Security Vulnerabilities
Issue summary: When a partial-chain certificate verification is enabled
together with OCSP response checking for the whole chain, a NULL dereference
will happen if the verified chain does not have a self-signed trusted anchor,
crashing the process.
Impact summary: A NULL pointer dereference can trigger a crash which leads to a
Denial of Service for an application.
When performing OCSP response checking for certificates in the verification
chain, the code always tries to access the next certificate as the issuer.
There is a check for a self-signed certificate. However with the partial
chain verification enabled when the chain does not have a self-signed trusted
anchor, the issuer will be NULL for the last certificate in the chain. A NULL
pointer dereference then happens.
This issue affects only applications which enable both OCSP verification
of the certificate chain (X509_V_FLAG_OCSP_RESP_CHECK_ALL) and partial
chain verification (X509_V_FLAG_PARTIAL_CHAIN) in the certificate
verification. Both flags are disabled by default. For that reason, we have
assigned Low severity to the issue.
No FIPS modules are affected by this issue as the affected code is outside
the OpenSSL FIPS module boundary.
CVSS Score
7.5
EPSS Score
0.004
Published
2026-06-09
Issue summary: A specially crafted password-encrypted CMS message
can trigger a NULL pointer dereference during CMS decryption.
Impact summary: This NULL pointer dereference leads to an application crash
and a Denial of Service.
The CMS PasswordRecipientInfo.keyDerivationAlgorithm field is defined as
OPTIONAL in the ASN.1 specification and may therefore be absent in specially
crafted inputs. During the password-based CMS decryption the OpenSSL
CMS implementation dereferences this field without first checking whether it
was present.
An attacker who supplies such a CMS message to an application performing
password-based CMS decryption can trigger an application crash, leading to
a Denial of Service.
Applications that process password-encrypted CMS messages may be affected.
The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this
issue, as the affected code is outside the OpenSSL FIPS module boundary.
CVSS Score
5.9
EPSS Score
0.006
Published
2026-06-09
Improper input validation in Visual Studio Code allows an unauthorized attacker to elevate privileges over a network.
CVSS Score
7.5
EPSS Score
0.006
Published
2026-06-09
Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability
CVSS Score
7.8
EPSS Score
0.003
Published
2026-06-09
Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability
CVSS Score
7.8
EPSS Score
0.002
Published
2026-06-09
Improper access control in Microsoft Kinect allows an authorized attacker to elevate privileges locally.
CVSS Score
7.8
EPSS Score
0.003
Published
2026-06-09
Improper neutralization of input during web page generation ('cross-site scripting') in Azure Stack Edge allows an authorized attacker to perform spoofing over a network.
CVSS Score
8.4
EPSS Score
0.007
Published
2026-06-09
Heap-based buffer overflow in Microsoft Windows DNS allows an authorized attacker to elevate privileges locally.
CVSS Score
7.0
EPSS Score
0.002
Published
2026-06-09
Issue summary: Remote peer may exhaust heap memory of the QUIC
server or client by flooding it with packets containing PATH_CHALLENGE
frames.
Impact summary: A malicious remote peer can cause an unbounded
memory allocation which can lead to an abnormal termination of the
application acting as a QUIC client or server and a Denial of Service.
A remote peer may exhaust heap memory by flooding the local
QUIC stack with PATH_CHALLENGE frames. The local QUIC stack
allocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives.
The allocated PATH_RESPONSE frame gets freed only when the remote
peer acknowledges reception of the PATH_RESPONSE frame which will
not be done by a malicious peer.
The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by
this issue. The QUIC stack is outside of OpenSSL FIPS module
boundary.
CVSS Score
7.5
EPSS Score
0.005
Published
2026-06-09
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVSS Score
7.0
EPSS Score
0.002
Published
2026-06-09