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Vulnerability · Published Jan 11, 2025 · Assigned by Linux

CVE-2024-57881mm/page_alloc: don't call pfn_to_page() on possibly non-existent PFN in split_large_buddy()

Medium 5.5

In plain English

A medium-severity null pointer dereference 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 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 92.5% 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/page_alloc: don't call pfn_to_page() on possibly non-existent PFN in split_large_buddy() In split_large_buddy(), we might call pfn_to_page() on a PFN that might not exist. In corner cases, such as when freeing the highest pageblock in the last memory section, this could result with CONFIG_SPARSEMEM && !CONFIG_SPARSEMEM_EXTREME in __pfn_to_section() returning NULL and and __section_mem_map_addr() dereferencing that NULL pointer. Let's fix it, and avoid doing a pfn_to_page() call for the first iteration, where we already have the page. So far this was found by code inspection, but let's just CC stable as the fix is easy.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.12.8-1DEBIAN-CVE-2024-57881
Debian:14linux6.12.8-1DEBIAN-CVE-2024-57881
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-57881
Ubuntu:24.04:LTSlinux-hwe-6.116.11.0-21.21~24.04.1UBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-57881
Ubuntu:24.04:LTSlinux-oem-6.116.11.0-1017.17UBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-57881
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-57881
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-57881

Affected products (as reported)

VendorProductVersions
Linux Linux fd919a85cd55be5d00a6a7372071f44c8eafb825 – before 4234ca9884bcae9e48ed38652d91696ad5cd591dfd919a85cd55be5d00a6a7372071f44c8eafb825 – before faeec8e23c10bd30e8aa759a2eb3018dae00f924
Linux Linux 6.10

Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References