CVEvulnerability

CVE-2020-12826

5.3 MEDIUM Published 2020-05-12 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-05-12
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS 2.0 ([email protected])
4.4 MEDIUM — AV:L/AC:M/Au:N/C:P/I:P/A:P
Weaknesses
CWE-190

Description

A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat.

Affected configurations

• linux linux kernel (< 5.6.5) • canonical ubuntu linux 20.04 • redhat enterprise linux 5.0 • redhat enterprise linux 6.0 • redhat enterprise linux 7.0 • redhat enterprise linux 8.0 • redhat enterprise mrg 2.0

Related

Weakness · CWE (1)

  • CWE-190 Integer Overflow or Wraparound weakness

References