CVE-2026-84782 OpenSSL - Out-of-Bounds Read

OpenSSL contains an out-of-bounds read caused by improper handling of suspended DTLS handshake message writes during retransmission, letting remote peers disclose heap memory or cause denial of service, exploit requires DTLS handshake in progress with suspended write.

CVSS base score 8.2 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.39% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out-of-Bounds Read
Impact
Information Disclosure, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Published
29 September 2026
Updated
15 October 2026
Weakness
CWE-125

Vendor fix

Update to the latest OpenSSL version containing the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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