How severe is CVE-2010-3864?

CVE-2010-3864 has a CVSS 2.0 base score of 7.6, rated high severity.

Is CVE-2010-3864 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-3864?

CVE-2010-3864 primarily affects Openssl. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-3864?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2010-3864 published?

CVE-2010-3864 was published on 2010-11-17 and last updated on 2026-06-16.

CVE-2010-3864

CVE-2010-3864 is a high-severity vulnerability in Openssl with a CVSS 2.0 base score of 7.6. Its EPSS exploit-prediction score of 22% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-362.

Key facts

Severity: High (CVSS 2.0 base score 7.6)
EPSS exploit prediction: 22% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-362
Affected product: Openssl
Published: 2010-11-17
Last modified: 2026-06-16

Description

Multiple race conditions in ssl/t1_lib.c in OpenSSL 0.9.8f through 0.9.8o, 1.0.0, and 1.0.0a, when multi-threading and internal caching are enabled on a TLS server, might allow remote attackers to execute arbitrary code via client data that triggers a heap-based buffer overflow, related to (1) the TLS server name extension and (2) elliptic curve cryptography.

Frequently asked questions

What is CVE-2010-3864?: Multiple race conditions in ssl/t1_lib.c in OpenSSL 0.9.8f through 0.9.8o, 1.0.0, and 1.0.0a, when multi-threading and internal caching are enabled on a TLS server, might allow remote attackers to execute arbitrary code via client data that triggers a heap-based buffer overflow, related to (1) the TLS server name extension and (2) elliptic curve cryptography.
How severe is CVE-2010-3864?: CVE-2010-3864 has a CVSS 2.0 base score of 7.6, rated high severity.
Is CVE-2010-3864 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-3864?: CVE-2010-3864 primarily affects Openssl. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-3864?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2010-3864 published?: CVE-2010-3864 was published on 2010-11-17 and last updated on 2026-06-16.

References

Affected products (12)

cpe:2.3:a:openssl:openssl:0.9.8f:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8g:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8h:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8i:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8j:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8k:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8l:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8m:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8n:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8o:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:1.0.0a:*:*:*:*:*:*:*

More vulnerabilities in Openssl

CVE-2009-3245 — Critical (CVSS 10.0): OpenSSL before 0.9.8m does not check for a NULL return value from bn_wexpand function calls in (1) crypto/bn/bn_div.c,…
CVE-2006-3738 — Critical (CVSS 10.0): Buffer overflow in the SSL_get_shared_ciphers function in OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier…
CVE-2026-31789 — Critical (CVSS 9.8): Issue summary: Converting an excessively large OCTET STRING value to a hexadecimal string leads to a heap buffer…
CVE-2022-2274 — Critical (CVSS 9.8): The OpenSSL 3.0.4 release introduced a serious bug in the RSA implementation for X86_64 CPUs supporting the AVX512IFMA…
CVE-2021-3711 — Critical (CVSS 9.8): In order to decrypt SM2 encrypted data an application is expected to call the API function EVP_PKEY_decrypt().…
CVE-2016-6309 — Critical (CVSS 9.8): statem/statem.c in OpenSSL 1.1.0a does not consider memory-block movement after a realloc call, which allows remote…

All CVEs affecting Openssl →

Other CWE-362 (Race Condition) vulnerabilities

CVE-2022-27626 — Critical (CVSS 10.0): A vulnerability regarding concurrent execution using shared resource with improper synchronization ('Race Condition')…
CVE-2015-8556 — Critical (CVSS 10.0): Local privilege escalation vulnerability in the Gentoo QEMU package before 2.5.0-r1.
CVE-2014-0703 — Critical (CVSS 10.0): Cisco Wireless LAN Controller (WLC) devices 7.4 before 7.4.110.0 distribute Aironet IOS software with a race condition…
CVE-2010-1228 — Critical (CVSS 10.0): Multiple race conditions in the sandbox infrastructure in Google Chrome before 4.1.249.1036 have unspecified impact and…
CVE-2008-6598 — Critical (CVSS 10.0): Multiple race conditions in WANPIPE before 3.3.6 have unknown impact and attack vectors related to "bri restart logic."
CVE-2026-46137 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADD_ADDR rtx: fix potential…

Browse all CWE-362 (Race Condition) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

121.164.135.251 (ipv4-addr)