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Vulnerability · Published Mar 10, 2026 · Assigned by Linux

CVE-2026-23239espintcp: Fix race condition in espintcp_close()

High 7.8

In plain English

A high-severity race condition 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 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 97.1% 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: espintcp: Fix race condition in espintcp_close() This issue was discovered during a code audit. After cancel_work_sync() is called from espintcp_close(), espintcp_tx_work() can still be scheduled from paths such as the Delayed ACK handler or ksoftirqd. As a result, the espintcp_tx_work() worker may dereference a freed espintcp ctx or sk. The following is a simple race scenario: cpu0 cpu1 espintcp_close() cancel_work_sync(&ctx->work); espintcp_write_space() schedule_work(&ctx->work); To prevent this race condition, cancel_work_sync() is replaced with disable_work_sync().

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-23239
Debian:13linux6.12.85-1DEBIAN-CVE-2026-23239
Debian:14linux6.19.6-1DEBIAN-CVE-2026-23239
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-23239
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-23239
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-23239
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-23239
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-23239
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-23239
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-23239
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-23239
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-23239
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-23239
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-23239
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-23239

Affected products (as reported)

VendorProductVersions
Linux Linux e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 – before f7ad8b1d0e421c524604d5076b73232093490d5ce27cca96cd68fa2c6814c90f9a1cfd36bb68c593 – before 664e9df53226b4505a0894817ecad2c610ab11d8e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 – before 022ff7f347588de6e17879a1da6019647b21321be27cca96cd68fa2c6814c90f9a1cfd36bb68c593 – before e1512c1db9e8794d8d130addd2615ec27231d994
Linux Linux 5.6

Weakness: CWE-362 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References