CVE-2022-1587Network attack vector

Memory disclosure or crashes via duplicate JIT transfers

Published May 16, 2022 · Updated Aug 3, 2024

Out-of-bounds read in PCRE2 Project PCRE2 before 10.40 allows attackers to disclose process memory via crafted JIT regexes. get_recurse_data_length() counts the same private-data offsets repeatedly while sizing recursion state, allowing later duplicate transfers to read beyond the allocated area. Reachability requires an embedding application to enable JIT and compile an attacker-controlled recursive pattern; the host process can disclose memory or crash.

CVSS severity9.1
Critical
EPSS probability2.77%
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 read in PCRE2 Project PCRE2 before 10.40 allows attackers to disclose process memory via crafted JIT regexes. get_recurse_data_length() counts the same private-data offsets repeatedly while sizing recursion state, allowing later duplicate transfers to read beyond the allocated area. Reachability requires an embedding application to enable JIT and compile an attacker-controlled recursive pattern; the host process can disclose memory or crash.

The record

CVE
CVE-2022-1587
Published
May 16, 2022
Updated
Aug 3, 2024
Vendor
PCRE2 Project
Product
PCRE2
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Fixed in pcre2-10.40.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PCRE2 Project · PCRE2version=Fixed in pcre2-10.40.

Published CVSS scores

6.4NVDAV:N/AC:L/Au:N/C:P/I:N/A:P
9.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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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