{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-31779", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.140Z", "datePublished": "2026-05-01T14:15:06.506Z", "dateUpdated": "2026-08-05T12:25:07.828Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:25:07.828Z" }, "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." } ], "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireless/intel/iwlwifi/mvm/d3.c" ], "versions": [ { "version": "5ac54afd4d97ad8d94fe250c83b1924eb6d2268c", "lessThan": "f6abac936a0dfd31d6c3e49205ec0ee75a8f887f", "status": "affected", "versionType": "git" }, { "version": "5ac54afd4d97ad8d94fe250c83b1924eb6d2268c", "lessThan": "ffbed27ba15ef80d1c622eeedbfef03e501ae134", "status": "affected", "versionType": "git" }, { "version": "5ac54afd4d97ad8d94fe250c83b1924eb6d2268c", "lessThan": "e67d8c626ace80b0fa2b48c8ec0a46b508c93442", "status": "affected", "versionType": "git" }, { "version": "5ac54afd4d97ad8d94fe250c83b1924eb6d2268c", "lessThan": "dd90880eb5ec5442b37eb2b95688f4a63f4883e3", "status": "affected", "versionType": "git" }, { "version": "5ac54afd4d97ad8d94fe250c83b1924eb6d2268c", "lessThan": "ca0e9491b98ca4c5b44204b0b3dd8062a3b5fba2", "status": "affected", "versionType": "git" }, { "version": "5ac54afd4d97ad8d94fe250c83b1924eb6d2268c", "lessThan": "744fabc338e87b95c4d1ff7c95bc8c0f834c6d99", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireless/intel/iwlwifi/mvm/d3.c" ], "versions": [ { "version": "6.1", "status": "affected" }, { "version": "0", "lessThan": "6.1", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.168", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.81", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.12", "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": "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" } ] } ] } ], "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" } ], "title": "wifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler()", "x_generator": { "engine": "bippy-1.2.0" } } } }