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NVD / CVE Program· CNA redhat

CVE-2026-10649: Pacemaker: pacemaker: denial of service via integer overflow in remote message decompression

Noroxi assessment

Priority: Monitor (action score 34/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.56% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: pacemaker (AlmaLinux:10) 3.0.1-5.el10_2.1; pacemaker-cli (AlmaLinux:10) 3.0.1-5.el10_2.1; pacemaker-cluster-libs (AlmaLinux:10) 3.0.1-5.el10_2.1.

Low priority for now. Upgrade to pacemaker (AlmaLinux:10) 3.0.1-5.el10_2.1; pacemaker-cli (AlmaLinux:10) 3.0.1-5.el10_2.1; pacemaker-cluster-libs (AlmaLinux:10) 3.0.1-5.el10_2.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in Pacemaker. An unauthenticated remote attacker can exploit an integer overflow vulnerability in the remote message decompression process. By sending a specially crafted compressed remote message before authentication, an attacker can cause memory corruption, leading to a denial of service (DoS) in the CIB remote listener. This can result in the affected service crashing.

HighCVSS 8.6 · v3.1—No exploit Fix available
Published
Jun 16, 2026
Updated
Nov 4, 2026
EPSS
0.5% · 46th percentile

Report tools

JSON

Action score

34

Monitor

Low priority for now.

CVSS
34 / 40 · 8.6 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
8.6
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
enterprise linux10.2
enterprise linux eus10.0
enterprise linux7
enterprise linux8
rhel aus8.4
rhel eus long life8.4
rhel aus8.6
rhel eus long life8.6
rhel tus8.8
rhel e4s8.8
enterprise linux9
rhel e4s9.2

and 4 more

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Enterprise Linux 10

    • 0:3.0.1-5.el10_2.1 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support

    • 0:3.0.0-5.3.el10_0 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support

    • 0:1.1.23-1.el7_9.2 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8

    • 0:2.1.7-5.6.el8_10 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

    • 0:2.0.5-9.el8_4.12 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

    • 0:2.0.5-9.el8_4.12 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

    • 0:2.1.2-4.el8_6.11 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

    • 0:2.1.2-4.el8_6.11 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service

    • 0:2.1.5-9.7.el8_8 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

    • 0:2.1.5-9.7.el8_8 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 9

    • 0:2.1.10-3.el9_8 and laternot affected · rpm

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10pacemakerbefore 3.0.1-5.el10_2.13.0.1-5.el10_2.1
AlmaLinux:10pacemaker-clibefore 3.0.1-5.el10_2.13.0.1-5.el10_2.1
AlmaLinux:10pacemaker-cluster-libsbefore 3.0.1-5.el10_2.13.0.1-5.el10_2.1
AlmaLinux:10pacemaker-ctsbefore 3.0.1-5.el10_2.13.0.1-5.el10_2.1
AlmaLinux:10pacemaker-docbefore 3.0.1-5.el10_2.13.0.1-5.el10_2.1
AlmaLinux:10pacemaker-libsbefore 3.0.1-5.el10_2.13.0.1-5.el10_2.1
AlmaLinux:10pacemaker-libs-develbefore 3.0.1-5.el10_2.13.0.1-5.el10_2.1
AlmaLinux:10pacemaker-remotebefore 3.0.1-5.el10_2.13.0.1-5.el10_2.1
AlmaLinux:10pacemaker-schemasbefore 3.0.1-5.el10_2.13.0.1-5.el10_2.1
AlmaLinux:10python3-pacemakerbefore 3.0.1-5.el10_2.13.0.1-5.el10_2.1
AlmaLinux:8pacemakerbefore 2.1.7-5.6.el8_102.1.7-5.6.el8_10
AlmaLinux:8pacemaker-clibefore 2.1.7-5.6.el8_102.1.7-5.6.el8_10
AlmaLinux:8pacemaker-cluster-libsbefore 2.1.7-5.6.el8_102.1.7-5.6.el8_10
AlmaLinux:8pacemaker-ctsbefore 2.1.7-5.6.el8_102.1.7-5.6.el8_10
AlmaLinux:8pacemaker-docbefore 2.1.7-5.6.el8_102.1.7-5.6.el8_10
AlmaLinux:8pacemaker-libsbefore 2.1.7-5.6.el8_102.1.7-5.6.el8_10
AlmaLinux:8pacemaker-libs-develbefore 2.1.7-5.6.el8_102.1.7-5.6.el8_10
AlmaLinux:8pacemaker-nagios-plugins-metadatabefore 2.1.7-5.6.el8_102.1.7-5.6.el8_10
AlmaLinux:8pacemaker-remotebefore 2.1.7-5.6.el8_102.1.7-5.6.el8_10
AlmaLinux:8pacemaker-schemasbefore 2.1.7-5.6.el8_102.1.7-5.6.el8_10
AlmaLinux:8python3-pacemakerbefore 2.1.7-5.6.el8_102.1.7-5.6.el8_10
AlmaLinux:9pacemakerbefore 2.1.10-3.el9_82.1.10-3.el9_8
AlmaLinux:9pacemaker-clibefore 2.1.10-3.el9_82.1.10-3.el9_8
AlmaLinux:9pacemaker-cluster-libsbefore 2.1.10-3.el9_82.1.10-3.el9_8

+96

Same product

red hat: all records

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Published before and after this one in the same product

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  • ← EarlierCVE-2026-42014Jun 16, 2026 · Gnutls: gnutls: use-after-free in gnutls_pkcs11_token_set_pin
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  • Later →CVE-2026-12505Jun 18, 2026 · Cifs-utils: local privilege escalation via forged cifs.spnego key description in cifs.upcall
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:pacemaker2.1.7-5.6.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:pacemaker-cli2.1.7-5.6.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:pacemaker-cluster-libs2.1.7-5.6.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:pacemaker-cts2.1.7-5.6.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:pacemaker-doc2.1.7-5.6.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:pacemaker-libs2.1.7-5.6.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:pacemaker-libs-devel2.1.7-5.6.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:pacemaker-nagios-plugins-metadata2.1.7-5.6.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:pacemaker-remote2.1.7-5.6.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:pacemaker-schemas2.1.7-5.6.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:python3-pacemaker2.1.7-5.6.el8_10 · AlmaLinux:8Package registry (OSV)
opensuse:pacemaker3.0.2+20260616.4544f351-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:pacemaker0:2.1.7-5.6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:pacemaker-cli0:2.1.7-5.6.el8_10 · Red Hat:enterprise_linux:8::highavailabilityPackage registry (OSV)
red hat:pacemaker-cli-debuginfo0:2.1.7-5.6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:pacemaker-cluster-libs0:2.1.7-5.6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:pacemaker-cluster-libs-debuginfo0:2.1.7-5.6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:pacemaker-cts0:2.1.7-5.6.el8_10 · Red Hat:enterprise_linux:8::highavailabilityPackage registry (OSV)
red hat:pacemaker-debuginfo0:2.1.7-5.6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:pacemaker-debugsource0:2.1.7-5.6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:pacemaker-libs0:2.1.7-5.6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:pacemaker-libs-debuginfo0:2.1.7-5.6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:pacemaker-remote-debuginfo0:2.1.7-5.6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:pacemaker-schemas0:2.1.7-5.6.el8_10 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
rocky linux:pacemaker0:2.1.7-5.6.el8_10 · Rocky Linux:8Package registry (OSV)
suse:pacemaker3.0.0+20250218.64cd85422c-160000.4.1 · SUSE:Linux Enterprise High Availability Extension 16.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-1011815 days apartPoppler: integer overflow in poppler splashoutputdev::tilingpatternfill leads to heap buffer overflow via unchecked dimension multiplication
    31Monitor
  • CVE-2026-537051 days apartGstreamer1-plugins-good: gstreamer: heap buffer overflow in wavpack decoder via integer overflow
    30Monitor
  • CVE-2026-1652944 days apartPcp: pcp: denial of service due to signed integer overflow
    30Monitor
  • CVE-2026-527221 days apartGstreamer1-plugins-bad-free: gstreamer: signed integer overflow in vmnc decoder cursor payload handling
    28Monitor
  • CVE-2026-1938955 days apartGstreamer: gstreamer1-plugins-ugly-free: gstreamer: integer overflow/underflow in asfdemux bounds checks leading to out-of-bounds read
    28Monitor
  • CVE-2026-62439122 days apartGimp: gimp: file-pvr plug-in pvr file parsing integer overflow heap-based buffer overflow vulnerability
    28Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
High

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (15 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records