Buffer overflow in Red Hat Enterprise Linux 10
CVE-2026-43958
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (6.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000
Affected products
- Red Hat Enterprise Linux 10 — versions 0:1.8.0-21.el10_2
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8 — versions 0:1.7.0-17.el8_10
- Red Hat Enterprise Linux 9 — versions 0:1.7.2-22.el9_8
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-43958 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:33731 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:34155 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:34156 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:68702 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:71600 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:72278 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:72277 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-43958?
- CVE-2026-43958 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-06-01.
- How severe is CVE-2026-43958?
- High severity. CVSS v3 base score is 7.8 out of 10.