Out-of-bounds Read Affecting kernel-rt package, versions *
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Test your applications- Snyk ID SNYK-CENTOS7-KERNELRT-7296381
- published 20 Jun 2024
- disclosed 20 Jun 2024
Introduced: 20 Jun 2024
CVE-2022-48714 Open this link in a new tabHow to fix?
There is no fixed version for Centos:7 kernel-rt.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt package and not the kernel-rt package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
bpf: Use VM_MAP instead of VM_ALLOC for ringbuf
After commit 2fd3fb0be1d1 ("kasan, vmalloc: unpoison VM_ALLOC pages after mapping"), non-VM_ALLOC mappings will be marked as accessible in __get_vm_area_node() when KASAN is enabled. But now the flag for ringbuf area is VM_ALLOC, so KASAN will complain out-of-bound access after vmap() returns. Because the ringbuf area is created by mapping allocated pages, so use VM_MAP instead.
After the change, info in /proc/vmallocinfo also changes from [start]-[end] 24576 ringbuf_map_alloc+0x171/0x290 vmalloc user to [start]-[end] 24576 ringbuf_map_alloc+0x171/0x290 vmap user
References
- https://access.redhat.com/security/cve/CVE-2022-48714
- https://git.kernel.org/stable/c/5e457aeab52a5947619e1f18047f4d2f3212b3eb
- https://git.kernel.org/stable/c/6304a613a97d6dcd49b93fbad31e9f39d1e138d6
- https://git.kernel.org/stable/c/b293dcc473d22a62dc6d78de2b15e4f49515db56
- https://git.kernel.org/stable/c/d578933f6226d5419af9306746efa1c693cbaf9c