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Vulnerability · Published Apr 17, 2024 · Assigned by Linux

CVE-2024-26878quota: Fix potential NULL pointer dereference

Medium 4.7

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 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)4.7Medium
Exploit odds (30 days)0.2%top 91.4% 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: quota: Fix potential NULL pointer dereference Below race may cause NULL pointer dereference P1 P2 dquot_free_inode quota_off drop_dquot_ref remove_dquot_ref dquots = i_dquot(inode) dquots = i_dquot(inode) srcu_read_lock dquots[cnt]) != NULL (1) dquots[type] = NULL (2) spin_lock(&dquots[cnt]->dq_dqb_lock) (3) .... If dquot_free_inode(or other routines) checks inode's quota pointers (1) before quota_off sets it to NULL(2) and use it (3) after that, NULL pointer dereference will be triggered. So let's fix it by using a temporary pointer to avoid this issue.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.85-1DEBIAN-CVE-2024-26878
Debian:13linux6.7.12-1DEBIAN-CVE-2024-26878
Debian:14linux6.7.12-1DEBIAN-CVE-2024-26878
Ubuntu:22.04:LTSlinux5.15.0-112.122UBUNTU-CVE-2024-26878
Ubuntu:24.04:LTSlinux6.8.0-35.35UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-aws5.15.0-1063.69UBUNTU-CVE-2024-26878
Ubuntu:24.04:LTSlinux-aws6.8.0-1009.9UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-azure5.15.0-1066.75UBUNTU-CVE-2024-26878
Ubuntu:24.04:LTSlinux-azure6.8.0-1008.8UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1067.76.1UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-gcp5.15.0-1062.70UBUNTU-CVE-2024-26878
Ubuntu:24.04:LTSlinux-gcp6.8.0-1008.9UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-gke5.15.0-1060.66UBUNTU-CVE-2024-26878
Ubuntu:24.04:LTSlinux-gke6.8.0-1004.7UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1046.53UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-ibm5.15.0-1056.59UBUNTU-CVE-2024-26878
Ubuntu:24.04:LTSlinux-ibm6.8.0-1006.6UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1058.64UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-kvm5.15.0-1060.65UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-110.120UBUNTU-CVE-2024-26878
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-35.35.1UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1058.59UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1026.26UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1015.15UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-26878
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1006.6UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-oracle5.15.0-1061.67UBUNTU-CVE-2024-26878
Ubuntu:24.04:LTSlinux-oracle6.8.0-1006.6UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-raspi5.15.0-1058.61UBUNTU-CVE-2024-26878
Ubuntu:24.04:LTSlinux-raspi6.8.0-1005.5UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-26878
Ubuntu:24.04:LTSlinux-riscv6.8.0-35.35.1UBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-26878
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1030.34UBUNTU-CVE-2024-26878

Affected products (as reported)

VendorProductVersions
Linux Linux 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac – before 8514899c1a4edf802f03c408db901063aa3f05a17b9ca4c61bc278b771fb57d6290a31ab1fc7fdac – before 49669f8e7eb053f91d239df7b1bfb4500255a9d07b9ca4c61bc278b771fb57d6290a31ab1fc7fdac – before 61380537aa6dd32d8a723d98b8f1bd1b11d8fee07b9ca4c61bc278b771fb57d6290a31ab1fc7fdac – before 1ca72a3de915f87232c9a4cb9bebbd3af8ed3e257b9ca4c61bc278b771fb57d6290a31ab1fc7fdac – before 7f9e833fc0f9b47be503af012eb59030869397547b9ca4c61bc278b771fb57d6290a31ab1fc7fdac – before 40a673b4b07efd6f74ff3ab60f38b26aa91ee5d57b9ca4c61bc278b771fb57d6290a31ab1fc7fdac – before f2649d98aa9ca8623149b3cb8df00c944f5655c77b9ca4c61bc278b771fb57d6290a31ab1fc7fdac – before 6afc9f4434fa8063aa768c2bf5bf98583aee0877
Linux Linux 4.14

References