CVE-2025-9820— Gnutls: stack-based buffer overflow in gnutls_pkcs11_token_init() function
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I. Basic Information for CVE-2025-9820
Vulnerability Information
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Vulnerability Title
Gnutls: stack-based buffer overflow in gnutls_pkcs11_token_init() function
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in the GnuTLS library, specifically in the gnutls_pkcs11_token_init() function that handles PKCS#11 token initialization. When a token label longer than expected is processed, the function writes past the end of a fixed-size stack buffer. This programming error can cause the application using GnuTLS to crash or, in certain conditions, be exploited for code execution. As a result, systems or applications relying on GnuTLS may be vulnerable to a denial of service or local privilege escalation attacks.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
GnuTLS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GnuTLS是GnuTLS开源的一款免费的用于实现SSL、TLS和DTLS协议的安全通信库。 GnuTLS存在安全漏洞，该漏洞源于gnutls_pkcs11_token_init函数存在栈缓冲区溢出，可能导致拒绝服务或本地权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:3.8.10-3.el10_1 ~ * | cpe:/o:redhat:enterprise_linux:10.1 | |
| Red Hat | Red Hat Enterprise Linux 8 | 0:3.6.16-8.el8_10.5 ~ * | cpe:/a:redhat:enterprise_linux:8::appstream | |
| Red Hat | Red Hat Enterprise Linux 8 | 0:3.6.16-8.el8_10.5 ~ * | cpe:/a:redhat:enterprise_linux:8::appstream | |
| Red Hat | Red Hat Enterprise Linux 9 | 0:3.8.3-10.el9_7 ~ * | cpe:/a:redhat:enterprise_linux:9::appstream | |
| Red Hat | Red Hat Enterprise Linux 9 | 0:3.8.3-10.el9_7 ~ * | cpe:/a:redhat:enterprise_linux:9::appstream | |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-4.1777325677 ~ * | cpe:/a:redhat:rhosemc:1.0::el8 | |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-4.1777325711 ~ * | cpe:/a:redhat:rhosemc:1.0::el8 | |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-4.1777325710 ~ * | cpe:/a:redhat:rhosemc:1.0::el8 | |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-3.1777325680 ~ * | cpe:/a:redhat:rhosemc:1.0::el8 | |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-4.1777325709 ~ * | cpe:/a:redhat:rhosemc:1.0::el8 | |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-4.1777325680 ~ * | cpe:/a:redhat:rhosemc:1.0::el8 | |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-4.1777325708 ~ * | cpe:/a:redhat:rhosemc:1.0::el8 | |
| Red Hat | Red Hat Ceph Storage 8 | 1774002867 ~ * | cpe:/a:redhat:ceph_storage:8::el9 | |
| Red Hat | Red Hat Discovery 2 | 1775668717 ~ * | cpe:/a:redhat:discovery:2::el9 | |
| Red Hat | Red Hat Discovery 2 | 1775675922 ~ * | cpe:/a:redhat:discovery:2::el9 | |
| Red Hat | Red Hat Hardened Images | 3.8.12-1.1.hum1 ~ * | cpe:/a:redhat:hummingbird:1 | |
| Red Hat | Red Hat Insights proxy 1.5 | 1773685509 ~ * | cpe:/a:redhat:insights_proxy:1.5::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1773670073 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1773672059 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1773668803 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1773670137 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Enterprise Linux 6 | - | cpe:/o:redhat:enterprise_linux:6 | |
| Red Hat | Red Hat Enterprise Linux 7 | - | cpe:/o:redhat:enterprise_linux:7 | |
| Red Hat | Red Hat OpenShift Container Platform 4 | - | cpe:/a:redhat:openshift:4 |
II. Public POCs for CVE-2025-9820
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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Same Patch Batch · Red Hat · 2026-01-26 · 6 CVEs total
| CVE-2025-14459 | 8.5 HIGH | Virt-cdi-controller: unauthorized pvc cloning via dataimportcron |
| CVE-2025-14525 | 6.4 MEDIUM | Kubevirt: kubevirt: vm administration denial of service via guest agent |
| CVE-2025-14969 | 4.3 MEDIUM | Hibernate-reactive-core: hibernate reactive: denial of service due to connection leak on h |
| CVE-2026-1190 | 3.1 LOW | Org.keycloak/keycloak-services: keycloak saml brokering: response delay due to unchecked n |
| CVE-2025-9615 | Networkmanager: networkmanager file access |
IV. Related Vulnerabilities
Same product: Red Hat Enterprise Linux 10
- CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constr - CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in u - CVE-2026-6420
Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de - CVE-2026-34000
Xwayland: xorg: x.org x server: information disclosure and d
Same vendor: Red Hat
- CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constr - CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in u - CVE-2026-6420
Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34956
Openvswitch: open vswitch: denial of service via malformed f - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de
Same weakness: CWE-121
- CVE-2026-8258
Squirrel sqstdstring.cpp validate_format stack-based overflo - CVE-2026-8234
EFM ipTIME A8004T WifiBasicSet formWifiBasicSet stack-based - CVE-2026-6665
PgBouncer buffer overflow in SCRAM - CVE-2026-41509
Integer underflow in crypto_sign_open() leads to buffer over - CVE-2026-8138
Tenda CX12L SetPptpServerCfg” formSetPPTPServer stack-based
V. Comments for CVE-2025-9820
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