Log in Start free

Vulnerability · Published Jul 12, 2024 · Assigned by Linux

CVE-2024-40966tty: add the option to have a tty reject a new ldisc

Medium 5.5

In plain English

A medium-severity 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 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 78.5% 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: tty: add the option to have a tty reject a new ldisc ... and use it to limit the virtual terminals to just N_TTY. They are kind of special, and in particular, the "con_write()" routine violates the "writes cannot sleep" rule that some ldiscs rely on. This avoids the BUG: sleeping function called from invalid context at kernel/printk/printk.c:2659 when N_GSM has been attached to a virtual console, and gsmld_write() calls con_write() while holding a spinlock, and con_write() then tries to get the console lock.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.99-1DEBIAN-CVE-2024-40966
Debian:13linux6.9.7-1DEBIAN-CVE-2024-40966
Debian:14linux6.9.7-1DEBIAN-CVE-2024-40966
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2024-40966
Ubuntu:24.04:LTSlinux6.8.0-44.44UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2024-40966
Ubuntu:24.04:LTSlinux-aws6.8.0-1015.16UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1015.16~22.04.1UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2024-40966
Ubuntu:24.04:LTSlinux-azure6.8.0-1014.16UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1014.16~22.04.1UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2024-40966
Ubuntu:24.04:LTSlinux-gcp6.8.0-1014.16UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1014.16~22.04.1UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2024-40966
Ubuntu:24.04:LTSlinux-gke6.8.0-1010.13UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-45.45~22.04.1UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2024-40966
Ubuntu:24.04:LTSlinux-ibm6.8.0-1012.12UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1012.12~22.04.1UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2024-40966
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-44.44.1UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-44.44.1~22.04.1UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2024-40966
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1013.14UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1013.14~22.04.1UBUNTU-CVE-2024-40966
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1013.14.1UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-40966
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1012.12UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2024-40966
Ubuntu:24.04:LTSlinux-oracle6.8.0-1012.12UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1012.12~22.04.1UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2024-40966
Ubuntu:24.04:LTSlinux-raspi6.8.0-1011.12UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-40966
Ubuntu:24.04:LTSlinux-riscv6.8.0-44.44.1UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-44.44.1~22.04.1UBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-40966
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2024-40966

Affected products (as reported)

VendorProductVersions
Linux Linux e1eaea46bb4020b38a141b84f88565d4603f8dd0 – before 3c6332f3bb1578b5b10ac2561247b1d6272ae937e1eaea46bb4020b38a141b84f88565d4603f8dd0 – before 287b569a5b914903ba7c438a3c0dbc3410ebb409e1eaea46bb4020b38a141b84f88565d4603f8dd0 – before 5920ac19964f9e20181f63b410d9200ddbf8dc86e1eaea46bb4020b38a141b84f88565d4603f8dd0 – before 6bd23e0c2bb6c65d4f5754d1456bc9a4427fc59b
Linux Linux 2.6.35

References