace80b0fa2b48c8ec0a46b508c93442","versionType":"git"},{"version":"5ac54afd4d97ad8d94fe250c83b1924eb6d2268c","status":"affected","lessThan":"dd90880eb5ec5442b37eb2b95688f4a63f4883e3","versionType":"git"},{"version":"5ac54afd4d97ad8d94fe250c83b1924eb6d2268c","status":"affected","lessThan":"ca0e9491b98ca4c5b44204b0b3dd8062a3b5fba2","versionType":"git"},{"version":"5ac54afd4d97ad8d94fe250c83b1924eb6d2268c","status":"affected","lessThan":"744fabc338e87b95c4d1ff7c95bc8c0f834c6d99","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/intel/iwlwifi/mvm/d3.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.1","versionType":"semver"},{"version":"6.1.168","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.134","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.81","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.22","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.12","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/intel/iwlwifi/mvm/d3.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/f6abac936a0dfd31d6c3e49205ec0ee75a8f887f"},{"url":"https://git.kernel.org/stable/c/ffbed27ba15ef80d1c622eeedbfef03e501ae134"},{"url":"https://git.kernel.org/stable/c/e67d8c626ace80b0fa2b48c8ec0a46b508c93442"},{"url":"https://git.kernel.org/stable/c/dd90880eb5ec5442b37eb2b95688f4a63f4883e3"},{"url":"https://git.kernel.org/stable/c/ca0e9491b98ca4c5b44204b0b3dd8062a3b5fba2"},{"url":"https://git.kernel.org/stable/c/744fabc338e87b95c4d1ff7c95bc8c0f834c6d99"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","baseScore":8.1,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:A - The vulnerable path is in the WiFi WoWLAN/net-detect resume flow, where adjacent wireless activity can cause firmware scan-match notifications. It is not Internet-routable and requires WiFi radio proximity.\nAC:L - Once WoWLAN net-detect is active, causing matching scan results is straightforward for an adjacent attacker with a spoofed AP/beacon. There is no race or timing requirement in the kernel handler itself.\nPR:N - An adjacent wireless attacker does not need local credentials on the target to transmit frames that cause net-detect wake processing. Any local privilege needed to configure WoWLAN is a deployment prerequisite, not attacker privilege in the highest reasonable scenario.\nUI:N - WoWLAN/net-detect processing occurs autonomously while the system is suspended and during resume. The attacker does not need a victim to open a file or perform an application-level action.\nS:U - The bug affects the Linux kernel driver handling its own device/firmware notification data. It does not cross into another security authority such as a VM host boundary.\nC:H - The flaw is an out-of-bounds read from the firmware notification buffer into saved net-detect results and is not limited to only a few bytes. Under the required high-severity rule, this supports high confidentiality impact.\nI:N - The vulnerable operation is a read and bounded copy into an appropriately sized destination buffer. I found no out-of-bounds write or direct primitive for modifying kernel data.\nA:H - The copied unintended bytes are later interpreted as match/channel metadata and can drive invalid kernel accesses while reporting net-detect results. A malformed notification can therefore plausibly cause an oops or kernel crash."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:25:07.828Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.6.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.12.81"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.18.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.19.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-31779","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-16T15:13:14.151530Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","type":"CWE","description":"CWE-125 Out-of-bounds Read"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T19:06:08.628Z"}}]}}}