CVE-2026-9149

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

publishedCWE-122

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).

Technical severity6.5 mediumCVSS 3.1 · CNA: redhat

Published2026-05-20Source updated 2026-11-06

Collected2026-11-062 attributed sources

Fixes and workarounds

Workaround

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.

Source: CNA: redhat

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Red Hat Enterprise Linux 10 Red Hat `libsolv` https://access.redhat.com/downloads/content/package-browser/	≥ 0:0.7.33-5.el10_2; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 10.0 Extended Update Support Red Hat `libsolv` https://access.redhat.com/downloads/content/package-browser/	≥ 0:0.7.29-8.el10_0.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Hardened Images Red Hat `libsolv-main` https://catalog.redhat.com/software/containers/	≥ 0.7.38-2.hum1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 7 Red Hat `libsolv` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8 Red Hat `libsolv` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9 Red Hat `libsolv` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift/ose-rhel-coreos-8` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift/ose-rhel-coreos-9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Satellite 6 Red Hat `satellite-capsule:el8/libsolv` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Update Infrastructure 4 for Cloud Providers Red Hat `libsolv` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 6.5 medium	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H`	CNA: redhat

Exploit evidence

https://github.com/openSUSE/libsolv/pull/617
exploit · ADP: CISA-ADP

References

https://access.redhat.com/errata/RHSA-2026:21333CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:28236CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:48818CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-9149CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2460380CNA: redhat · issue-tracking, x_refsource_REDHAT
https://github.com/openSUSE/libsolv/pull/617CNA: redhat
https://github.com/openSUSE/libsolv/pull/617ADP: CISA-ADP · exploit

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