CVE-2024-47676

HIGH EPSS 15.2%
Published Oct 21, 20241y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Oct 21, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
15.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 2

VendorProductVersionRange
linuxlinux_kernel*≥6.9  –  <6.10.13
linuxlinux_kernel*≥6.11  –  <6.11.2

References 3

  • git.kernel.org https://git.kernel.org/stable/c/98b74bb4d7e96b4da5ef3126511febe55b76b807
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d59ebc99dee0a2687a26df94b901eb8216dbf876
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e897d184a8dd4a4e1f39c8c495598e4d9472776c
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/98b74bb4d7e96b4da5ef3126511febe55b76b807
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d59ebc99dee0a2687a26df94b901eb8216dbf876
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e897d184a8dd4a4e1f39c8c495598e4d9472776c
    Patch