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Vulnerability · Published Oct 18, 2026 · Assigned by Linux

CVE-2026-98695USB: serial: fix ioctl hangup race

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 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 88.7% 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: USB: serial: fix ioctl hangup race The tty ioctls can race with hangup and end up calling into a tty driver for a device that is already gone or powered down. Serialise the callbacks using the tty port mutex and add the missing checks to make sure the port has not been hung up before accessing port driver data or hardware. This specifically avoids dereferencing a NULL-pointer if a device is disconnected during lengthy break signalling. Note that TIOCGICOUNT and TIOCMIWAIT do not access port driver data or hardware and are therefore not affected by the race.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-98695
Debian:13linux6.12.113-1DEBIAN-CVE-2026-98695
Debian:14linux7.2.10-1DEBIAN-CVE-2026-98695
Debian:12linux-6.126.12.113-1~deb12u1DEBIAN-CVE-2026-98695
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98695
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-98695
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-98695
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-98695

Affected products (as reported)

VendorProductVersions
Linux Linux f34d7a5b7010b82fe97da95496b9971435530062 – before c7ef25e96dc3f808eb891bbbd43b6a682846eb0cf34d7a5b7010b82fe97da95496b9971435530062 – before 98f0a25134bfce44ebd1db0341fa0e8603ff276df34d7a5b7010b82fe97da95496b9971435530062 – before 3a728adbed9fd822f99a9d9c5ebad5c3b565ba4af34d7a5b7010b82fe97da95496b9971435530062 – before 24d6edb6bd7f7a9e6cee2f8fe435781daab8aa0ff34d7a5b7010b82fe97da95496b9971435530062 – before ae0da9a5c1ca95c20cc5feffd511ce6eae75924ef34d7a5b7010b82fe97da95496b9971435530062 – before 4597ddd6168ae2a4123404e5f0871f1070dc7773f34d7a5b7010b82fe97da95496b9971435530062 – before 7912a95d1345c77d8d63b530b00c118700b78abdf34d7a5b7010b82fe97da95496b9971435530062 – before ae0e61d95677efa778379853e495d748e6efbf95
Linux Linux 2.6.26

References