Red Hat Enterprise Linux up to 10 rrdcached stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.8$5k-$25k0.00

Summaryinfo

A vulnerability was found in Red Hat Enterprise Linux 6/7/8/9/10 and classified as critical. This issue affects some unknown processing of the component rrdcached. Executing a manipulation can lead to stack-based overflow. This vulnerability is handled as CVE-2026-43958. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux 6/7/8/9/10. It has been declared as critical. This vulnerability affects an unknown code of the component rrdcached. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at access.redhat.com. This vulnerability was named CVE-2026-43958 since 05/04/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/03/2026).

The vulnerability scanner Nessus provides a plugin with the ID 324076 (RHEL 10 : rrdtool (RHSA-2026:33731)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (324076), EUVD (EUVD-2026-33726) and CERT Bund (WID-SEC-2026-2141). Once again VulDB remains the best source for vulnerability data.

Affected

  • Red Hat Enterprise Linux
  • Oracle Linux

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.8
VulDB Temp Score: 7.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (redhat): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 324076
Nessus Name: RHEL 10 : rrdtool (RHSA-2026:33731)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/04/2026 CVE reserved
06/01/2026 +28 days Advisory disclosed
06/01/2026 +0 days VulDB entry created
07/03/2026 +32 days VulDB entry last update

Sourcesinfo

Vendor: redhat.com

Advisory: access.redhat.com
Status: Confirmed

CVE: CVE-2026-43958 (🔒)
GCVE (CVE): GCVE-0-2026-43958
GCVE (VulDB): GCVE-100-367756
EUVD: 🔒
CERT Bund: WID-SEC-2026-2141 - Red Hat Enterprise Linux (rrdcached): Schwachstelle ermöglicht Codeausführung und DoS

Entryinfo

Created: 06/01/2026 22:02
Updated: 07/03/2026 05:16
Changes: 06/01/2026 22:02 (63), 07/01/2026 06:54 (1), 07/02/2026 15:00 (7), 07/03/2026 05:16 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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