Yüksek CVSS 7.5

CVE-2026-3497: Ubuntu Linux: güvenlik açığı

Yayın: 12 Mart 2026 22:16 · Güncelleme: 6 Kasım 2026 10:18

Açıklama (NVD)

Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions and does not affect the OpenSSH upstream project itself. The usage of sshpkt_disconnect() on an error, which does not terminate the process, allows an attacker to send an unexpected GSSAPI message type during the GSSAPI key exchange to the server, which will call the underlying function and continue the execution of the program without setting the related connection variables. As the variables are not initialized to NULL the code later accesses those uninitialized variables, accessing random memory, which could lead to undefined behavior. The recommended workaround is to use ssh_packet_disconnect() instead, which does terminate the process. The impact of the vulnerability depends heavily on the compiler flag hardening configuration.

Özet bilgiler

Ürün: Canonical Ubuntu Linux
CVSS v3.1: 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0: 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS: %2,27 (yüzdelik 83)
CWE: CWE-908
Yama: Yok / bilinmiyor

Etkilenen sürümler

Ürün	Başlangıç	Bitiş	Düzeltildi
canonical-ubuntu-linux	25.10	25.10	—
openbsd-openssh	—	—	—
canonical-ubuntu-linux	20.04	20.04	—
canonical-ubuntu-linux	22.04	22.04	—
canonical-ubuntu-linux	24.04	24.04	—
debian-debian-linux	11.0	11.0	—
redhat-enterprise-linux	8.0	8.0	—
redhat-enterprise-linux	9.0	9.0	—
redhat-enterprise-linux	10.0	10.0	—

Kaynaklar

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