UpHeron
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Servers and applications

CVE-2026-7383

Issue summary: A signed integer overflow when sizing the destination buffer for Unicode output in ASN1_mbstring_ncopy() can lead to a heap buffer overflow. Impact summary: A heap buffer overflow may lead to a crash or possibly attacker controlled code execution or other undefined behaviour. In ASN1_mbstring_copy() and ASN1_mbstring_ncopy() the destination size for Unicode output is computed in a…

Severity
High 8.1
Published
9 Jun 2026
Last changed
23 Jul 2026
Added to UpHeron
21 Oct 2026
Fixed in
1.0.2zq, 1.1.1zh, 3.0.21, 3.4.6, 3.5.7, 3.6.3
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • Version 4.0.0
  • From 3.6.0 before 3.6.3
  • From 3.5.0 before 3.5.7
  • From 3.4.0 before 3.4.6
All 7 release lines
  • From 1.0.2 before 1.0.2zq
  • From 1.1.1 before 1.1.1zh
  • From 3.0.0 before 3.0.21
  • From 3.4.0 before 3.4.6
  • From 3.5.0 before 3.5.7
  • From 3.6.0 before 3.6.3
  • Version 4.0.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-7383
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-7383