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Vulnerability · Published Oct 18, 2026 · Assigned by Linux

CVE-2026-98755tty: vcc: zero-initialize control packet in vcc_send_ctl()

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 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 92.8% 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: tty: vcc: zero-initialize control packet in vcc_send_ctl() The stack-allocated struct vio_vcc pkt was partially initialized, leaving the tag.stype_env field uninitialized before being sent via ldc_write(), potentially leaking kernel stack data to the LDC peer.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-98755
Debian:13linux6.12.113-1DEBIAN-CVE-2026-98755
Debian:14linux7.2.10-1DEBIAN-CVE-2026-98755
Debian:12linux-6.126.12.113-1~deb12u1DEBIAN-CVE-2026-98755
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98755
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-98755
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-98755
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-98755

Affected products (as reported)

VendorProductVersions
Linux Linux 8868e44a56160328cd4003d95f4083f64b136e33 – before 9e2eedb3611c1a3a377105cb26af52731e826fa58868e44a56160328cd4003d95f4083f64b136e33 – before 360111628a968ebc8e6da400b28f23ae317d4e048868e44a56160328cd4003d95f4083f64b136e33 – before 639178bc8e77aad307a9ee5e62471c5dcc8dda678868e44a56160328cd4003d95f4083f64b136e33 – before 4b59afc8af3143ae03e4f9b81ca66aa5a1c1ebed8868e44a56160328cd4003d95f4083f64b136e33 – before 6f1a08ef02825b440126c406ea63ef6128888e158868e44a56160328cd4003d95f4083f64b136e33 – before 4335278d0e75395cbfaf71c84b521df56d69e9368868e44a56160328cd4003d95f4083f64b136e33 – before 399aa38af1d78001612e3130b2056ea392a355ca8868e44a56160328cd4003d95f4083f64b136e33 – before 1f71f565e3585da1098ff19ca3c24687dab59185
Linux Linux 4.14

References