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TI-2022-20908 Aliases CVE-2022-42919GHSA-hrxf-3584-q6p6

Python 3.9.x before 3.9.16 and 3.10.x before 3.10.9 on Linux allows local privilege…

Priority LOW 37CWE-502Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-502.

Summary

Python 3.9.x before 3.9.16 and 3.10.x before 3.10.9 on Linux allows local privilege escalation in a non-default configuration. The Python multiprocessing library, when used with the forkserver start method on Linux, allows pickles to be deserialized from any user in the same machine local network namespace, which in many system configurations means any user on the same machine. Pickles can execute arbitrary code. Thus, this allows for local user privilege escalation to the user that any forkserver process is running as. Setting multiprocessing.util.abstract_sockets_supported to False is a workaround. The forkserver start method for multiprocessing is not the default start method. This issue is Linux specific because only Linux supports abstract namespace sockets. CPython before 3.9 does not make use of Linux abstract namespace sockets by default. Support for users manually specifying an abstract namespace socket was added as a bugfix in 3.7.8 and 3.8.3, but users would need to make specific uncommon API calls in order to do that in CPython before 3.9.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00802 56th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*3.7.3 – 3.7.15; 3.8.3 – 3.8.15; 3.9.0 to before 3.9.16; 3.10.0 to before 3.10.9Vulnerablepython-pillow
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*35VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*36VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*37VulnerableFedoraproject
  • cpe:2.3:a:python:python:*:*:*:*:*:*:*:* Versions 3.7.3 – 3.7.15; 3.8.3 – 3.8.15; 3.9.0 to before 3.9.16; 3.10.0 to before 3.10.9 Vulnerable ·python-pillow
  • cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject

Remediation

Red Hat 2 advisories

  • RHSA-2022:8493 Released 2022-11-16 · Red Hat rating Important
    python3.9 security update
    • Red Hat CodeReady Linux Builder (v. 9) python3-3.9.14-1.el9_1.1, python3-debug-3.9.14-1.el9_1.1, python3-idle-3.9.14-1.el9_1.1 +2
    • Red Hat CodeReady Linux Builder EUS (v.9.0) python3-3.9.10-4.el9_0, python3-debug-3.9.10-4.el9_0, python3-idle-3.9.10-4.el9_0 +2
    • Red Hat Enterprise Linux AppStream (v. 9) python-unversioned-command-3.9.14-1.el9_1.1, python3-devel-3.9.14-1.el9_1.1, python3-tkinter-3.9.14-1.el9_1.1
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) python-unversioned-command-3.9.10-4.el9_0, python3-devel-3.9.10-4.el9_0, python3-tkinter-3.9.10-4.el9_0
    • Red Hat Enterprise Linux BaseOS (v. 9) python3-3.9.14-1.el9_1.1, python3-libs-3.9.14-1.el9_1.1, python3.9-3.9.14-1.el9_1.1
    • Red Hat Enterprise Linux BaseOS EUS (v.9.0) python3-3.9.10-4.el9_0, python3-libs-3.9.10-4.el9_0, python3.9-3.9.10-4.el9_0
  • RHSA-2022:8492 Released 2022-11-16 · Red Hat rating Important
    python39:3.9 security update
    • Red Hat Enterprise Linux AppStream (v. 8) PyYAML-5.4.1-1.module+el8.5.0+10613+59a13ec4.src::python39:3.9, mod_wsgi-4.7.1-5.module+el8.7.0+16654+645aad7f.src::python39:3.9, numpy-1.19.4-3.module+el8.5.0+12204+54860423.src::python39:3.9 +47
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) PyYAML-5.4.1-1.module+el8.4.0+10484+27ce8e03.src::python39:3.9, mod_wsgi-4.7.1-4.module+el8.4.0+9822+20bf1249.src::python39:3.9, numpy-1.19.4-2.module+el8.4.0+15042+dc5a279b.1.src::python39:3.9 +47
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) PyYAML-5.4.1-1.module+el8.5.0+10613+59a13ec4.src::python39:3.9, mod_wsgi-4.7.1-4.module+el8.4.0+9822+20bf1249.src::python39:3.9, numpy-1.19.4-3.module+el8.5.0+12204+54860423.src::python39:3.9 +47

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder (v. 9)Fixed RHSA-2022:8493
Red Hat CodeReady Linux Builder EUS (v.9.0)Fixed RHSA-2022:8493
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2022:8492
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2022:8493
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2022:8492
Red Hat Enterprise Linux AppStream EUS (v.8.6)Fixed RHSA-2022:8492
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2022:8493
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2022:8493
Red Hat Enterprise Linux BaseOS EUS (v.9.0)Fixed RHSA-2022:8493
Not affected: 5 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat OpenShift Container Platform 4
  • Red Hat Software Collections

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-42919
  2. 2026-10-03 Alias added: GHSA-hrxf-3584-q6p6

References

Advisory 12

Other 2

Sources

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