cve-2022-49030
Vulnerability from cvelistv5
Published
2024-10-21 20:06
Modified
2024-12-19 08:12
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0140e079a42064680394fff1199a7b5483688decPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/535a25ab4f9a45f74ba38ab71de95e97474922edPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8a549ab6724520aa3c07f47e0eba820293551490Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/927cbb478adf917e0a142b94baa37f06279cc466Patch
Impacted products
Vendor Product Version
Linux Linux Version: bf99c936f9478a05d51e9f101f90de70bee9a89c
Version: bf99c936f9478a05d51e9f101f90de70bee9a89c
Version: bf99c936f9478a05d51e9f101f90de70bee9a89c
Version: bf99c936f9478a05d51e9f101f90de70bee9a89c
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   Linux Linux Version: 5.8
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