CVE-2026-16529: Red Hat Enterprise Linux 10 · Integer Overflow or Wraparound
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 7.5 High.
Data as of 29 Oct 2026, 10:37 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 41% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 30 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10pcp | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10.0 Extended Update Supportpcp | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8pcp | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportpcp | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onpcp | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportpcp | Affected– | Fixed in– |
AI-suggested
Red Hat advises ensuring that the PCP services pmlogger and pmcd are not exposed to untrusted networks. By default, these services listen only on the loopback interface, which prevents remote exploitation. If the default network bindings have been altered, revert them to restrict access to localhost. For pmlogger, ensure the PMLOGGER_LOCAL environment variable is set. If remote access is not required, implement firewall rules to block external connections to TCP ports 4330 (pmlogger) and 44321 (pmcd). Restart affected PCP services after making configuration changes.
Description
A signed integer overflow in the PCP __pmGetPDU() function can be exploited via crafted network packets during PDU processing or SASL negotiation. This permanently blinds the affected daemon, resulting in a total denial of service (DoS) for subsequent packet reads.
References
- access.redhat.com/security/cve/CVE-2026-16529 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2506032 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:55560 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:55617 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:55740 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:72272 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:72273 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:72593 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:72594 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:73767 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:74612 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:74613 (opens in a new tab)