CVE-2021-29648

 

Published at: - 30-03-2021 11:15

Last modified: - 26-10-2022 01:44

Total changes: - 5

Description

An issue was discovered in the Linux kernel before 5.11.11. The BPF subsystem does not properly consider that resolved_ids and resolved_sizes are intentionally uninitialized in the vmlinux BPF Type Format (BTF), which can cause a system crash upon an unexpected access attempt (in map_create in kernel/bpf/syscall.c or check_btf_info in kernel/bpf/verifier.c), aka CID-350a5c4dd245.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.11
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=350a5c4dd2452ea999cc5e1d4a8dbf12de2f97ef
• FEDORA-2021-41fb54ae9f-Mailing List, Third Party Advisory
• FEDORA-2021-6b0f287b8b-Mailing List, Third Party Advisory
• FEDORA-2021-2306e89112-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2021-29648

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures