ghsa-w83r-gj25-6vrc
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
bpf, arm64: Fix address emission with tag-based KASAN enabled
When BPF_TRAMP_F_CALL_ORIG is enabled, the address of a bpf_tramp_image struct on the stack is passed during the size calculation pass and an address on the heap is passed during code generation. This may cause a heap buffer overflow if the heap address is tagged because emit_a64_mov_i64() will emit longer code than it did during the size calculation pass. The same problem could occur without tag-based KASAN if one of the 16-bit words of the stack address happened to be all-ones during the size calculation pass. Fix the problem by assuming the worst case (4 instructions) when calculating the size of the bpf_tramp_image address emission.
{ "affected": [], "aliases": [ "CVE-2024-50203" ], "database_specific": { "cwe_ids": [ "CWE-787" ], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2024-11-08T06:15:16Z", "severity": "HIGH" }, "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, arm64: Fix address emission with tag-based KASAN enabled\n\nWhen BPF_TRAMP_F_CALL_ORIG is enabled, the address of a bpf_tramp_image\nstruct on the stack is passed during the size calculation pass and\nan address on the heap is passed during code generation. This may\ncause a heap buffer overflow if the heap address is tagged because\nemit_a64_mov_i64() will emit longer code than it did during the size\ncalculation pass. The same problem could occur without tag-based\nKASAN if one of the 16-bit words of the stack address happened to\nbe all-ones during the size calculation pass. Fix the problem by\nassuming the worst case (4 instructions) when calculating the size\nof the bpf_tramp_image address emission.", "id": "GHSA-w83r-gj25-6vrc", "modified": "2024-11-19T18:30:54Z", "published": "2024-11-08T06:30:49Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50203" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/7db1a2121f3c7903b8e397392beec563c3d00950" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/a552e2ef5fd1a6c78267cd4ec5a9b49aa11bbb1c" } ], "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" } ] }
Sightings
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