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: avoid leaving partial pfn mappings around in error case
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0025 16.1 —
AFFECTED
Product Versions Fixed
Linux b97a50adb37e98b940a30c4656565ff609aa8f94 – —
Linux 5.13 – 5.15.168
TIMELINE
Sep 30 Reserved by Linux
Oct 15 Published (CNA: Linux)
Aug 4 RESCORED — CVE-2024-47674 (Linux). CVSS 7.8 → 5.5 (NVD).
Description
In the Linux kernel, the following vulnerability has been resolved:
mm: avoid leaving partial pfn mappings around in error case
As Jann points out, PFN mappings are special, because unlike normal
memory mappings, there is no lifetime information associated with the
mapping - it is just a raw mapping of PFNs with no reference counting of
a 'struct page'.
That's all very much intentional, but it does mean that it's easy to
mess up the cleanup in case of errors. Yes, a failed mmap() will always
eventually clean up any partial mappings, but without any explicit
lifetime in the page table mapping itself, it's very easy to do the
error handling in the wrong order.
In particular, it's easy to mistakenly free the physical backing store
before the page tables are actually cleaned up and (temporarily) have
stale dangling PTE entries.
To make this situation less error-prone, just make sure that any partial
pfn mapping is torn down early, before any other error handling.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| September 30, 2024 | Reserved | Reserved by Linux |
| October 15, 2024 | Published | Published (CNA: Linux) |
| August 4, 2026 | RESCORED | RESCORED — CVE-2024-47674 (Linux). CVSS 7.8 → 5.5 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Linux | Linux | — | b97a50adb37e98b940a30c4656565ff609aa8f94 | — |
| Linux | Linux | — | 5.13 | 5.15.168 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2024-47674 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.