Kernel stack corruption via unchecked BPF iterator size
Published Nov 9, 2024 · Updated Aug 5, 2026
Integer overflow in the Linux kernel 6.11 through 6.11.6 allows local users to corrupt the kernel stack through a crafted BPF iterator. bpf_iter_bits_new() multiplies unchecked nr_words values so nr_bits wraps while bpf_probe_read_kernel_common() uses the much larger nr_bytes length. Local low-privileged access is required, and the resulting out-of-bounds kernel copy can interrupt the running system.
Summary
What happened
Integer overflow in the Linux kernel 6.11 through 6.11.6 allows local users to corrupt the kernel stack through a crafted BPF iterator. bpf_iter_bits_new() multiplies unchecked nr_words values so nr_bits wraps while bpf_probe_read_kernel_common() uses the much larger nr_bytes length. Local low-privileged access is required, and the resulting out-of-bounds kernel copy can interrupt the running system.
The record
- CVE
- CVE-2024-50253
- Published
- Nov 9, 2024
- Updated
- Aug 5, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 9, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=4665415975b0827e9646cab91c61d02a6b364d59 <393397fbdcad7396639d7077c33f86169184ba99
- Affected versionversion=4665415975b0827e9646cab91c61d02a6b364d59 <c9539e09c67880ecd88b51188c346a2cc078b06c
- Affected versionversion=6.11
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo