PatchTheCVECVE-2026-75805: Issue summary: A CMP client that requests certificate revocation on the basis of a PKCS#10 CSR may dereference
CVE-2026-75805 is a medium-severity flaw (CVSS 5.3) affecting openssl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Issue summary: A CMP client that requests certificate revocation on the basis of a PKCS#10 CSR may dereference a NULL pointer and terminate abnormally when processing a crafted revocation response. Impact summary: The NULL pointer dereference happens on a read which leads to a crash and a Denial of Service for the affected client application. CWE: CWE-476: NULL-pointer dereference Description: A CMP client revoking a certificate has to tell
Why this priority
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 75%) |
| CISA exploited list | No |
| Weakness | CWE-476 |
| Published | 2026-09-29 |
| Last modified | 2026-10-08 |
Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-75805?
openssl: upgrade to 3.0.23, 3.4.8, 3.5.9, 3.6.5, 4.0.3. Exact commands for each OS are on this page.
Is CVE-2026-75805 being exploited?
CVE-2026-75805 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-75805 affect?
CVE-2026-75805 affects openssl. Severity is medium (CVSS 5.3). Issue summary: A CMP client that requests certificate revocation on the basis of a PKCS#10 CSR may dereference a NULL pointer and terminate abnormally when processing a crafted revocation response. Impact summary: The NULL pointer derefer
How urgent is CVE-2026-75805?
Priority 35/100. Remotely exploitable, no login, no user action; On your watchlist
Software pages
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