Unrated severityNVD Advisory· Published Oct 21, 2024· Updated May 4, 2025
mm/hugetlb.c: fix UAF of vma in hugetlb fault pathway
CVE-2024-47676
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().
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Affected products
12- osv-coords10 versionspkg:deb/ubuntu/linux@6.11.0-18.18?arch=source&distro=oracularpkg:deb/ubuntu/linux-aws@6.11.0-1009.10?arch=source&distro=oracularpkg:deb/ubuntu/linux-azure@6.11.0-1009.9?arch=source&distro=oracularpkg:deb/ubuntu/linux-gcp@6.11.0-1009.9?arch=source&distro=oracularpkg:deb/ubuntu/linux-lowlatency@6.11.0-1010.11?arch=source&distro=oracularpkg:deb/ubuntu/linux-oracle@6.11.0-1011.12?arch=source&distro=oracularpkg:deb/ubuntu/linux-raspi@6.11.0-1008.8?arch=source&distro=oracularpkg:deb/ubuntu/linux-realtime@6.11.0-1005.5?arch=source&distro=oracularpkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/kernel-source-longterm&distro=openSUSE%20Tumbleweed
< 6.11.0-18.18+ 9 more
- (no CPE)range: < 6.11.0-18.18
- (no CPE)range: < 6.11.0-1009.10
- (no CPE)range: < 6.11.0-1009.9
- (no CPE)range: < 6.11.0-1009.9
- (no CPE)range: < 6.11.0-1010.11
- (no CPE)range: < 6.11.0-1011.12
- (no CPE)range: < 6.11.0-1008.8
- (no CPE)range: < 6.11.0-1005.5
- (no CPE)range: < 6.11.8-1.1
- (no CPE)range: < 6.12.11-1.1
Patches
Vulnerability mechanics
References
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