CVE-2022-48929
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-48929
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48929.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-48929
- Downstream
- Related
- Published
- 2024-08-22T04:15:15Z
- Modified
- 2025-08-09T19:01:27Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix crash due to out of bounds access into reg2btf_ids.
When commit e6ac2450d6de ("bpf: Support bpf program calling kernel function") added kfunc support, it defined reg2btfids as a cheap way to translate the verifier reg type to the appropriate btfvmlinux BTF ID, however commit c25b2ae13603 ("bpf: Replace PTRTOXXXORNULL with PTRTOXXX | PTRMAYBENULL") moved the _BPFREGTYPEMAX from the last member of bpfregtype enum to after the base register types, and defined other variants using type flag composition. However, now, the direct usage of reg->type to index into reg2btfids may no longer fall into _BPFREGTYPE_MAX range, and hence lead to out of bounds access and kernel crash on dereference of bad pointer.
- References