Rrdtool: rrdtool: stack buffer overflow allows local code execution or denial of service
Priority LOW 35CWE-121Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 10 fixed, 2 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-121 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00176 7th percentileScored 2026-11-07
Fix Partial Red Hat: 7 advisoriesRed Hat: 10 fixed, 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | 1.8.0-21.el10_2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — | 1.8.0-20.el10_0.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 1.7.0-17.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 1.7.2-22.el9_8 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | 1.7.2-21.el9_2.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | — | 1.7.2-21.el9_4.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | 1.7.2-21.el9_6.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 1.8.0-21.el10_2 Patch available CNA
- Red Hat Enterprise Linux 10.0 Extended Update Support VendorRed Hat Affected — Fixed in 1.8.0-20.el10_0.1 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 1.7.0-17.el8_10 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1.7.2-22.el9_8 Patch available CNA
- Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.7.2-21.el9_2.1 Patch available CNA
- Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.7.2-21.el9_4.1 Patch available CNA
- Red Hat Enterprise Linux 9.6 Extended Update Support VendorRed Hat Affected — Fixed in 1.7.2-21.el9_6.1 Patch available CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE names CNA · 12
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/o:redhat:enterprise_linux:10.2 | 10.2 | — | Red Hat |
| cpe:/o:redhat:enterprise_linux_eus:10.0 | 10.0 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:8::appstream | 8 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:8::crb | 8 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:9::appstream | 9 | — | Red Hat |
| cpe:/a:redhat:enterprise_linux:9::crb | 9 | — | Red Hat |
| cpe:/a:redhat:rhel_e4s:9.2::appstream | 9.2 | — | Red Hat |
| cpe:/a:redhat:rhel_e4s:9.4::appstream | 9.4 | — | Red Hat |
| cpe:/a:redhat:rhel_eus:9.6::appstream | 9.6 | — | Red Hat |
| cpe:/a:redhat:rhel_eus:9.6::crb | 9.6 | — | Red Hat |
- cpe:/o:redhat:enterprise_linux:10.2 Versions 10.2 — ·Red Hat
- cpe:/o:redhat:enterprise_linux_eus:10.0 Versions 10.0 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:8::appstream Versions 8 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:8::crb Versions 8 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:9::appstream Versions 9 — ·Red Hat
- cpe:/a:redhat:enterprise_linux:9::crb Versions 9 — ·Red Hat
- cpe:/a:redhat:rhel_e4s:9.2::appstream Versions 9.2 — ·Red Hat
- cpe:/a:redhat:rhel_e4s:9.4::appstream Versions 9.4 — ·Red Hat
- cpe:/a:redhat:rhel_eus:9.6::appstream Versions 9.6 — ·Red Hat
- cpe:/a:redhat:rhel_eus:9.6::crb Versions 9.6 — ·Red Hat
Remediation
Red Hat 7 advisories
- RHSA-2026:72278 Released 2026-09-28 · Red Hat rating Moderaterrdtool security update
- Red Hat Enterprise Linux AppStream E4S (v.9.4) rrdtool-1.7.2-21.el9_4.1
- RHSA-2026:72277 Released 2026-09-28 · Red Hat rating Moderaterrdtool security update
- Red Hat Enterprise Linux AppStream E4S (v.9.2) rrdtool-1.7.2-21.el9_2.1
- RHSA-2026:71600 Released 2026-09-24 · Red Hat rating Moderaterrdtool security update
- Red Hat Enterprise Linux AppStream EUS (v.9.6) rrdtool-1.7.2-21.el9_6.1
Show 4 more Red Hat advisories
- RHSA-2026:68702 Released 2026-09-17 · Red Hat rating Moderaterrdtool security update
- Red Hat Enterprise Linux AppStream EUS (v. 10.0) rrdtool-1.8.0-20.el10_0.1
- RHSA-2026:34156 Released 2026-07-01 · Red Hat rating Moderaterrdtool security update
- Red Hat Enterprise Linux AppStream (v. 9) rrdtool-1.7.2-22.el9_8, rrdtool-perl-1.7.2-22.el9_8
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) python3-rrdtool-1.7.2-22.el9_8, rrdtool-devel-1.7.2-22.el9_8, rrdtool-doc-1.7.2-22.el9_8 +3
- RHSA-2026:34155 Released 2026-07-01 · Red Hat rating Moderaterrdtool security update
- Red Hat Enterprise Linux AppStream (v. 8) rrdtool-1.7.0-17.el8_10, rrdtool-perl-1.7.0-17.el8_10
- Red Hat Enterprise Linux CRB (v. 8) python3-rrdtool-1.7.0-17.el8_10, rrdtool-devel-1.7.0-17.el8_10, rrdtool-doc-1.7.0-17.el8_10 +3
- RHSA-2026:33731 Released 2026-06-30 · Red Hat rating Moderaterrdtool security update
- Red Hat Enterprise Linux AppStream (v. 10) rrdtool-1.8.0-21.el10_2, rrdtool-perl-1.8.0-21.el10_2
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) python3-rrdtool-1.8.0-21.el10_2, rrdtool-devel-1.8.0-21.el10_2, rrdtool-doc-1.8.0-21.el10_2 +3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 7 | Affected | No fix yet |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:33731 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2026:34155 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:34156 |
| Red Hat Enterprise Linux AppStream E4S (v.9.2) | Fixed | RHSA-2026:72277 |
| Red Hat Enterprise Linux AppStream E4S (v.9.4) | Fixed | RHSA-2026:72278 |
| Red Hat Enterprise Linux AppStream EUS (v. 10.0) | Fixed | RHSA-2026:68702 |
| Red Hat Enterprise Linux AppStream EUS (v.9.6) | Fixed | RHSA-2026:71600 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2026:34155 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) | Fixed | RHSA-2026:33731 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Fixed | RHSA-2026:34156 |
Not affected: 6 products
- Red Hat CodeReady Linux Builder EUS (v.9.6)
- Red Hat Enterprise Linux AppStream E4S (v.9.2)
- Red Hat Enterprise Linux AppStream E4S (v.9.4)
- Red Hat Enterprise Linux AppStream EUS (v. 10.0)
- Red Hat Enterprise Linux AppStream EUS (v.9.6)
- Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
Timeline
- 2026-10-02 Threatist record created from CVE-2026-43958
- 2026-10-03 Alias added: GHSA-pgh2-hfvj-4q69
References
More Red Hat vulnerabilities
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- TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-43958 · CVE Program
- CVE-2026-43958 · NVD
- FIRST EPSS
- GHSA-pgh2-hfvj-4q69 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-43958 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences