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Vulnerability · Published Oct 21, 2024 · Assigned by Linux

CVE-2024-49960ext4: fix timer use-after-free on failed mount

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 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.3%top 78.4% 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: ext4: fix timer use-after-free on failed mount Syzbot has found an ODEBUG bug in ext4_fill_super The del_timer_sync function cancels the s_err_report timer, which reminds about filesystem errors daily. We should guarantee the timer is no longer active before kfree(sbi). When filesystem mounting fails, the flow goes to failed_mount3, where an error occurs when ext4_stop_mmpd is called, causing a read I/O failure. This triggers the ext4_handle_error function that ultimately re-arms the timer, leaving the s_err_report timer active before kfree(sbi) is called. Fix the issue by canceling the s_err_report timer after calling ext4_stop_mmpd.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.119-1DSA-5818-1
Debian:12linux6.1.119-1DEBIAN-CVE-2024-49960
Debian:13linux6.11.4-1DEBIAN-CVE-2024-49960
Debian:14linux6.11.4-1DEBIAN-CVE-2024-49960
Ubuntu:22.04:LTSlinux5.15.0-144.157UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux5.15.0-144.157USN-7654-1
Ubuntu:24.04:LTSlinux6.8.0-54.56UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-aws5.15.0-1088.95UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-aws5.15.0-1088.95USN-7654-1
Ubuntu:24.04:LTSlinux-aws6.8.0-1023.25UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1023.25~22.04.1UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-azure5.15.0-1094.103UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-azure5.15.0-1094.103USN-7711-1
Ubuntu:24.04:LTSlinux-azure6.8.0-1025.30UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-azure-6.116.11.0-1012.12~24.04.1UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1025.30~22.04.1UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1094.103.1UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-azure-nvidia6.8.0-1014.15UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-gcp5.15.0-1087.96UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-gcp5.15.0-1087.96USN-7654-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1024.26UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-gcp-6.116.11.0-1011.11~24.04.1UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1024.26~22.04.1UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-gke5.15.0-1085.91USN-7654-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1085.91UBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-gke6.8.0-1019.23UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1070.78USN-7654-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1070.78UBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1006.8UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-57.59~22.04.1UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-ibm5.15.0-1080.83USN-7654-1
Ubuntu:22.04:LTSlinux-ibm5.15.0-1080.83UBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-ibm6.8.0-1022.22UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1023.23~22.04.1UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1083.89UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1083.89USN-7654-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1084.89UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-kvm5.15.0-1084.89USN-7654-4
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-144.157UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-144.157USN-7654-1
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-54.56.1UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-54.56.1~22.04.1UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1082.83UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1082.83USN-7654-1
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1022.25UBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-nvidia-6.116.11.0-1007.7UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1022.25~22.04.2UBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1022.25.2UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1041.41UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1041.41USN-7654-1
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1030.30UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1030.30USN-7654-1
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-oem-6.116.11.0-1015.15UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1024.24UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-oracle5.15.0-1085.91USN-7654-1
Ubuntu:22.04:LTSlinux-oracle5.15.0-1085.91UBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-oracle6.8.0-1020.21UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1020.21~22.04.1UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-raspi5.15.0-1083.86UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-raspi5.15.0-1083.86USN-7686-1
Ubuntu:24.04:LTSlinux-raspi6.8.0-1019.23UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-riscv6.8.0-53.55.1UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-53.55.1~22.04.1UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-49960
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1017.18UBUNTU-CVE-2024-49960
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1052.56USN-7654-5
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1052.56UBUNTU-CVE-2024-49960

Affected products (as reported)

VendorProductVersions
Linux Linux 5e4f5138bd8522ebe231a137682d3857209a2c07 – before 7aac0c17a8cdf4a3236991c1e60435c6a984076c618f003199c6188e01472b03cdbba227f1dc5f24 – before 22e9b83f0f33bc5a7a3181769d1dccbf021f5b04618f003199c6188e01472b03cdbba227f1dc5f24 – before cf3196e5e2f36cd80dab91ffae402e13935724bc618f003199c6188e01472b03cdbba227f1dc5f24 – before 9203817ba46ebba7c865c8de2aba399537b6e891618f003199c6188e01472b03cdbba227f1dc5f24 – before fa78fb51d396f4f2f80f8e96a3b1516f394258be618f003199c6188e01472b03cdbba227f1dc5f24 – before b85569585d0154d4db1e4f9e3e6a4731d407feb0618f003199c6188e01472b03cdbba227f1dc5f24 – before 0ce160c5bdb67081a62293028dc85758a8efb22acecfdb9cf9a700d1037066173abac0617f6788df
Linux Linux 5.14

References