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Vulnerability · Published Sep 4, 2024 · Assigned by Linux

CVE-2024-44965x86/mm: Fix pti_clone_pgtable() alignment assumption

Medium 5.5

In plain English

A medium-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 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 87.1% 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: x86/mm: Fix pti_clone_pgtable() alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then #DF from the stack guard. It turned out that pti_clone_pgtable() had alignment assumptions on the start address, notably it hard assumes start is PMD aligned. This is true on x86_64, but very much not true on i386. These assumptions can cause the end condition to malfunction, leading to a 'short' clone. Guess what happens when the user mapping has a short copy of the entry text? Use the correct increment form for addr to avoid alignment assumptions.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.106-1DEBIAN-CVE-2024-44965
Debian:13linux6.10.6-1DEBIAN-CVE-2024-44965
Debian:14linux6.10.6-1DEBIAN-CVE-2024-44965
Ubuntu:22.04:LTSlinux5.15.0-125.135UBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux6.8.0-50.51UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-aws5.15.0-1072.78UBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-aws6.8.0-1020.22UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1020.22~22.04.1UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-azure5.15.0-1075.84UBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-azure6.8.0-1020.23UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1020.23~22.04.1UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1076.85.1UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-gcp5.15.0-1071.79UBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-gcp6.8.0-1019.21UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1019.21~22.04.1UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-gke5.15.0-1069.75UBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-gke6.8.0-1015.19UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1055.62UBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1002.4UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-50.51~22.04.1UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-ibm5.15.0-1065.68UBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-ibm6.8.0-1017.17UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1017.17~22.04.1UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1067.73UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-kvm5.15.0-1069.74UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-125.135UBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-50.51.1UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-50.51.1~22.04.1UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1067.68UBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1019.21UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1019.21~22.04.1UBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1019.21.1UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1032.32UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1020.20UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1018.18UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-oracle5.15.0-1070.76UBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-oracle6.8.0-1017.18UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1017.18~22.04.1UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-raspi5.15.0-1065.68UBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-raspi6.8.0-1016.18UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-riscv6.8.0-50.51.1UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-50.51.1~22.04.1UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-44965
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1017.18UBUNTU-CVE-2024-44965
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1038.42UBUNTU-CVE-2024-44965

Affected products (as reported)

VendorProductVersions
Linux Linux 16a3fe634f6a568c6234b8747e5d50487fed3526 – before 18da1b27ce16a14a9b636af9232acb4fb24f4c9e16a3fe634f6a568c6234b8747e5d50487fed3526 – before 25a727233a40a9b33370eec9f0cad67d8fd312f816a3fe634f6a568c6234b8747e5d50487fed3526 – before d00c9b4bbc442d99e1dafbdfdab848bc1ead73f616a3fe634f6a568c6234b8747e5d50487fed3526 – before 4d143ae782009b43b4f366402e5c37f59d4e434616a3fe634f6a568c6234b8747e5d50487fed3526 – before 5c580c1050bcbc15c3e78090859d798dcf8c976316a3fe634f6a568c6234b8747e5d50487fed3526 – before ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2ed16a3fe634f6a568c6234b8747e5d50487fed3526 – before df3eecb5496f87263d171b254ca6e2758ab3c35c16a3fe634f6a568c6234b8747e5d50487fed3526 – before 41e71dbb0e0a0fe214545fe64af031303a08524c
Linux Linux 4.19

References