Vulnerability in Linux Kernel
CVE-2021-29648
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.
EPSS: 0.003 (20.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Linux Linux_kernel
- Fedoraproject Fedora — versions 32, 33, 34
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Patch, Mailing List, x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (Patch, Mailing List, x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
- cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
- cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
Frequently asked questions
- What is CVE-2021-29648?
- CVE-2021-29648 is a medium-severity vulnerability in Linux Kernel, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 5.5/10. Published 2021-03-30.
- How severe is CVE-2021-29648?
- Medium severity. CVSS v3 base score is 5.5 out of 10.