| ID |
CVE-2026-74354
|
| Sažetak |
In the Linux kernel, the following vulnerability has been resolved:
bpf: Take mmap_lock in zap_pages()
zap_vma_range() requires the owning mm's mmap_lock to be held.
Taking mmap_read_lock under arena->lock would AB-BA against
arena_vm_close() and arena_map_mmap(), both of which run with
mmap_write_lock held and then acquire arena->lock. Instead drop
arena->lock, mmget_not_zero() the vma's mm, take mmap_read_lock, and
re-resolve the vma via find_vma() since it may have been unmapped or
replaced while waiting.
Track processed vmls with a per-call generation in vml->zap_gen and
serialize zap_pages() callers with a new arena->zap_mutex so
concurrent callers on different uaddr ranges do not mark each other's
vmls processed before the zap is done. |
| Reference |
|
| CVSS |
| Base: | 0.0 |
| Impact: | None |
| Exploitability: | None |
|
| Pristup |
| Vektor | Složenost | Autentikacija |
| None |
None |
None |
|
| Impact |
| Povjerljivost | Cjelovitost | Dostupnost |
| None |
None |
None |
|
| CVSS vektor |
None |
| Zadnje važnije ažuriranje |
15-08-2026 - 06:22 |
| Objavljeno |
15-08-2026 - 06:22 |
