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Fencer Vulns
high 8.8

CVE-2017-5123 json

Insufficient data validation in waitid allowed an user to escape sandboxes on Linux.

published 2021-11-02 5 y ago modified 2026-06-17 4 mo ago also EUVD-2017-14232

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.7%
EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits
2
Exploit-DB

Summary

Insufficient data validation in waitid allowed an user to escape sandboxes on Linux.

Patch / fix

  • linux linux_kernel 4.13.7
  • linux Debian 14, Debian 13, Debian 12 4.13.4-2

debian advisories DEBIAN-CVE-2017-5123

  • kernel-source openSUSE Tumbleweed 5.14.6-1.4
  • kernel-source openSUSE Tumbleweed 6.6.17-1.1

opensuse advisories openSUSE-SU-2024:10728-1openSUSE-SU-2024:13704-1

  • linux Arch Linux 4.13.7-1
  • linux-zen Arch Linux 4.13.7-1
  • linux-hardened Arch Linux 4.13.7.a-1

arch linux advisories AVG-444AVG-445AVG-446

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-5123 updated cvss 7.8

kernel: Missing access_ok() checks in waitid()

  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-43029)
  2. Published

Exploit prediction

3.74% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-43127 Linux Kernel 4.13 (Ubuntu 17.10) - 'waitid()' SMEP/SMAP/Chrome Sandbox Privilege Escalation local, 2017-11-06
  • EDB-43029 Linux Kernel 4.14.0-rc4+ - 'waitid()' Local Privilege Escalation local, 2017-10-22

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.