high7.8
CVE-2022-49030
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 …
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 5.8 before 5.10.158 from 5.11 before 5.15.82 from 5.16 before 6.0.12 Version 6.1 |
Weakness classification
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/0140e079a42064680394fff1199a7b5483688dec
- https://git.kernel.org/stable/c/535a25ab4f9a45f74ba38ab71de95e97474922ed
- https://git.kernel.org/stable/c/8a549ab6724520aa3c07f47e0eba820293551490
- https://git.kernel.org/stable/c/927cbb478adf917e0a142b94baa37f06279cc466