VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVPublished CVSS 6.5 mediumEPSS 0.3% probability of exploitation in 30 daysFound by AI: AISLE
Red Hat

CVE-2026-9149: Libsolv: heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?
0.3%

Down from 0.6% on .

EPSS score, percentile 24.1 of all scored records. A probability estimated by FIRST, not a report of exploitation.

CISA's SSVC assessment in the CVE record lists exploitation as poc.

How severe?
6.5 Medium

CVSS v3.1 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (3)

Which versions are affected?

Unaffected 0:0.7.33-5.el10_2; 0:0.7.29-8.el10_0.1; 0.7.38-2.hum1

Versions by product

Source: CISA KEV 2026.10.29, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

What to do

Workaround (from the CVE record)

To mitigate this issue, avoid processing untrusted `.solv` files with libsolv or any applications that consume `.solv` input. Ensure that all `.solv` data processed by the system originates from trusted sources only.

Advisories and patches

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

As listed in the CVE record.

Red Hat Red Hat Enterprise Linux 10
StatusVersions
Unaffected0:0.7.33-5.el10_2

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
StatusVersions
Unaffected0:0.7.29-8.el10_0.1

Versions not listed are: affected.

Red Hat Red Hat Hardened Images
StatusVersions
Unaffected0.7.38-2.hum1

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 7
StatusVersions

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 8
StatusVersions

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 9
StatusVersions

Versions not listed are: affected.

Red Hat Red Hat OpenShift Container Platform 4
StatusVersions

Versions not listed are: affected.

Red Hat Red Hat OpenShift Container Platform 4
StatusVersions

Versions not listed are: affected.

Red Hat Red Hat Satellite 6
StatusVersions

Versions not listed are: affected.

Red Hat Red Hat Update Infrastructure 4 for Cloud Providers
StatusVersions

Versions not listed are: affected.

Versions the record lists as unaffected: 0:0.7.33-5.el10_2, 0:0.7.29-8.el10_0.1, 0.7.38-2.hum1.

Source: CVE List, as of . About the data.

About this vulnerability

A flaw was found in libsolv. This heap buffer overflow vulnerability occurs when a victim processes a specially crafted `.solv` file containing negative size values in the `repo_add_solv` function. This leads to an undersized memory allocation and a subsequent out-of-bounds write. An attacker could exploit this to cause a denial of service (DoS).

Summary: CVE record, as of .

  • CISA has not added CVE-2026-9149 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
  • The CVE record was published on 20 May 2026.
  • The CVE record carries a CVSS v3.1 base score of 6.5 (Medium), given by its CNA.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.3% (percentile 24.1), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
  • CISA's SSVC assessment in the CVE record: exploitation poc, automatable no, technical impact partial.
  • The credits in the CVE record name AISLE as finder.

Source: CISA KEV 2026.10.29, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.

Description

Libsolv: heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file

A flaw was found in libsolv. This heap buffer overflow vulnerability occurs when a victim processes a specially crafted `.solv` file containing negative size values in the `repo_add_solv` function. This leads to an undersized memory allocation and a subsequent out-of-bounds write. An attacker could exploit this to cause a denial of service (DoS).

Source: CVE List, as of . About the data.

Weakness

CWE-122

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

DateEvent
CVE record published
CVE record last updated

References

3

Known exploited Red Hat vulnerabilities

  • CVE-2015-3246: Red Hat Libuser Race Condition Vulnerability (added )
  • CVE-2015-5287: Red Hat Automatic Bug Reporting Tool Privilege Escalation Vulnerability (added )
  • CVE-2018-14667: Red Hat JBoss RichFaces Framework Expression Language Injection Vulnerability (added )
  • CVE-2021-3560: Red Hat Polkit Incorrect Authorization Vulnerability (added )
  • CVE-2021-4034: Red Hat Polkit Out-of-Bounds Read and Write Vulnerability (added )