CVE-2022-1462

Description

An out-of-bounds read flaw was found in the Linux kernel’s TeleTYpe subsystem. The issue occurs in how a user triggers a race condition using ioctls TIOCSPTLCK and TIOCGPTPEER and TIOCSTI and TCXONC with leakage of memory in the flush_to_ldisc function. This flaw allows a local user to crash the system or read unauthorized random data from memory.

CVSS Metrics

• v3.1•MEDIUM•Score: 6.3CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
• v2.0•LOW•Score: 3.3AV:L/AC:M/Au:N/C:P/I:N/A:P

EPSS Trends

Current EPSS score: 0.05%• Percentile: 14%

Techniques & Countermeasures

• CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

  The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Affected Systems

• debian•debian_linux

  10.0

• linux•linux_kernel

  na

• redhat•enterprise_linux

  8.0 | 9.0

References (3)

• https://bugzilla.redhat.com/show_bug.cgi?id=2078466
• https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
• https://seclists.org/oss-sec/2022/q2/155