CVE-2026-74354
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.
Affected versions
Linux kernel versions
6.9
and later are affected. Fixed in
7.1.5,
7.2-rc1
and their respective stable series.
References
2 totalFrequently asked questions
-
What is CVE-2026-74354?
CVE-2026-74354 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.9 onward and has been patched in 7.1.5 and 7.2-rc1. CVE-2026-74354 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2026-74354?
Yes. CVE-2026-74354 has been patched. Fixed versions include 7.1.5 and 7.2-rc1. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2026-74354 actively exploited?
No. CVE-2026-74354 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.