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Vulnerability · Published Sep 11, 2026 · Assigned by Linux

CVE-2026-89484lockd: fix NULL dereference on lockowner allocation failure

Unrated

In plain English

A 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 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 88.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: lockd: fix NULL dereference on lockowner allocation failure nlmclnt_locks_init_private() installs NLM file lock operations even when nlmclnt_find_lockowner() fails to allocate a lockowner. nlmclnt_proc() then returns -ENOMEM, but the VFS still tears down the partially initialized file_lock and calls locks_release_private(). That invokes nlmclnt_locks_release_private(), which dereferences fl->fl_u.nfs_fl.owner and crashes because the owner was never installed. Clear fl_ops before attempting to initialize the NLM private state, and install the NLM lock operations only after a lockowner has been allocated successfully.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-89484
Debian:13linux6.12.111-1DEBIAN-CVE-2026-89484
Debian:14linux7.2.6-1DEBIAN-CVE-2026-89484
Debian:12linux-6.126.12.111-1~deb12u1DEBIAN-CVE-2026-89484
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-89484
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-89484
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-89484
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-89484

Affected products (as reported)

VendorProductVersions
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before b61053a3795c2913a7af3ab6218acfdaf52fcafe1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 6db5af172ccc3223c8f730a9a4212f6427feee3e1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 07adfbb3de7529f58ca708a97ead7fa4fdb710561da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before d662f7fc04fde305a27f304b3cd19b614d3668391da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 51af080ca4e553256c59a75a877b9b4fff8283111da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 4c7fc129db061c7daab841c4f3c342d894832362
Linux Linux 2.6.12

References