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TI-2020-17762 Aliases CVE-2020-29573GHSA-x6gp-hg9r-wh46

sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86…

Priority LOW 38CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 24 fixed, 2 without a fix

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

Summary

sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \x00\x04\x00\x00\x00\x00\x00\x00\x00\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of "Fixed for glibc 2.33" in the 26649 reference.

Why it matters now

EPSS 0.02723 86th percentileScored 2026-11-07
Fix Partial Red Hat: 5 advisoriesRed Hat: 24 fixed, 2 without a fix

SSVC decision points

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

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:gnu:glibc:*:*:*:*:*:*:x86:*before 2.23VulnerableGNU
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
  • cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:x86:* Versions before 2.23 Vulnerable ·GNU
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp

Remediation

Red Hat 5 advisories

  • RHSA-2021:3315 Released 2021-08-31 · Red Hat rating Moderate
    glibc security and bug fix update
    • Red Hat Enterprise Linux Server AUS (v. 7.6) glibc-2.17-260.el7_6.9, glibc-common-2.17-260.el7_6.9, glibc-devel-2.17-260.el7_6.9 +3
    • Red Hat Enterprise Linux Server E4S (v. 7.6) glibc-2.17-260.el7_6.9, glibc-common-2.17-260.el7_6.9, glibc-devel-2.17-260.el7_6.9 +3
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.6) glibc-static-2.17-260.el7_6.9
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.6) glibc-static-2.17-260.el7_6.9
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.6) glibc-static-2.17-260.el7_6.9
    • Red Hat Enterprise Linux Server TUS (v. 7.6) glibc-2.17-260.el7_6.9, glibc-common-2.17-260.el7_6.9, glibc-devel-2.17-260.el7_6.9 +3
  • RHSA-2021:2998 Released 2021-08-03 · Red Hat rating Moderate
    glibc security update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) glibc-2.17-292.el7_7.2, glibc-common-2.17-292.el7_7.2, glibc-devel-2.17-292.el7_7.2 +3
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) glibc-static-2.17-292.el7_7.2
    • Red Hat Enterprise Linux Server EUS (v. 7.7) glibc-2.17-292.el7_7.2, glibc-2.17-292.el7_7.2.ppc, glibc-common-2.17-292.el7_7.2 +5
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) glibc-static-2.17-292.el7_7.2, glibc-static-2.17-292.el7_7.2.ppc
  • RHSA-2021:2813 Released 2021-07-20 · Red Hat rating Moderate
    glibc security update
    • Red Hat Enterprise Linux Server AUS (v. 7.4) glibc-2.17-196.el7_4.4, glibc-common-2.17-196.el7_4.4, glibc-devel-2.17-196.el7_4.4 +3
    • Red Hat Enterprise Linux Server E4S (v. 7.4) glibc-2.17-196.el7_4.4, glibc-common-2.17-196.el7_4.4, glibc-devel-2.17-196.el7_4.4 +3
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) glibc-static-2.17-196.el7_4.4
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.4) glibc-static-2.17-196.el7_4.4
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) glibc-static-2.17-196.el7_4.4
    • Red Hat Enterprise Linux Server TUS (v. 7.4) glibc-2.17-196.el7_4.4, glibc-common-2.17-196.el7_4.4, glibc-devel-2.17-196.el7_4.4 +3
Show 2 more Red Hat advisories
  • RHSA-2021:0949 Released 2021-03-22 · Red Hat rating Low
    Red Hat OpenShift Do openshift/odo-init-image 1.1.3 security update
    • OpenShift Do 1 openshiftdo/odo-init-image-rhel7
  • RHSA-2021:0348 Released 2021-02-02 · Red Hat rating Moderate
    glibc security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) glibc-2.17-322.el7_9, glibc-common-2.17-322.el7_9, glibc-devel-2.17-322.el7_9 +3
    • Red Hat Enterprise Linux Client Optional (v. 7) glibc-static-2.17-322.el7_9
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) glibc-static-2.17-322.el7_9
    • Red Hat Enterprise Linux Server (v. 7) glibc-2.17-322.el7_9, glibc-2.17-322.el7_9.ppc, glibc-common-2.17-322.el7_9 +5
    • Red Hat Enterprise Linux Server Optional (v. 7) glibc-static-2.17-322.el7_9, glibc-static-2.17-322.el7_9.ppc
    • Red Hat Enterprise Linux Workstation (v. 7) glibc-2.17-322.el7_9, glibc-common-2.17-322.el7_9, glibc-devel-2.17-322.el7_9 +3
    • Red Hat Enterprise Linux Workstation Optional (v. 7) glibc-static-2.17-322.el7_9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
OpenShift Do 1Fixed RHSA-2021:0949
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2021:0348
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2021:0348
Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)Fixed RHSA-2021:2998
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2021:0348
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7)Fixed RHSA-2021:2998
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2021:0348
Red Hat Enterprise Linux Server AUS (v. 7.4)Fixed RHSA-2021:2813
Red Hat Enterprise Linux Server AUS (v. 7.6)Fixed RHSA-2021:3315
Red Hat Enterprise Linux Server E4S (v. 7.4)Fixed RHSA-2021:2813
Red Hat Enterprise Linux Server E4S (v. 7.6)Fixed RHSA-2021:3315
Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2021:2998
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2021:0348
Red Hat Enterprise Linux Server Optional AUS (v. 7.4)Fixed RHSA-2021:2813
Red Hat Enterprise Linux Server Optional AUS (v. 7.6)Fixed RHSA-2021:3315
Red Hat Enterprise Linux Server Optional E4S (v. 7.4)Fixed RHSA-2021:2813
Red Hat Enterprise Linux Server Optional E4S (v. 7.6)Fixed RHSA-2021:3315
Red Hat Enterprise Linux Server Optional EUS (v. 7.7)Fixed RHSA-2021:2998
Red Hat Enterprise Linux Server Optional TUS (v. 7.4)Fixed RHSA-2021:2813
Red Hat Enterprise Linux Server Optional TUS (v. 7.6)Fixed RHSA-2021:3315
Red Hat Enterprise Linux Server TUS (v. 7.4)Fixed RHSA-2021:2813
Red Hat Enterprise Linux Server TUS (v. 7.6)Fixed RHSA-2021:3315
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2021:0348
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2021:0348
Not affected: 2 products
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-29573
  2. 2026-10-03 Alias added: GHSA-x6gp-hg9r-wh46

References

Patch 2

Advisory 2

Sources

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