Vulnerability · Published May 1, 2024 · Assigned by Linux

CVE-2024-26993fs: sysfs: Fix reference leak in sysfs_break_active_protection()

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 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 81.1% 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: fs: sysfs: Fix reference leak in sysfs_break_active_protection() The sysfs_break_active_protection() routine has an obvious reference leak in its error path. If the call to kernfs_find_and_get() fails then kn will be NULL, so the companion sysfs_unbreak_active_protection() routine won't get called (and would only cause an access violation by trying to dereference kn->parent if it was called). As a result, the reference to kobj acquired at the start of the function will never be released. Fix the leak by adding an explicit kobject_put() call when kn is NULL.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9bpftool7.3.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k-debug5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k-debug-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k-debug-devel5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k-debug-modules5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k-devel5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k-devel-matched5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k-modules5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k-modules-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-64k-modules-extra5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-abi-stablelists5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-cross-headers5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-debug5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-debug-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-debug-devel5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-debug-devel-matched5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-debug-modules5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-debug-modules-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-debug-modules-extra5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-debug-uki-virt5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-devel5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-devel-matched5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-doc5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-headers5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-modules5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-modules-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-modules-extra5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:8kernel-rt4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:9kernel-rt5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:8kernel-rt-core4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:9kernel-rt-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:8kernel-rt-debug4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:9kernel-rt-debug5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:8kernel-rt-debug-core4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:9kernel-rt-debug-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:9kernel-rt-debug-devel5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:8kernel-rt-debug-kvm4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:9kernel-rt-debug-modules5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:8kernel-rt-devel4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:9kernel-rt-devel5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:8kernel-rt-kvm4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:8kernel-rt-modules4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:9kernel-rt-modules5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-rt-modules-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.5.1.rt7.346.el8_10ALSA-2024:3627
AlmaLinux:9kernel-rt-modules-extra5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-tools5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-tools-libs5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-tools-libs-devel5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-uki-virt5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-zfcpdump5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-zfcpdump-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-zfcpdump-devel5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-zfcpdump-modules5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9libperf5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9perf5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9python3-perf5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9rtla5.14.0-427.20.1.el9_4ALSA-2024:3619
AlmaLinux:9rv5.14.0-427.20.1.el9_4ALSA-2024:3619
Debian:12linux6.1.90-1DEBIAN-CVE-2024-26993
Debian:12linux6.1.90-1DSA-5680-1
Debian:13linux6.8.9-1DEBIAN-CVE-2024-26993
Debian:14linux6.8.9-1DEBIAN-CVE-2024-26993
Rocky Linux:9kernel0:5.14.0-427.20.1.el9_4RLSA-2024:3619
Rocky Linux:8kernel-rt0:4.18.0-553.5.1.rt7.346.el8_10RLSA-2024:3627
Ubuntu:22.04:LTSlinux5.15.0-116.126UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux6.8.0-38.38UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux6.8.0-38.38USN-6893-1
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-aws5.15.0-1065.71UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-aws6.8.0-1011.12UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-aws6.8.0-1011.12USN-6893-3
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1011.12~22.04.1UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-azure5.15.0-1068.77UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-azure6.8.0-1010.10USN-6893-1
Ubuntu:24.04:LTSlinux-azure6.8.0-1010.10UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1010.10~22.04.1UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1068.77.1UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-gcp5.15.0-1064.72UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-gcp6.8.0-1010.11USN-6893-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1010.11UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-gke5.15.0-1062.68UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-gke6.8.0-1006.9UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-gke6.8.0-1006.9USN-6893-2
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1048.55UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-ibm5.15.0-1058.61UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-ibm6.8.0-1008.8USN-6893-1
Ubuntu:24.04:LTSlinux-ibm6.8.0-1008.8UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-intel6.8.0-1007.14USN-6893-1
Ubuntu:24.04:LTSlinux-intel6.8.0-1007.14UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1060.66UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-kvm5.15.0-1062.67UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-116.126UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-38.38.1UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-38.38.1USN-6893-1
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1060.61UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1009.9USN-6893-2
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1009.9UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1009.9~22.04.1UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1026.26UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1015.15UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1008.8USN-6893-1
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1008.8UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-oracle5.15.0-1063.69UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-oracle6.8.0-1008.8UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-oracle6.8.0-1008.8USN-6918-1
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1008.8~22.04.1UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-raspi5.15.0-1058.61UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-raspi6.8.0-1007.7UBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-raspi6.8.0-1007.7USN-6893-1
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-26993
Ubuntu:24.04:LTSlinux-riscv6.8.0-38.38.1UBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-26993
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1035.39UBUNTU-CVE-2024-26993

Affected products (as reported)

VendorProductVersions
Linux Linux 2afc9166f79b8f6da5f347f48515215ceee4ae37 – before f28bba37fe244889b81bb5c508d3f6e5c6e342c52afc9166f79b8f6da5f347f48515215ceee4ae37 – before 57baab0f376bec8f54b0fe6beb8f77a57c2280632afc9166f79b8f6da5f347f48515215ceee4ae37 – before 84bd4c2ae9c3d0a7d3a5c032ea7efff17af17e172afc9166f79b8f6da5f347f48515215ceee4ae37 – before 43f00210cb257bcb0387e8caeb4b46375d67f30c2afc9166f79b8f6da5f347f48515215ceee4ae37 – before 5d43e072285e81b0b63cee7189b3357c7768a43b2afc9166f79b8f6da5f347f48515215ceee4ae37 – before ac107356aabc362aaeb77463e814fc067a5d39572afc9166f79b8f6da5f347f48515215ceee4ae37 – before a4c99b57d43bab45225ba92d574a8683f9edc8e42afc9166f79b8f6da5f347f48515215ceee4ae37 – before a90bca2228c0646fc29a72689d308e5fe03e6d78
Linux Linux 4.19

References