Review reviewHigh

CVE-2024-47676

Linux Linux, linux kernel

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: 7.8
EPSS: -
CISA KEV: Not listed
Published: 2024.10.21

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability-

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux Linux, linux kernel
Affected versions: >= 9acad7ba3e25d11f4c96df1b7312ae89e6faca5c < e897d184a8dd4a4e1f39c8c495598e4d9472776c, >= 9acad7ba3e25d11f4c96df1b7312ae89e6faca5c < d59ebc99dee0a2687a26df94b901eb8216dbf876, >= 9acad7ba3e25d11f4c96df1b7312ae89e6faca5c < 98b74bb4d7e96b4da5ef3126511febe55b76b807, >= 6.9, >= 6.9 < 6.10.13, >= 6.11 < 6.11.2
Fixed versions: 6.10.13, 6.11.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux Linux, linux kernel and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-416