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Vulnerability · Published Oct 23, 2026 · Assigned by Linux

CVE-2026-99058workqueue: Fix NULL current_pwq deref in chained work check

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

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 91.2% 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: workqueue: Fix NULL current_pwq deref in chained work check current_wq_worker() only tells us that %current is a kworker. It does not guarantee that the worker is currently executing a work item, as worker->current_pwq is populated only while process_one_work() is running the work function. is_chained_work() can be reached while queueing on a draining or destroying workqueue. If a kworker outside work-item execution reaches that path, current_wq_worker() returns a worker but worker->current_pwq is NULL, and the chained-work test can fault before it emits the intended warning. Guard the chained-work test with worker->current_pwq. A kworker without current_pwq is not executing work on the target workqueue, so the helper should return false and let the draining/destroying warning fire.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-99058
Debian:13linux6.12.113-1DEBIAN-CVE-2026-99058
Debian:14linux7.2.11-1DEBIAN-CVE-2026-99058
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.10linux7.3.0-10.10UBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.10linux-aws7.3.0-1004.4UBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.10linux-azureno fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.10linux-gcp7.3.0-1004.4UBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.10linux-oracle7.3.0-1004.4UBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.10linux-raspi7.3.0-1004.4UBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.10linux-realtime7.3.0-10.10.1UBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99058
Ubuntu:26.10linux-riscv7.3.0-10.10.1UBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-99058
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-99058
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-99058

Affected products (as reported)

VendorProductVersions
Linux Linux 8d03ecfe471802d6afe97da97722b6924533aa82 – before 73bec442f913855907b63225306dd162c18e5c718d03ecfe471802d6afe97da97722b6924533aa82 – before 6877de2c75f0dd342099a1357856e6c8d474abc38d03ecfe471802d6afe97da97722b6924533aa82 – before 54361e4924c2c52a501b74ef10217c32f45fccfa8d03ecfe471802d6afe97da97722b6924533aa82 – before 3dc61af2998cfc7312d6e59bbdcd5eed074483f28d03ecfe471802d6afe97da97722b6924533aa82 – before 729d576df89c7e4341e58c452f8890620a610ac28d03ecfe471802d6afe97da97722b6924533aa82 – before b12a25fb2b9d5dac80e419d695450cc17a51fdfd8d03ecfe471802d6afe97da97722b6924533aa82 – before 1a2668682e998039a027796b236319b380078a6a8d03ecfe471802d6afe97da97722b6924533aa82 – before 980db94e3eeefdd8a1c46f86412c33a7f7806f51
Linux Linux 3.9

References