7.8

CVE-2024-47676: mm/hugetlb.c: fix UAF of vma in hugetlb fault pathway

Modified
AliasesUBUNTU-CVE-2024-47676DEBIAN-CVE-2024-47676
Published 21-10-2024Last modified 05-08-2026

Vulnerability summary

CVE-2024-47676 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 5
OPENSUSE-SU-2024:14500-1OPENSUSE-SU-2025:14705-1USN-7310-1USN-7276-1USN-7277-1

Timeline

  1. 21-10-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb.c: fix UAF of vma in hugetlb fault pathway Syzbot reports a UAF in hugetlb_fault(). This happens because vmf_anon_prepare() could drop the per-VMA lock and allow the current VMA to be freed before hugetlb_vma_unlock_read() is called. We can fix this by using a modified version of vmf_anon_prepare() that doesn't release the VMA lock on failure, and then release it ourselves after hugetlb_vma_unlock_read().

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu76 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ 9acad7ba3e25d11f4c96df1b7312ae89e6faca5c, < e897d184a8dd4a4e1f39c8c495598e4d9472776c | ≥ 9acad7ba3e25d11f4c96df1b7312ae89e6faca5c, < d59ebc99dee0a2687a26df94b901eb8216dbf876 | ≥ 9acad7ba3e25d11f4c96df1b7312ae89e6faca5c, < 98b74bb4d7e96b4da5ef3126511febe55b76b807 | 6.9
  • linux_kernel≥ 6.9, < 6.10.13 | ≥ 6.11, < 6.11.2
Debian1 product
  • linux< 6.11.2-1

3 vendors · 79 products

References

10 links