Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: libbpf: Handle size overflow for ringbuf mmap The maximum size of ringbuf is 2GB on x86-64 host, so 2 * max_entries will overflow u32 when mapping producer page and data pages. Only casting max_entries to size_t is not enough, because for 32-bits application on 64-bits kernel the size of read-only mmap region also could overflow size_t. So fixing it by casting the size of read-only mmap region into a __u64 and checking whether or not there will be overflow during mmap.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.8, < 5.10.158 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0140e079a42064680394fff1199a7b5483688decPatch
- https://git.kernel.org/stable/c/535a25ab4f9a45f74ba38ab71de95e97474922edPatch
- https://git.kernel.org/stable/c/8a549ab6724520aa3c07f47e0eba820293551490Patch
- https://git.kernel.org/stable/c/927cbb478adf917e0a142b94baa37f06279cc466Patch
FAQ
What is CVE-2022-49030?
CVE-2022-49030 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: libbpf: Handle size overflow for ringbuf mmap The maximum size of ringbuf is 2GB on x86-64 host, so 2 * max_entries will overflow ...
How severe is CVE-2022-49030?
CVE-2022-49030 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-49030?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.