Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Linux Linux — mm/hugetlb: do not call vma_add_reservation upon ENOMEM
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0019 8.9 —
AFFECTED
Product Versions Fixed
Linux df7a6d1f64056aec572162c5d35ed9ff86ece6f3 – —
Linux 6.9 – 6.9.5
TIMELINE
Jun 25 Reserved by Linux
Jul 5 Published (CNA: Linux)
Aug 4 RESCORED — CVE-2024-39477 (Linux). CVSS 7.8 → 5.5 (NVD).
Description
In the Linux kernel, the following vulnerability has been resolved:
mm/hugetlb: do not call vma_add_reservation upon ENOMEM
sysbot reported a splat [1] on __unmap_hugepage_range(). This is because
vma_needs_reservation() can return -ENOMEM if
allocate_file_region_entries() fails to allocate the file_region struct
for the reservation.
Check for that and do not call vma_add_reservation() if that is the case,
otherwise region_abort() and region_del() will see that we do not have any
file_regions.
If we detect that vma_needs_reservation() returned -ENOMEM, we clear the
hugetlb_restore_reserve flag as if this reservation was still consumed, so
free_huge_folio() will not increment the resv count.
[1] https://lore.kernel.org/linux-mm/0000000000004096100617c58d54@google.com/T/#ma5983bc1ab18a54910da83416b3f89f3c7ee43aa
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| June 25, 2024 | Reserved | Reserved by Linux |
| July 5, 2024 | Published | Published (CNA: Linux) |
| August 4, 2026 | RESCORED | RESCORED — CVE-2024-39477 (Linux). CVSS 7.8 → 5.5 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Linux | Linux | — | df7a6d1f64056aec572162c5d35ed9ff86ece6f3 | — |
| Linux | Linux | — | 6.9 | 6.9.5 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2024-39477 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.