CVE-2026-80709 PUBLISHED

s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs

Assigner: Linux
Reserved: 26.08.2026 Published: 28.08.2026 Updated: 28.08.2026

In the Linux kernel, the following vulnerability has been resolved:

s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs

There is a wrong upper limit check for the domain value when an EP11 CPRB is processed for sending to a crypto card. This check is only active on custom device nodes but may lead to access heap memory behind perms->adm when an administrative CPRB is sent. Add correct limit (AP_DOMAINS = 256) checking to fix this.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from cfd68b33094e1a92249850ff3c3c92ae9112a541 to 4589f742718d0256ea6dd1f5a78be6e689bdb8aa (excl.)
  • affected from cfd68b33094e1a92249850ff3c3c92ae9112a541 to b505dcc8307d64468b463dfad45a03bf865c637e (excl.)
  • affected from cfd68b33094e1a92249850ff3c3c92ae9112a541 to 13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15 (excl.)
  • affected from cfd68b33094e1a92249850ff3c3c92ae9112a541 to 672b12940e3f1336dfed5287412a71500adf2a76 (excl.)
  • affected from cfd68b33094e1a92249850ff3c3c92ae9112a541 to 1223477ca88e2396eca440919d0ca8754df79bd5 (excl.)
  • affected from cfd68b33094e1a92249850ff3c3c92ae9112a541 to 983279d7f86ade73db86f886e09172dd567031b5 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.18 is affected
  • unaffected from 0 to 5.18 (excl.)
  • unaffected from 6.1.183 to 6.1.* (incl.)
  • unaffected from 6.6.151 to 6.6.* (incl.)
  • unaffected from 6.12.103 to 6.12.* (incl.)
  • unaffected from 6.18.44 to 6.18.* (incl.)
  • unaffected from 7.1.8 to 7.1.* (incl.)
  • unaffected from 7.2 to * (incl.)

References