p PatchFirst

CVE-2021-3997

CVE-2021-3997

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service at boot time when too many nested directories are created in /tmp.

CVSS 5.5 · Medium · EPSS 1.7% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • systemd

    Versions
    • Fixed in v251-rc1: Affected

    No fix published

  • systemd Debian:12

    Affected ranges
    • ECOSYSTEM: < 250.2-1

    Update to 250.2-1

  • systemd Debian:13

    Affected ranges
    • ECOSYSTEM: < 250.2-1

    Update to 250.2-1

  • systemd Debian:14

    Affected ranges
    • ECOSYSTEM: < 250.2-1

    Update to 250.2-1

  • systemd Ubuntu:Pro:14.04:LTS

    Versions
    • 204-0ubuntu18
    • 204-0ubuntu19
    • 204-5ubuntu3
    • 204-5ubuntu5
    • 204-5ubuntu6
    • 204-5ubuntu7
    • 204-5ubuntu8
    • 204-5ubuntu9
    • 204-5ubuntu10
    • 204-5ubuntu11
    • 204-5ubuntu13
    • 204-5ubuntu14
    • 204-5ubuntu15
    • 204-5ubuntu16
    • 204-5ubuntu17
    • 204-5ubuntu18
    • 204-5ubuntu19
    • 204-5ubuntu20
    • 204-5ubuntu20.2
    • 204-5ubuntu20.3
    • 204-5ubuntu20.4
    • 204-5ubuntu20.5
    • 204-5ubuntu20.6
    • 204-5ubuntu20.7
    • 204-5ubuntu20.8
    • 204-5ubuntu20.9
    • 204-5ubuntu20.10
    • 204-5ubuntu20.11
    • 204-5ubuntu20.12
    • 204-5ubuntu20.13
    • 204-5ubuntu20.14
    • 204-5ubuntu20.15
    • 204-5ubuntu20.18
    • 204-5ubuntu20.19
    • 204-5ubuntu20.20
    • 204-5ubuntu20.21
    • 204-5ubuntu20.22
    • 204-5ubuntu20.24
    • 204-5ubuntu20.25
    • 204-5ubuntu20.26
    • 204-5ubuntu20.28
    • 204-5ubuntu20.29
    • 204-5ubuntu20.31
    • 204-5ubuntu20.31+esm2
    • 204-5ubuntu20.31+esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • systemd Ubuntu:Pro:16.04:LTS

    Versions
    • 225-1ubuntu9
    • 227-2ubuntu1
    • 227-2ubuntu2
    • 228-1ubuntu2
    • 228-2ubuntu1
    • 228-2ubuntu2
    • 228-3ubuntu1
    • 228-4ubuntu1
    • 228-4ubuntu2
    • 228-5ubuntu1
    • 228-5ubuntu2
    • 228-5ubuntu3
    • 228-6ubuntu1
    • 229-1ubuntu2
    • 229-1ubuntu4
    • 229-2ubuntu1
    • 229-3ubuntu1
    • 229-3ubuntu2
    • 229-4ubuntu1
    • 229-4ubuntu4
    • 229-4ubuntu5
    • 229-4ubuntu6
    • 229-4ubuntu7
    • 229-4ubuntu8
    • 229-4ubuntu10
    • 229-4ubuntu11
    • 229-4ubuntu12
    • 229-4ubuntu13
    • 229-4ubuntu16
    • 229-4ubuntu17
    • 229-4ubuntu19
    • 229-4ubuntu20
    • 229-4ubuntu21
    • 229-4ubuntu21.1
    • 229-4ubuntu21.2
    • 229-4ubuntu21.3
    • 229-4ubuntu21.4
    • 229-4ubuntu21.5
    • 229-4ubuntu21.6
    • 229-4ubuntu21.8
    • 229-4ubuntu21.9
    • 229-4ubuntu21.10
    • 229-4ubuntu21.15
    • 229-4ubuntu21.16
    • 229-4ubuntu21.17
    • 229-4ubuntu21.19
    • 229-4ubuntu21.21
    • 229-4ubuntu21.22
    • 229-4ubuntu21.23
    • 229-4ubuntu21.27
    • 229-4ubuntu21.28
    • 229-4ubuntu21.29
    • 229-4ubuntu21.31
    • 229-4ubuntu21.31+esm1
    • 229-4ubuntu21.31+esm3
    • 229-4ubuntu21.31+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • systemd Ubuntu:Pro:18.04:LTS

    Versions
    • 234-2ubuntu12
    • 235-2ubuntu3
    • 235-3ubuntu2
    • 235-3ubuntu3
    • 237-3ubuntu3
    • 237-3ubuntu4
    • 237-3ubuntu6
    • 237-3ubuntu7
    • 237-3ubuntu8
    • 237-3ubuntu10
    • 237-3ubuntu10.2
    • 237-3ubuntu10.3
    • 237-3ubuntu10.4
    • 237-3ubuntu10.6
    • 237-3ubuntu10.9
    • 237-3ubuntu10.11
    • 237-3ubuntu10.12
    • 237-3ubuntu10.13
    • 237-3ubuntu10.15
    • 237-3ubuntu10.17
    • 237-3ubuntu10.19
    • 237-3ubuntu10.20
    • 237-3ubuntu10.21
    • 237-3ubuntu10.22
    • 237-3ubuntu10.23
    • 237-3ubuntu10.24
    • 237-3ubuntu10.25
    • 237-3ubuntu10.26
    • 237-3ubuntu10.28
    • 237-3ubuntu10.29
    • 237-3ubuntu10.31
    • 237-3ubuntu10.33
    • 237-3ubuntu10.38
    • 237-3ubuntu10.39
    • 237-3ubuntu10.40
    • 237-3ubuntu10.41
    • 237-3ubuntu10.42
    • 237-3ubuntu10.43
    • 237-3ubuntu10.44
    • 237-3ubuntu10.45
    • 237-3ubuntu10.46
    • 237-3ubuntu10.47
    • 237-3ubuntu10.48
    • 237-3ubuntu10.49
    • 237-3ubuntu10.50
    • 237-3ubuntu10.51
    • 237-3ubuntu10.52
    • 237-3ubuntu10.53
    • 237-3ubuntu10.54
    • 237-3ubuntu10.56
    • 237-3ubuntu10.57
    • 237-3ubuntu10.57+esm2
    • 237-3ubuntu10.57+esm3
    • 237-3ubuntu10.57+esm4
    • 237-3ubuntu10.57+esm5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • systemd Ubuntu:20.04:LTS

    Versions
    • 242-7ubuntu3
    • 243-2ubuntu1
    • 243-3ubuntu1
    • 244-3ubuntu1
    • 244.1-0ubuntu2
    • 244.1-0ubuntu3
    • 244.2-1ubuntu1
    • 244.3-1ubuntu1
    • 245.2-1ubuntu1
    • 245.2-1ubuntu2
    • 245.4-2ubuntu1
    • 245.4-4ubuntu1
    • 245.4-4ubuntu3
    • 245.4-4ubuntu3.1
    • 245.4-4ubuntu3.2
    • 245.4-4ubuntu3.3
    • 245.4-4ubuntu3.4
    • 245.4-4ubuntu3.5
    • 245.4-4ubuntu3.6
    • 245.4-4ubuntu3.7
    • 245.4-4ubuntu3.10
    • 245.4-4ubuntu3.11
    • 245.4-4ubuntu3.13
    • 245.4-4ubuntu3.14
    Affected ranges
    • ECOSYSTEM: < 245.4-4ubuntu3.15

    Update to 245.4-4ubuntu3.15

Original sources

Check your server →