CVE-2026-9149
Libsolv: heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file
- 6.5MediumCVSS base score
- 0.31%Exploitation in 30 daysEPSS · top 76% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
Description
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).
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.
Show the exploits1
References tagged exploit1 reference
Timeline
ID reserved
By redhat
Published
- 6 months later
· 6 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.31% · top 76% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Affected products
Red Hat · Red Hat Enterprise Linux 10
- unaffected 0:0.7.33-5.el10_2 – < *
Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Support
- unaffected 0:0.7.29-8.el10_0.1 – < *
Red Hat · Red Hat Hardened Images
- unaffected 0.7.38-2.hum1 – < *
Red Hat · Red Hat Enterprise Linux 7
All versions: affected
Red Hat · Red Hat Enterprise Linux 8
All versions: affected
Red Hat · Red Hat Enterprise Linux 9
All versions: affected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift Container Platform 4
All versions: affected
Red Hat · Red Hat OpenShift Container Platform 4
All versions: affected
All versions: affected
Red Hat · Red Hat Update Infrastructure 4 for Cloud Providers
All versions: affected
What to do
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.
References
References6
- RHSA-2026:21333 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:28236 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:48818 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-9149 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2460380 (opens in a new tab)issue-trackingx_refsource_REDHAT
- https://github.com/openSUSE/libsolv/pull/617 (opens in a new tab)exploit
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-31201 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-9149)Record last updated .