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CVE-2026-42765

Опубликовано: 09 июн. 2026
Источник: ubuntu
Приоритет: low
EPSS Низкий
CVSS3: 7.5

Описание

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 verifi...

РелизСтатусПримечание
devel

not-affected

3.6+ only
esm-apps-legacy/xenial

not-affected

3.6+ only
esm-apps/bionic

not-affected

3.6+ only
esm-infra/focal

not-affected

3.6+ only
jammy

not-affected

3.6+ only
noble

not-affected

3.6+ only
questing

not-affected

3.6+ only
resolute

not-affected

3.6+ only
upstream

needs-triage

Показывать по

РелизСтатусПримечание
devel

not-affected

uses system openssl
esm-apps-legacy/xenial

not-affected

3.6+ only
esm-apps/bionic

not-affected

3.6+ only
esm-apps/focal

not-affected

uses system openssl
esm-apps/jammy

needed

esm-apps/noble

not-affected

uses system openssl
esm-apps/resolute

not-affected

uses system openssl
esm-infra-legacy/trusty

not-affected

uses system openssl
jammy

needed

noble

not-affected

uses system openssl

Показывать по

РелизСтатусПримечание
devel

not-affected

3.6+ only
esm-infra-legacy/trusty

not-affected

3.6+ only
esm-infra-legacy/xenial

not-affected

3.6+ only
esm-infra/bionic

not-affected

3.6+ only
esm-infra/focal

not-affected

3.6+ only
fips-preview/jammy

not-affected

3.6+ only
fips-updates/bionic

not-affected

3.6+ only
fips-updates/focal

not-affected

3.6+ only
fips-updates/jammy

not-affected

3.6+ only
fips-updates/xenial

not-affected

3.6+ only

Показывать по

РелизСтатусПримечание
devel

DNE

fips-preview/jammy

not-affected

3.6+ only
fips-updates/jammy

not-affected

3.6+ only
fips-updates/noble

not-affected

3.6+ only
jammy

DNE

noble

DNE

questing

DNE

resolute

DNE

upstream

needs-triage

Показывать по

РелизСтатусПримечание
devel

DNE

esm-infra/bionic

not-affected

3.6+ only
jammy

DNE

noble

DNE

questing

DNE

resolute

DNE

upstream

needs-triage

Показывать по

Ссылки на источники

EPSS

Процентиль: 34%
0.00419
Низкий

7.5 High

CVSS3

Связанные уязвимости

CVSS3: 5.9
redhat
2 месяца назад

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 verifi...

CVSS3: 7.5
nvd
2 месяца назад

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 verifi

msrc
4 дня назад

Описание отсутствует

CVSS3: 7.5
debian
2 месяца назад

Issue summary: When a partial-chain certificate verification is enable ...

CVSS3: 7.5
github
2 месяца назад

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 ver...

EPSS

Процентиль: 34%
0.00419
Низкий

7.5 High

CVSS3