{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-40941", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-12T12:17:45.587Z", "datePublished": "2024-07-12T12:25:16.471Z", "dateUpdated": "2026-08-05T11:34:08.475Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:34:08.475Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: mvm: don't read past the mfuart notifcation\n\nIn case the firmware sends a notification that claims it has more data\nthan it has, we will read past that was allocated for the notification.\nRemove the print of the buffer, we won't see it by default. If needed,\nwe can see the content with tracing.\n\nThis was reported by KFENCE." } ], "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 malicious length field arrives in a firmware notification from the Intel WiFi NIC, reachable by an RF-adjacent attacker who compromises the NIC firmware over the air or drives the MFUART into an assert; it is not routable from an arbitrary remote network.\nAC:L - The handler is a synchronous RX handler with no bounds check on data_size, and the OOB read is evaluated as a function argument to the out-of-line __iwl_dbg(), which is compiled in whenever CONFIG_IWLWIFI_DEVICE_TRACING (default y) or CONFIG_IWLWIFI_DEBUG is set, so a single crafted notification triggers it reliably.\nPR:N - No host credentials of any kind are required; the notification is processed unconditionally on the RX path as soon as the device sends it, with no capability or authentication gate.\nUI:N - The notification is consumed automatically by the driver's RX path on an associated or even merely operational interface; no victim action is needed.\nS:U - The out-of-bounds read and its consequences are confined to the kernel's own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - n_words is attacker-influenced up to ~2^30, so arbitrary kernel memory far past the RX buffer is read and each dword is formatted into the kernel log/trace ring when IWL_DL_INFO or ftrace is enabled, yielding large-scale kernel memory disclosure.\nI:N - The vulnerable loop performs only reads of dump_data[i]; no out-of-bounds write or other modification of kernel state occurs.\nA:H - Walking up to ~4 GB past a 4K–16K RX buffer inevitably reaches unmapped memory, producing an oops/panic (KFENCE flagged the access), so the bug is a reliable remote-triggerable 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/fw.c" ], "versions": [ { "version": "bdccdb854f2fb473f2ac4a6108df3cbfcedd5a87", "lessThan": "15b37c6fab9d5e40ac399fa1c725118588ed649c", "status": "affected", "versionType": "git" }, { "version": "bdccdb854f2fb473f2ac4a6108df3cbfcedd5a87", "lessThan": "6532f18e66b384b8d4b7e5c9caca042faaa9e8de", "status": "affected", "versionType": "git" }, { "version": "bdccdb854f2fb473f2ac4a6108df3cbfcedd5a87", "lessThan": "46c59a25337049a2a230ce7f7c3b9f21d0aaaad7", "status": "affected", "versionType": "git" }, { "version": "bdccdb854f2fb473f2ac4a6108df3cbfcedd5a87", "lessThan": "65686118845d427df27ee83a6ddd4885596b0805", "status": "affected", "versionType": "git" }, { "version": "bdccdb854f2fb473f2ac4a6108df3cbfcedd5a87", "lessThan": "a8bc8276af9aeacabb773f0c267cfcdb847c6f2d", "status": "affected", "versionType": "git" }, { "version": "bdccdb854f2fb473f2ac4a6108df3cbfcedd5a87", "lessThan": "a05018739a5e6b9dc112c95bd4c59904062c8940", "status": "affected", "versionType": "git" }, { "version": "bdccdb854f2fb473f2ac4a6108df3cbfcedd5a87", "lessThan": "acdfa33c3cf5e1cd185cc1e0486bd0ea9f09c154", "status": "affected", "versionType": "git" }, { "version": "bdccdb854f2fb473f2ac4a6108df3cbfcedd5a87", "lessThan": "4bb95f4535489ed830cf9b34b0a891e384d1aee4", "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/fw.c" ], "versions": [ { "version": "4.12", "status": "affected" }, { "version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.317", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.279", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.221", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.162", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.95", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.35", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.6", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10", "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": "4.12", "versionEndExcluding": "4.19.317" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.4.279" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.10.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.15.162" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.1.95" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.6.35" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.9.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/15b37c6fab9d5e40ac399fa1c725118588ed649c" }, { "url": "https://git.kernel.org/stable/c/6532f18e66b384b8d4b7e5c9caca042faaa9e8de" }, { "url": "https://git.kernel.org/stable/c/46c59a25337049a2a230ce7f7c3b9f21d0aaaad7" }, { "url": "https://git.kernel.org/stable/c/65686118845d427df27ee83a6ddd4885596b0805" }, { "url": "https://git.kernel.org/stable/c/a8bc8276af9aeacabb773f0c267cfcdb847c6f2d" }, { "url": "https://git.kernel.org/stable/c/a05018739a5e6b9dc112c95bd4c59904062c8940" }, { "url": "https://git.kernel.org/stable/c/acdfa33c3cf5e1cd185cc1e0486bd0ea9f09c154" }, { "url": "https://git.kernel.org/stable/c/4bb95f4535489ed830cf9b34b0a891e384d1aee4" } ], "title": "wifi: iwlwifi: mvm: don't read past the mfuart notifcation", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/15b37c6fab9d5e40ac399fa1c725118588ed649c", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/6532f18e66b384b8d4b7e5c9caca042faaa9e8de", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/46c59a25337049a2a230ce7f7c3b9f21d0aaaad7", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/65686118845d427df27ee83a6ddd4885596b0805", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/a8bc8276af9aeacabb773f0c267cfcdb847c6f2d", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/a05018739a5e6b9dc112c95bd4c59904062c8940", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/acdfa33c3cf5e1cd185cc1e0486bd0ea9f09c154", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/4bb95f4535489ed830cf9b34b0a891e384d1aee4", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } 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"product": "SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family", "versions": [ { "status": "unaffected", "version": "0", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SCALANCE XCM-/XRM-/XCH-/XRH-300 family", "versions": [ { "status": "unaffected", "version": "0", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "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-265688.html" }, { "url": "https://cert-portal.siemens.com/productcert/html/ssa-355557.html" } ] } ] } }