Vulnerability-Lookup

ALSA-2026:81522

Vulnerability from osv_almalinux – Published: 2026-10-12 00:00 – Updated: 2026-10-13 10:30 – Source website

Summary

Important: pcre2 security update

Details

The pcre2 package contains a new generation of the Perl Compatible Regular Expression libraries for implementing regular expression pattern matching using the same syntax and semantics as Perl.

Security Fix(es):

pcre2: PCRE2: Out-of-bounds write allows arbitrary code execution via crafted regular expressions (CVE-2026-86145)
PCRE2: PCRE2: Out-of-bounds read via invalid UTF data during JIT fallback (CVE-2026-89156)
pcre2: PCRE2: Out-of-bounds write via large pattern input (CVE-2026-89157)
pcre2: PCRE2: Denial of Service via out-of-bounds read during invalid UTF matching (CVE-2026-89160)
PCRE2: PCRE2: Out-of-bounds write via integer overflow on 32-bit platforms (CVE-2026-89158)
pcre2: PCRE2: Memory corruption vulnerability in pcre2_jit_match (CVE-2026-89161)
pcre2: pcre2: Out-of-bounds write via crafted regular expression (CVE-2026-103111)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:81522	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-103111	REPORT
	https://access.redhat.com/security/cve/CVE-2026-86145	REPORT
	https://access.redhat.com/security/cve/CVE-2026-89156	REPORT
	https://access.redhat.com/security/cve/CVE-2026-89157	REPORT
	https://access.redhat.com/security/cve/CVE-2026-89158	REPORT
	https://access.redhat.com/security/cve/CVE-2026-89160	REPORT
	https://access.redhat.com/security/cve/CVE-2026-89161	REPORT
	https://bugzilla.redhat.com/2528993	REPORT
	https://bugzilla.redhat.com/2531743	REPORT
	https://bugzilla.redhat.com/2531744	REPORT
	https://bugzilla.redhat.com/2531745	REPORT
	https://bugzilla.redhat.com/2531746	REPORT
	https://bugzilla.redhat.com/2531747	REPORT
	https://bugzilla.redhat.com/2543797	REPORT
	https://errata.almalinux.org/10/ALSA-2026-81522.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "pcre2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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  ],
  "details": "The pcre2 package contains a new generation of the Perl Compatible Regular Expression libraries for implementing regular expression pattern matching using the same syntax and semantics as Perl.   \n\nSecurity Fix(es):  \n\n  * pcre2: PCRE2: Out-of-bounds write allows arbitrary code execution via crafted regular expressions (CVE-2026-86145)\n  * PCRE2: PCRE2: Out-of-bounds read via invalid UTF data during JIT fallback (CVE-2026-89156)\n  * pcre2: PCRE2: Out-of-bounds write via large pattern input (CVE-2026-89157)\n  * pcre2: PCRE2: Denial of Service via out-of-bounds read during invalid UTF matching (CVE-2026-89160)\n  * PCRE2: PCRE2: Out-of-bounds write via integer overflow on 32-bit platforms (CVE-2026-89158)\n  * pcre2: PCRE2: Memory corruption vulnerability in pcre2_jit_match (CVE-2026-89161)\n  * pcre2: pcre2: Out-of-bounds write via crafted regular expression (CVE-2026-103111)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:81522",
  "modified": "2026-10-13T10:30:10Z",
  "published": "2026-10-12T00:00:00Z",
  "references": [
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      "type": "ADVISORY",
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    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-103111"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-86145"
    },
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      "url": "https://access.redhat.com/security/cve/CVE-2026-89156"
    },
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      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-89157"
    },
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      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-89158"
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      "type": "REPORT",
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      "url": "https://access.redhat.com/security/cve/CVE-2026-89161"
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}

CVE-2026-103111 (GCVE-0-2026-103111)

Vulnerability from cvelistv5 – Published: 2026-09-30 04:13 – Updated: 2026-10-03 23:51

Summary

PCRE2 before 10.49, when there is an attacker-controlled regular expression and certain JIT API usage, allows an out-of-bounds write with arbitrary data.

Severity

7.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 18:44 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

mitre CNA under the mitre root

CNA scorecard E 27/100 over 2307 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/PCRE2Project/pcre2/security/ad…
https://lists.debian.org/debian-lts-announce/2026…

Impacted products

1 product

Vendor	Product	Version
PCRE	PCRE2	Affected: 0 , < 10.49 (custom) cpe:2.3:a:pcre:pcre2::::::::

Show details on NVD website

JSON

To clipboard

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CVE-2026-86145 (GCVE-0-2026-86145)

Vulnerability from cvelistv5 – Published: 2026-09-05 05:09 – Updated: 2026-09-08 18:07

Summary

PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).

Severity

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 18:07 UTC

CWE

CWE-424 - Improper Protection of Alternate Path

Assigner

mitre CNA under the mitre root

CNA scorecard E 27/100 over 2307 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/PCRE2Project/pcre2/security/ad…
https://github.com/PCRE2Project/pcre2/releases/ta…
http://www.openwall.com/lists/oss-security/2026/09/05/3

Impacted products

1 product

Vendor	Product	Version
PCRE	PCRE2	Affected: 10.32 , < 10.48 (custom) cpe:2.3:a:pcre:pcre2::::::::

Show details on NVD website

JSON

To clipboard

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CVE-2026-89156 (GCVE-0-2026-89156)

Vulnerability from cvelistv5 – Published: 2026-09-11 04:03 – Updated: 2026-09-14 18:18

Summary

PCRE2 before 10.48 has a pcre2_match out-of-bounds read after a JIT fallback when an attacker can provide invalid UTF data.

Severity

2.9 (Low)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 14:57 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

mitre CNA under the mitre root

CNA scorecard E 27/100 over 2307 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/PCRE2Project/pcre2/releases/ta…
https://github.com/PCRE2Project/pcre2/security/ad…

Impacted products

1 product

Vendor	Product	Version
PCRE	PCRE2	Affected: 10.34 , < 10.48 (custom) cpe:2.3:a:pcre:pcre2::::::::

Show details on NVD website

JSON

To clipboard

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CVE-2026-89157 (GCVE-0-2026-89157)

Vulnerability from cvelistv5 – Published: 2026-09-11 04:05 – Updated: 2026-09-11 16:02

Summary

PCRE2 before 10.48, on 32-bit platforms, has a pcre2_pattern_convert out-of-bounds write when an attacker can provide a large pattern.

Severity

5.7 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-11 16:02 UTC

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre CNA under the mitre root

CNA scorecard E 27/100 over 2307 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/PCRE2Project/pcre2/releases/ta…
https://github.com/PCRE2Project/pcre2/security/ad…

Impacted products

1 product

Vendor	Product	Version
PCRE	PCRE2	Affected: 10.30 , < 10.48 (custom) cpe:2.3:a:pcre:pcre2::::::::

Show details on NVD website

JSON

To clipboard

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CVE-2026-89158 (GCVE-0-2026-89158)

Vulnerability from cvelistv5 – Published: 2026-09-11 04:07 – Updated: 2026-09-11 14:09

Summary

PCRE2 before 10.48, on 32-bit platforms, has a pcre2_compile_32 integer overflow and resultant out-of-bounds write.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-11 14:09 UTC

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

mitre CNA under the mitre root

CNA scorecard E 27/100 over 2307 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/PCRE2Project/pcre2/releases/ta…
https://github.com/PCRE2Project/pcre2/security/ad…

Impacted products

1 product

Vendor	Product	Version
PCRE	PCRE2	Affected: 0 , < 10.48 (custom) cpe:2.3:a:pcre:pcre2::::::::

Show details on NVD website

JSON

To clipboard

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CVE-2026-89160 (GCVE-0-2026-89160)

Vulnerability from cvelistv5 – Published: 2026-09-11 04:09 – Updated: 2026-09-15 15:37

Summary

PCRE2 before 10.48 has a pcre2_match out-of-bounds read during the PCRE2_MATCH_INVALID_UTF matching of an invalid UTF subject.

Severity

3.7 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 15:37 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

mitre CNA under the mitre root

CNA scorecard E 27/100 over 2307 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/PCRE2Project/pcre2/releases/ta…
https://github.com/PCRE2Project/pcre2/security/ad…

Impacted products

1 product

Vendor	Product	Version
PCRE	PCRE2	Affected: 10.34 , < 10.48 (custom) cpe:2.3:a:pcre:pcre2::::::::

Show details on NVD website

JSON

To clipboard

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CVE-2026-89161 (GCVE-0-2026-89161)

Vulnerability from cvelistv5 – Published: 2026-09-11 04:11 – Updated: 2026-09-11 19:59

Summary

In PCRE2 before 10.48, pcre2_jit_match mishandles a previously copied subject being passed in as a context. An incorrect free operation can occur.

Severity

7.4 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-11 19:59 UTC

CWE

CWE-590 - Free of Memory not on the Heap

Assigner

mitre CNA under the mitre root

CNA scorecard E 27/100 over 2307 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/PCRE2Project/pcre2/releases/ta…
https://github.com/PCRE2Project/pcre2/pull/937

Impacted products

1 product

Vendor	Product	Version
PCRE	PCRE2	Affected: 0 , < 10.48 (custom) cpe:2.3:a:pcre:pcre2::::::::

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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CVE-2026-89161 (GCVE-0-2026-89161)

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