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TI-2020-11250 Aliases CVE-2020-14382GHSA-v8mw-xqhr-2vqp

Out-of-bounds write in cryptsetup

Priority LOW 36CWE-787Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

A vulnerability was found in upstream release cryptsetup-2.2.0 where, there's a bug in LUKS2 format validation code, that is effectively invoked on every device/image presenting itself as LUKS2 container. The bug is in segments validation code in file 'lib/luks2/luks2_json_metadata.c' in function hdr_validate_segments(struct crypt_device *cd, json_object *hdr_jobj) where the code does not check for possible overflow on memory allocation used for intervals array (see statement "intervals = malloc(first_backup * sizeof(*intervals));"). Due to the bug, library can be *tricked* to expect such allocation was successful but for far less memory then originally expected. Later it may read data FROM image crafted by an attacker and actually write such data BEYOND allocated memory.

Why it matters now

EPSS 0.01157 67th percentileScored 2026-11-07
Fix Fixed Red Hat: 3 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—cryptsetupcryptsetup-2.2.0—No fix listedCNA
  • cryptsetup Vendor— Affected cryptsetup-2.2.0 Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:cryptsetup_project:cryptsetup:2.2.0:-:*:*:*:*:*:*2.2.0VulnerableCryptsetup Project
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*8.0VulnerableRed Hat
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*20.04VulnerableCanonical
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*31VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
  • cpe:2.3:a:cryptsetup_project:cryptsetup:2.2.0:-:*:*:*:*:*:* Versions 2.2.0 Vulnerable ·Cryptsetup Project
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* Versions 20.04 Vulnerable ·Canonical
  • cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject

Remediation

Red Hat 3 advisories

  • RHSA-2021:0258 Released 2021-01-26 · Red Hat rating Moderate
    cryptsetup security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) cryptsetup-devel-2.2.2-1.el8_2.1
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) cryptsetup-2.2.2-1.el8_2.1, cryptsetup-libs-2.2.2-1.el8_2.1, cryptsetup-reencrypt-2.2.2-1.el8_2.1 +2
  • RHSA-2020:4900 Released 2020-11-04 · Red Hat rating Moderate
    cryptsetup security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.1) cryptsetup-devel-2.2.0-2.el8_1.1
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) cryptsetup-2.2.0-2.el8_1.1, cryptsetup-libs-2.2.0-2.el8_1.1, cryptsetup-reencrypt-2.2.0-2.el8_1.1 +2
  • RHSA-2020:4542 Released 2020-11-04 · Red Hat rating Moderate
    cryptsetup security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) cryptsetup-devel-2.3.3-2.el8
    • Red Hat Enterprise Linux BaseOS (v. 8) cryptsetup-2.3.3-2.el8, cryptsetup-libs-2.3.3-2.el8, cryptsetup-reencrypt-2.3.3-2.el8 +2

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2020:4542
Red Hat Enterprise Linux AppStream EUS (v. 8.1)Fixed RHSA-2020:4900
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2021:0258
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2020:4542
Red Hat Enterprise Linux BaseOS EUS (v. 8.1)Fixed RHSA-2020:4900
Red Hat Enterprise Linux BaseOS EUS (v. 8.2)Fixed RHSA-2021:0258
Not affected: 1 product
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-14382
  2. 2026-10-03 Alias added: GHSA-v8mw-xqhr-2vqp

References

Patch 1

Advisory 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences