CVE-2026-89541High· 7.0▾ TwilightA 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…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 38.5 · likelihood 0.1 · exploitation 0
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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%
— → 5.9
none → medium
— → 5.9
none → medium
— → 9.8
none → critical
9.8 → 5.9
critical → medium
5.9 → 9.8
medium → critical
0.2% → 0.5%
Last analysed / modified upstream
9.8 → 7
critical → high
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 2026-09-18.
Affected:
No fix planned:
Out of support scope
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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