AZL-50665
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-50665.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-50665
- Upstream
- Published
- 2024-10-21T13:15:05Z
- Modified
- 2026-04-01T05:17:35.029550Z
- 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
- CVE-2024-49850 affecting package kernel for versions less than 6.6.56.1-5
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
bpf: correctly handle malformed BPFCORETYPEIDLOCAL relos
In case of malformed relocation record of kind BPFCORETYPEIDLOCAL referencing a non-existing BTF type, function bpfcorecalcreloinsn would cause a null pointer deference.
Fix this by adding a proper check upper in call stack, as malformed relocation records could be passed from user space.
Simplest reproducer is a program:
r0 = 0 exitWith a single relocation record:
.insn_off = 0, /* patch first instruction */ .type_id = 100500, /* this type id does not exist */ .access_str_off = 6, /* offset of string "0" */ .kind = BPF_CORE_TYPE_ID_LOCAL,See the link for original reproducer or next commit for a test case.
- References