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CVE-2026-97590

Linux: s390/crypto: Fix missing scrub of temp buffers with PAES algorithm

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.20%Chance of exploitation activity in the next 30 days, higher than 9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in7d1456d54b3c784cc2917c219a528092cefe30cdAlso 19a218b46b2471d370c11fb52040f36ac8d05d23CVE List
Published25 Sep 2026Updated 19 Oct 2026CVE List

What fixes it

  • 7d1456d54b3c784cc2917c219a528092cefe30cdLinuxCVE List
  • 19a218b46b2471d370c11fb52040f36ac8d05d23LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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

s390/crypto: Fix missing scrub of temp buffers with PAES algorithm

In function ctr_paes_do_crypt() there is a buffer used to process remaining bytes < AES_BLOCK_SIZE. This buffer was not scrubbed and thus could lead to expose of unwanted data. Rework the code to explicitly scrub the buffer at the end of the function to avoid exposure of maybe sensitive data.

In function __xts_2keys_prep_param() change the existing scrub to clean the whole param block instead of just the key field.

Text from CVE List

Affected versions 8

  • Linuxaffected: 6cd87cb5ef6ca50ae17c371482ceaab1d635e232 before 7d1456d54b3c784cc2917c219a528092cefe30cdCVE List
  • Linuxaffected: 6cd87cb5ef6ca50ae17c371482ceaab1d635e232 before d7159d2132e9aa51af7acb51c6742d9b30f987b3CVE List
  • Linuxaffected: 6cd87cb5ef6ca50ae17c371482ceaab1d635e232 before 19a218b46b2471d370c11fb52040f36ac8d05d23CVE List
  • Linuxaffected: 6.16CVE List
  • Linuxunaffected: all versions before 6.16CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2.7 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 3