CVE-2026-43958
A local attacker with access to a rrdcached socket can exploit a stack-based buffer overflow by sending an oversized CREATE request.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.18%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.18% probability · 7th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-121
- Source
- secalert@redhat.com
EPSS 0.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://access.redhat.com/errata/RHSA-2026:33731
- https://access.redhat.com/errata/RHSA-2026:34155
- https://access.redhat.com/errata/RHSA-2026:34156
- https://access.redhat.com/errata/RHSA-2026:68702
- https://access.redhat.com/errata/RHSA-2026:71600
- https://access.redhat.com/errata/RHSA-2026:72277
- https://access.redhat.com/errata/RHSA-2026:72278
- https://access.redhat.com/security/cve/CVE-2026-43958
- https://bugzilla.redhat.com/show_bug.cgi?id=2460932
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.