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Vulnerability · Published Oct 21, 2024 · Assigned by Linux

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

High 7.8

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 84.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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().

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.11.2-1DEBIAN-CVE-2024-47676
Debian:14linux6.11.2-1DEBIAN-CVE-2024-47676
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-47676
Ubuntu:24.04:LTSlinux-oem-6.116.11.0-1015.15USN-7310-1
Ubuntu:24.04:LTSlinux-oem-6.116.11.0-1015.15UBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-47676
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-47676
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-47676

Affected products (as reported)

VendorProductVersions
Linux Linux 9acad7ba3e25d11f4c96df1b7312ae89e6faca5c – before e897d184a8dd4a4e1f39c8c495598e4d9472776c9acad7ba3e25d11f4c96df1b7312ae89e6faca5c – before d59ebc99dee0a2687a26df94b901eb8216dbf8769acad7ba3e25d11f4c96df1b7312ae89e6faca5c – before 98b74bb4d7e96b4da5ef3126511febe55b76b807
Linux Linux 6.9

References