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Vulnerability · Published Oct 21, 2024 · Assigned by Linux

CVE-2024-49957ocfs2: fix null-ptr-deref when journal load failed.

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 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 83.6% 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: ocfs2: fix null-ptr-deref when journal load failed. During the mounting process, if journal_reset() fails because of too short journal, then lead to jbd2_journal_load() fails with NULL j_sb_buffer. Subsequently, ocfs2_journal_shutdown() calls jbd2_journal_flush()->jbd2_cleanup_journal_tail()-> __jbd2_update_log_tail()->jbd2_journal_update_sb_log_tail() ->lock_buffer(journal->j_sb_buffer), resulting in a null-pointer dereference error. To resolve this issue, we should check the JBD2_LOADED flag to ensure the journal was properly loaded. Additionally, use journal instead of osb->journal directly to simplify the code.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.115-1DEBIAN-CVE-2024-49957
Debian:13linux6.11.4-1DEBIAN-CVE-2024-49957
Debian:14linux6.11.4-1DEBIAN-CVE-2024-49957
Ubuntu:22.04:LTSlinux5.15.0-127.137UBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux6.8.0-54.56UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-aws5.15.0-1073.79UBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-aws6.8.0-1023.25UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1023.25~22.04.1UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-azure5.15.0-1078.87UBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-azure6.8.0-1025.30UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-azure-6.116.11.0-1012.12~24.04.1UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1025.30~22.04.1UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1078.87.1UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-azure-nvidia6.8.0-1014.15UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-gcp5.15.0-1072.80UBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-gcp6.8.0-1024.26UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-gcp-6.116.11.0-1011.11~24.04.1UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1024.26~22.04.1UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-gke5.15.0-1070.76UBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-gke6.8.0-1019.23UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1056.63UBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1006.8UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-57.59~22.04.1UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-ibm5.15.0-1066.69UBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-ibm6.8.0-1022.22UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1023.23~22.04.1UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1071.77UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-kvm5.15.0-1070.75UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-127.137UBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-54.56.1UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-54.56.1~22.04.1UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1068.69UBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1022.25UBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-nvidia-6.116.11.0-1007.7UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1022.25~22.04.2UBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1022.25.2UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1032.32UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1020.20UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-oem-6.116.11.0-1015.15UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1024.24UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-oracle5.15.0-1071.77UBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-oracle6.8.0-1020.21UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1020.21~22.04.1UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-raspi5.15.0-1066.69UBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-raspi6.8.0-1019.23UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-riscv6.8.0-53.55.1UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-53.55.1~22.04.1UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-49957
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1017.18UBUNTU-CVE-2024-49957
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1039.43UBUNTU-CVE-2024-49957

Affected products (as reported)

VendorProductVersions
Linux Linux f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 – before fd89d92c1140cee8f59de336cb37fa65e359c123f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 – before 703b2c7e0798d263154dc8593dc2345f75dc077ff6f50e28f0cb8d7bcdfaacc83129f005dede11b1 – before bf605ae98dab5c15c5b631d4d7f88898cb41b649f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 – before ff55291fb36779819211b596da703389135f5b05f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 – before 82dfdd1e31e774578f76ce6dc90c834f96403a0ff6f50e28f0cb8d7bcdfaacc83129f005dede11b1 – before 86a89e75e9e4dfa768b97db466ad6bedf2e7ea5bf6f50e28f0cb8d7bcdfaacc83129f005dede11b1 – before f60e94a83db799bde625ac8671a5b4a6354e7120f6f50e28f0cb8d7bcdfaacc83129f005dede11b1 – before 387bf565cc03e2e8c720b8b4798efea4aacb6962
Linux Linux 2.6.32

References