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This issue was addressed in the upstream kernel in commit 9b00f1b78809 (\"bpf: Fix truncation handling for mod32 dst reg wrt zero\") and in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101." } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1" } } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-681", "description": "CWE-681: Incorrect Conversion between Numeric Types", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "dateUpdated": "2021-11-12T18:06:17.000Z", "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical" }, "references": [ { "tags": [ "x_refsource_MISC" ], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9b00f1b78809" }, { "tags": [ "x_refsource_MISC" ], "url": "https://www.openwall.com/lists/oss-security/2021/03/23/2" }, { "name": "[oss-security] 20210323 [CVE-2021-3444] Linux kernel bpf verifier incorrect mod32 truncation", "tags": [ "mailing-list", "x_refsource_MLIST" ], "url": "http://www.openwall.com/lists/oss-security/2021/03/23/2" }, { "tags": [ "x_refsource_MISC" ], "url": "http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html" }, { "tags": [ "x_refsource_CONFIRM" ], "url": "https://security.netapp.com/advisory/ntap-20210416-0006/" }, { "name": "[debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update", "tags": [ "mailing-list", "x_refsource_MLIST" ], "url": "https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html" }, { "tags": [ "x_refsource_MISC" ], "url": "http://packetstormsecurity.com/files/164950/Kernel-Live-Patch-Security-Notice-LSN-0082-1.html" } ], "solutions": [ { "lang": "en", "value": "Apply or update to a kernel that contains the commit 9b00f1b78809 (\"bpf: Fix truncation handling for mod32 dst reg wrt zero\")." } ], "source": { "discovery": "EXTERNAL" }, "title": "Linux kernel bpf verifier incorrect mod32 truncation", "x_generator": { "engine": "Vulnogram 0.0.9" }, "x_legacyV4Record": { "CVE_data_meta": { "ASSIGNER": "security@ubuntu.com", "DATE_PUBLIC": "2021-03-23T00:00:00.000Z", "ID": "CVE-2021-3444", "STATE": "PUBLIC", "TITLE": "Linux kernel bpf verifier incorrect mod32 truncation" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "kernel", "version": { "version_data": [ { "version_affected": "<", "version_name": "trunk", "version_value": "5.12-rc1" }, { "version_affected": "<", "version_name": "5.11", "version_value": "5.11.2" }, { "version_affected": "<", "version_name": "5.10", "version_value": "5.10.19" }, { "version_affected": "<", "version_name": "5.4", "version_value": "5.4.101" } ] } } ] }, "vendor_name": "Linux" } ] } }, "credit": [ { "lang": "eng", "value": "De4dCr0w of 360 Alpha Lab" } ], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. 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