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Vulnerability · Published Aug 7, 2024 · Assigned by Linux

CVE-2024-42250cachefiles: add missing lock protection when polling

High 7.8

In plain English

A high-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 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 93.4% 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: cachefiles: add missing lock protection when polling Add missing lock protection in poll routine when iterating xarray, otherwise: Even with RCU read lock held, only the slot of the radix tree is ensured to be pinned there, while the data structure (e.g. struct cachefiles_req) stored in the slot has no such guarantee. The poll routine will iterate the radix tree and dereference cachefiles_req accordingly. Thus RCU read lock is not adequate in this case and spinlock is needed here.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.106-1DEBIAN-CVE-2024-42250
Debian:13linux6.9.10-1DEBIAN-CVE-2024-42250
Debian:14linux6.9.10-1DEBIAN-CVE-2024-42250
Ubuntu:24.04:LTSlinux6.8.0-48.48UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-42250
Ubuntu:24.04:LTSlinux-aws6.8.0-1018.20UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1018.19~22.04.1UBUNTU-CVE-2024-42250
Ubuntu:24.04:LTSlinux-azure6.8.0-1017.20UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1017.20~22.04.1UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-42250
Ubuntu:24.04:LTSlinux-gcp6.8.0-1017.19UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1017.19~22.04.1UBUNTU-CVE-2024-42250
Ubuntu:24.04:LTSlinux-gke6.8.0-1013.17UBUNTU-CVE-2024-42250
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1002.4UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-48.48~22.04.1UBUNTU-CVE-2024-42250
Ubuntu:24.04:LTSlinux-ibm6.8.0-1015.15UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-42250
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-48.48.3UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-48.48.3~22.04.1UBUNTU-CVE-2024-42250
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1017.19UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1017.19~22.04.1UBUNTU-CVE-2024-42250
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1017.19.1UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-42250
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1016.16UBUNTU-CVE-2024-42250
Ubuntu:24.04:LTSlinux-oracle6.8.0-1015.16UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1015.15~22.04.1UBUNTU-CVE-2024-42250
Ubuntu:24.04:LTSlinux-raspi6.8.0-1014.16UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-42250
Ubuntu:24.04:LTSlinux-riscv6.8.0-48.48.1UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-48.48.1~22.04.2UBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-42250
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-42250

Affected products (as reported)

VendorProductVersions
Linux Linux 0e19a18f998dcabe8be590e0b39660a1f230209b – before 97cfd5e20ddc2e33e16ce369626ce76c9a475fd718943864342705fa18dd4e6b8d608491fec81f6e – before 6bb6bd3dd6f382dfd36220d4b210a0c77c066651b817e22b2e91257ace32a6768c3c003faeaa1c5c – before 8eadcab7f3dd809edbe5ae20533ff843dfea3a07b817e22b2e91257ace32a6768c3c003faeaa1c5c – before cf5bb09e742a9cf6349127e868329a8f69b7a014
Linux Linux 6.8

References