CVE-2022-48714
N/A
Summary
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
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 457f44363a8894135c85b7a9afd2bd8196db24ab < 6304a613a97d6dcd49b93fbad31e9f39d1e138d6 | affected |
| Linux | Linux | 457f44363a8894135c85b7a9afd2bd8196db24ab < 5e457aeab52a5947619e1f18047f4d2f3212b3eb | affected |
| Linux | Linux | 457f44363a8894135c85b7a9afd2bd8196db24ab < d578933f6226d5419af9306746efa1c693cbaf9c | affected |
| Linux | Linux | 457f44363a8894135c85b7a9afd2bd8196db24ab < b293dcc473d22a62dc6d78de2b15e4f49515db56 | affected |
| Linux | Linux | 5.8 | affected |
| Linux | Linux | 0 < 5.8 | unaffected |
| Linux | Linux | 5.10.99 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.22 <= 5.15.* | unaffected |
| Linux | Linux | 5.16.8 <= 5.16.* | unaffected |
| Linux | Linux | 5.17 <= * | unaffected |
Weaknesses
ADP Enrichment
CVE Program Container
Additional References
- https://git.kernel.org/stable/c/6304a613a97d6dcd49b93fbad31e9f39d1e138d6
- https://git.kernel.org/stable/c/5e457aeab52a5947619e1f18047f4d2f3212b3eb
- https://git.kernel.org/stable/c/d578933f6226d5419af9306746efa1c693cbaf9c
- https://git.kernel.org/stable/c/b293dcc473d22a62dc6d78de2b15e4f49515db56
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://git.kernel.org/stable/c/6304a613a97d6dcd49b93fbad31e9f39d1e138d6
- https://git.kernel.org/stable/c/5e457aeab52a5947619e1f18047f4d2f3212b3eb
- https://git.kernel.org/stable/c/d578933f6226d5419af9306746efa1c693cbaf9c
- https://git.kernel.org/stable/c/b293dcc473d22a62dc6d78de2b15e4f49515db56
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