ghsa-594v-c36q-5p83
Vulnerability from github
Published
2022-05-24 19:03
Modified
2024-03-25 03:31
Severity ?
Details
kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.
{ "affected": [], "aliases": [ "CVE-2021-33200" ], "database_specific": { "cwe_ids": [ "CWE-787" ], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2021-05-27T13:15:00Z", "severity": "HIGH" }, "details": "kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux-\u003ealu_limit.", "id": "GHSA-594v-c36q-5p83", "modified": "2024-03-25T03:31:42Z", "published": "2022-05-24T19:03:28Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33200" }, { "type": "WEB", "url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3d0220f6861d713213b015b582e9f21e5b28d2e0" }, { "type": "WEB", "url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a7036191277f9fa68d92f2071ddc38c09b1e5ee5" }, { "type": "WEB", "url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb01a1bba579b4b1c5566af24d95f1767859771e" }, { "type": "WEB", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LR3OKKPHIBGOMHN476CMLW2T7UG53QX" }, { "type": "WEB", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJCABL43FT3FKRX5DBPZG25FNKR6CEK4" }, { "type": "WEB", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7LR3OKKPHIBGOMHN476CMLW2T7UG53QX" }, { "type": "WEB", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JJCABL43FT3FKRX5DBPZG25FNKR6CEK4" }, { "type": "WEB", "url": "https://security.netapp.com/advisory/ntap-20210706-0004" }, { "type": "WEB", "url": "https://www.openwall.com/lists/oss-security/2021/05/27/1" } ], "schema_version": "1.4.0", "severity": [ { "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "type": "CVSS_V3" } ] }
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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