CVE-2025-37818 — NULL Pointer Dereference in Linux

CWE-476 — NULL Pointer DereferenceCWE-400 — Uncontrolled Resource Consumption6 documents6 sources
Severity
5.5MEDIUMNVD
EPSS
0.1%
top 78.72%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
7
LinuxLinux KernelDebian Linux+4 more
Timeline
PublishedMay 8
Latest updateMay 13

Description

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Return NULL from huge_pte_offset() for invalid PMD LoongArch's huge_pte_offset() currently returns a pointer to a PMD slot even if the underlying entry points to invalid_pte_table (indicating no mapping). Callers like smaps_hugetlb_range() fetch this invalid entry value (the address of invalid_pte_table) via this pointer. The generic is_swap_pte() check then incorrectly identifies this address as a swap entry on Lo…

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages7 packages

▶NVDlinux/linux_kernel5.19 — 6.1.136+4
▶Debianlinux/linux_kernel< 6.1.137-1+2
▶CVEListV5linux/linuxfa96b57c149061f71a70bd6582d995f6424fbbf4 — 34256805720993e37adf6127371a1265aea8376a+5

Also affects: Debian Linux 11.0

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

2
OSV
CVE-2025-37818: In the Linux kernel, the following vulnerability has been resolved: LoongArch: Return NULL from huge_pte_offset() for invalid PMD LoongArch's huge_pte↗2025-05-08
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GHSA
GHSA-4q4q-jv3m-fqjr: In the Linux kernel, the following vulnerability has been resolved: LoongArch: Return NULL from huge_pte_offset() for invalid PMD LoongArch's huge_p↗2025-05-08
▶

📋Vendor Advisories

3
Microsoft
LoongArch: Return NULL from huge_pte_offset() for invalid PMD↗2025-05-13
▶
Red Hat
kernel: LoongArch: Return NULL from huge_pte_offset() for invalid PMD↗2025-05-08
▶
Debian
CVE-2025-37818: linux - In the Linux kernel, the following vulnerability has been resolved: LoongArch: ...↗2025
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