CVE-2026-89541Medium· 6.5▾ SunlitA flaw was found in the Linux kernel. Specifically, an integer overflow vulnerability exists in the `gss_unwrap_resp_priv()` function within the SUNRPC component. This flaw occurs when validating the length of RPCSEC_GSS opaque data. A mal…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.8 · 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 Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
— → 9.8
none → critical
9.8 → 5.9
critical → medium
5.9 → 9.8
medium → critical
9.8 → 7
critical → high
0.2% → 0.8%
7 → 9.8
high → critical
Last analysed / modified upstream
9.8 → 6.5
critical → medium
A flaw was found in the Linux kernel. Specifically, an integer overflow vulnerability exists in the gss_unwrap_resp_priv() function within the SUNRPC component. This flaw occurs when validating the length of RPCSEC_GSS opaque data. A malicious krb5p Network File System (NFS) server can send a specially crafted RPCSEC_GSS reply, leading to an out-of-bounds read. This could potentially result in information disclosure or a denial of service (DoS) on the client system.
kernel: SUNRPC: harden gss_unwrap_resp_priv length checks — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-10-23.
Affected:
No fix planned:
Out of support scope
Workarounds / mitigations:
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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