CVE-2026-89538High· 7.0▾ TwilightA flaw was found in the Linux kernel's Server Unix Remote Procedure Call (SUNRPC) component. A remote attacker, with a valid Generic Security Service (GSS) context, could send a specially crafted Kerberos v2 wrap token with an oversized "e…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 38.5 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
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%
— → 5.3
none → medium
— → 5.3
none → medium
— → 9.8
none → critical
9.8 → 5.3
critical → medium
5.3 → 9.8
medium → critical
0.2% → 0.7%
Last analysed / modified upstream
9.8 → 7
critical → high
A flaw was found in the Linux kernel's Server Unix Remote Procedure Call (SUNRPC) component. A remote attacker, with a valid Generic Security Service (GSS) context, could send a specially crafted Kerberos v2 wrap token with an oversized "extra count" (ec) field. This improper handling of malformed tokens could lead to the buffer being left in a semantically invalid state, potentially causing a denial of service or other unpredictable behavior within the system.
kernel: SUNRPC: Reject krb5 v2 wrap tokens with oversized ec field — 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.
CVE-2026-80936Medium· 5.5kernel: wifi: mt76: mt7925: cancel mlo_pm_work on stop (CVE-2026-80936)
CVE-2026-80947High· 7.0kernel: wifi: rtl8xxxu: fix use-after-free from rx_urb_wq on stop (CVE-2026-80947)
CVE-2026-80980Medium· 5.5kernel: net/smc: stop killed, freed and out_of_sync sharing a byte (CVE-2026-80980)
CVE-2026-80981High· 7.0kernel: net/smc: fix use-after-free of the LLC qentry in smc_llc_srv_add_link() (CVE-2026-80981)
CVE-2026-80985High· 7.0kernel: net/smc: carry oversized SMC-Rv2 LLC messages in the queue entry (CVE-2026-80985)
CVE-2026-80986High· 7.0kernel: net/smc: bound the peer rkey counts in SMC-Rv2 LLC messages (CVE-2026-80986)