Vulnerability Description
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
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.8, < 5.10.99 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/5e457aeab52a5947619e1f18047f4d2f3212b3ebPatch
- https://git.kernel.org/stable/c/6304a613a97d6dcd49b93fbad31e9f39d1e138d6Patch
- https://git.kernel.org/stable/c/b293dcc473d22a62dc6d78de2b15e4f49515db56Patch
- https://git.kernel.org/stable/c/d578933f6226d5419af9306746efa1c693cbaf9cPatch
- https://git.kernel.org/stable/c/5e457aeab52a5947619e1f18047f4d2f3212b3ebPatch
- https://git.kernel.org/stable/c/6304a613a97d6dcd49b93fbad31e9f39d1e138d6Patch
- https://git.kernel.org/stable/c/b293dcc473d22a62dc6d78de2b15e4f49515db56Patch
- https://git.kernel.org/stable/c/d578933f6226d5419af9306746efa1c693cbaf9cPatch
FAQ
What is CVE-2022-48714?
CVE-2022-48714 is a vulnerability with a CVSS score of 7.1 (HIGH). 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"...
How severe is CVE-2022-48714?
CVE-2022-48714 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-48714?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.