Medium 6.8Published May 14, 2012

CVE-2012-2333Integer underflow in OpenSSL before 0.9.8x, 1.0.0 before 1.0.0j, and 1.0.1 before 1.0.1c, when TLS 1.1, TLS 1.2, or DTLS is used with CBC encryption, allows remote attackers to cause a denial of serv…

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

Does this affect you?

It affects openssl and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stackFree account, 3 products Every CVE for openssl Exploited in the last 30 days

Integer underflow in OpenSSL before 0.9.8x, 1.0.0 before 1.0.0j, and 1.0.1 before 1.0.1c, when TLS 1.1, TLS 1.2, or DTLS is used with CBC encryption, allows remote attackers to cause a denial of service (buffer over-read) or possibly have unspecified other impact via a crafted TLS packet that is not properly handled during a certain explicit IV calculation.

CVSS: 6.8 MEDIUM (v2.0, NVD)AV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-189
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

openssl openssl openssl:openssl	through 0.9.8w; 0.9.1c; 0.9.2b; 0.9.3; 0.9.3a; 0.9.4; 0.9.5; 0.9.5; and 88 more ranges	NVD
redhat openssl redhat:openssl	0.9.6-15; 0.9.6b-3; 0.9.7a-2	NVD

References

References

http://cvs.openssl.org/chngview?cn=22538
http://cvs.openssl.org/chngview?cn=22547
http://lists.apple.com/archives/security-announce/2013/Jun/msg00000.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-May/081460.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/092905.html
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00019.html
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00020.html
http://marc.info/?l=bugtraq&m=134919053717161&w=2
http://marc.info/?l=bugtraq&m=136432043316835&w=2
http://rhn.redhat.com/errata/RHSA-2012-0699.html
1–10 of 25

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.