CVE-2026-64448High· 7.0▾ TwilightA flaw was found in the Linux kernel's Server Message Block (SMB) client. An attacker, by operating a malicious SMB server, could send specially crafted responses during the session negotiation phase. This could cause the client to read be…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 38.5 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the vendor's CSAF advisory record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.5%
Last analysed / modified upstream
8.2 → 7
A flaw was found in the Linux kernel's Server Message Block (SMB) client. An attacker, by operating a malicious SMB server, could send specially crafted responses during the session negotiation phase. This could cause the client to read beyond the intended memory buffer, potentially leading to the disclosure of sensitive information from the kernel's memory.
kernel: smb: client: restrict implied bcc[0] exemption to responses without data area — rated Moderate by Red Hat. Released 2026-07-25, updated 2026-10-23.
Affected:
No fix planned:
Not affected:
Affected
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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