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Vulnerability · Published May 21, 2024 · Assigned by Linux

CVE-2021-47358staging: greybus: uart: fix tty use after free

High 7.8

In plain English

A high-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 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 84.3% 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: staging: greybus: uart: fix tty use after free User space can hold a tty open indefinitely and tty drivers must not release the underlying structures until the last user is gone. Switch to using the tty-port reference counter to manage the life time of the greybus tty state to avoid use after free after a disconnect.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.14.9-1DEBIAN-CVE-2021-47358
Debian:13linux5.14.9-1DEBIAN-CVE-2021-47358
Debian:14linux5.14.9-1DEBIAN-CVE-2021-47358
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-47358
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-47358
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-47358

Affected products (as reported)

VendorProductVersions
Linux Linux a18e15175708d39abbe9746ddc3479466b7800c3 – before 92b67aaafb7c449db9f0c3dcabc0ff967cb3a42da18e15175708d39abbe9746ddc3479466b7800c3 – before 64062fcaca8872f063ec9da011e7bf30470be33fa18e15175708d39abbe9746ddc3479466b7800c3 – before a5cfd51f6348e8fd7531461366946039c29c7e69a18e15175708d39abbe9746ddc3479466b7800c3 – before 4dc56951a8d9d61d364d346c61a5f1d70b4f5e14a18e15175708d39abbe9746ddc3479466b7800c3 – before b9e697e60ce9890e9258a73eb061288e7d68e5e6a18e15175708d39abbe9746ddc3479466b7800c3 – before 9872ff6fdce8b229f01993b611b5d1719cb70ff1a18e15175708d39abbe9746ddc3479466b7800c3 – before 92dc0b1f46e12cfabd28d709bb34f7a39431b44f
Linux Linux 4.9

References