CVE-2020-1751

Process crash via PowerPC backtrace array overflow

Published Apr 17, 2020 · Updated Aug 4, 2024

Out-of-bounds writes in glibc before 2.31 allow local users on PowerPC systems to crash a process during signal-frame unwinding. PowerPC 32-bit and 64-bit __backtrace increment the frame count and store a recovered instruction address without first ensuring that another array slot exists. Reachability requires unwinding through a signal trampoline; availability loss is the primary threat, and the record identifies code execution as a potential consequence.

CVSS severity5.1
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds writes in glibc before 2.31 allow local users on PowerPC systems to crash a process during signal-frame unwinding. PowerPC 32-bit and 64-bit __backtrace increment the frame count and store a recovered instruction address without first ensuring that another array slot exists. Reachability requires unwinding through a signal trampoline; availability loss is the primary threat, and the record identifies code execution as a potential consequence.

The record

CVE
CVE-2020-1751
Published
Apr 17, 2020
Updated
Aug 4, 2024
Vendor
Red Hat
Product
GNU C Library (glibc)
Classifications
CWE-787
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 17, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=2.31

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Red Hat · GNU C Library (glibc)version=2.31

Published CVSS scores

5.1Red Hat, Inc.CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
7.0NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.9NIST NVDAV:L/AC:M/Au:N/C:P/I:P/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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