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CVE-2026-12340

Опубликовано: 25 июн. 2026
Источник: ubuntu
Приоритет: medium
EPSS Низкий
CVSS3: 7.5

Описание

Out-of-bounds heap read during SM2/SM3 certificate signature verification. When parsing a certificate with an SM3wSM2 signature, the Subject Key Identifier computation reads the trailing 65 bytes of the public key without checking that the key is at least that long. A public key shorter than 65 bytes results in an out-of-bounds heap read, leading to a potential crash (denial of service); there is no out-of-bounds write. Note this only affects builds with SM2 support (--enable-sm2 or --enable-all).

РелизСтатусПримечание
devel

needs-triage

esm-apps-legacy/xenial

needs-triage

esm-apps/bionic

needs-triage

esm-apps/focal

needs-triage

esm-apps/jammy

needs-triage

esm-apps/noble

needs-triage

esm-apps/resolute

needs-triage

jammy

needs-triage

noble

needs-triage

questing

ignored

end of life, was needs-triage

Показывать по

EPSS

Процентиль: 13%
0.00226
Низкий

7.5 High

CVSS3

Связанные уязвимости

CVSS3: 7.5
nvd
около 2 месяцев назад

Out-of-bounds heap read during SM2/SM3 certificate signature verification. When parsing a certificate with an SM3wSM2 signature, the Subject Key Identifier computation reads the trailing 65 bytes of the public key without checking that the key is at least that long. A public key shorter than 65 bytes results in an out-of-bounds heap read, leading to a potential crash (denial of service); there is no out-of-bounds write. Note this only affects builds with SM2 support (--enable-sm2 or --enable-all).

msrc
около 1 месяца назад

Out-of-bounds heap read in SM2/SM3 certificate Subject Key Identifier computation

CVSS3: 7.5
debian
около 2 месяцев назад

Out-of-bounds heap read during SM2/SM3 certificate signature verificat ...

CVSS3: 7.5
github
около 2 месяцев назад

Out-of-bounds heap read during SM2/SM3 certificate signature verification. When parsing a certificate with an SM3wSM2 signature, the Subject Key Identifier computation reads the trailing 65 bytes of the public key without checking that the key is at least that long. A public key shorter than 65 bytes results in an out-of-bounds heap read, leading to a potential crash (denial of service); there is no out-of-bounds write. Note this only affects builds with SM2 support (--enable-sm2 or --enable-all).

EPSS

Процентиль: 13%
0.00226
Низкий

7.5 High

CVSS3