CVE-2026-43958Rrdtool: rrdtool: stack buffer overflow allows local code execution or denial of service
- 7.8HighCVSS base score
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A flaw was found in rrdcached, a component of rrdtool. A local attacker with access to a rrdcached socket can exploit a stack-based buffer overflow by sending an oversized CREATE request. This vulnerability can lead to a denial of service by crashing the daemon or potentially allow for arbitrary code execution, impacting the integrity and confidentiality of data.
Timeline
ID reserved
By redhat
- 28 days later
· 28 days later
Published
- 5 months later
· 5 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 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
Red Hat · Red Hat Enterprise Linux 10
- unaffected 0:1.8.0-21.el10_2 – < *
Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Support
- unaffected 0:1.8.0-20.el10_0.1 – < *
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:1.7.0-17.el8_10 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:1.7.2-22.el9_8 – < *
Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- unaffected 0:1.7.2-21.el9_2.1 – < *
Red Hat · Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
- unaffected 0:1.7.2-21.el9_4.1 – < *
Red Hat · Red Hat Enterprise Linux 9.6 Extended Update Support
- unaffected 0:1.7.2-21.el9_6.1 – < *
Red Hat · Red Hat Enterprise Linux 6
All versions: affected
Red Hat · Red Hat Enterprise Linux 7
All versions: affected
What to do
Workaround: Restrict access to the `rrdcached` UNIX socket using filesystem permissions and group ownership to prevent untrusted local users from connecting. Avoid exposing `rrdcached` on TCP listeners unless strictly necessary, and ensure any such listeners are protected by network access controls. Additionally, run the `rrdcached` daemon as an unprivileged user and group using the `-U` and `-G` options to minimize impact in case of compromise. If `rrdcached` is restarted or reloaded, these configurations will be reapplied.
References
References9
- RHSA-2026:33731 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:34155 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:34156 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:68702 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:71600 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:72277 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:72278 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-43958 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2460932 (opens in a new tab)issue-trackingx_refsource_REDHAT
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-2026-33726 (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-2026-43958)Record last updated .