UBUNTU-CVE-2025-37818

See a problem?
Please try reporting it to the source first.

Source

https://ubuntu.com/security/CVE-2025-37818

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-37818.json

JSON Data

https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2025-37818

Upstream

CVE-2025-37818

Published

2025-05-08T07:15:00Z

Modified

2026-02-06T21:59:04Z

Severity

5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

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 LoongArch, because it satisfies the "!pte_present() && !pte_none()" conditions. This misinterpretation, combined with a coincidental match by is_migration_entry() on the address bits, leads to kernel crashes in pfn_swap_entry_to_page(). Fix this at the architecture level by modifying huge_pte_offset() to check the PMD entry's content using pmd_none() before returning. If the entry is invalid (i.e., it points to invalid_pte_table), return NULL instead of the pointer to the slot.

References

Affected packages

Ubuntu:24.04:LTS / linux-gcp-6.14

Package

Name: linux-gcp-6.14
Purl: pkg:deb/ubuntu/linux-gcp-6.14@6.14.0-1011.11~24.04.1?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

6.14.0-1011.11~24.04.1

Affected versions

6.*

6.14.0-1007.7~24.04.1

Ecosystem specific

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "linux-buildinfo-6.14.0-1011-gcp",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-buildinfo-6.14.0-1011-gcp-64k",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-gcp-6.14-headers-6.14.0-1011",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-gcp-6.14-tools-6.14.0-1011",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-headers-6.14.0-1011-gcp",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-headers-6.14.0-1011-gcp-64k",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-image-unsigned-6.14.0-1011-gcp",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-image-unsigned-6.14.0-1011-gcp-64k",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-lib-rust-6.14.0-1011-gcp",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-modules-6.14.0-1011-gcp",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-modules-6.14.0-1011-gcp-64k",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-modules-extra-6.14.0-1011-gcp",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-modules-extra-6.14.0-1011-gcp-64k",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-tools-6.14.0-1011-gcp",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        },
        {
            "binary_name":  "linux-tools-6.14.0-1011-gcp-64k",
            "binary_version":  "6.14.0-1011.11~24.04.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-37818.json"

Ubuntu:Pro:Realtime:24.04:LTS / linux-realtime-6.14