CVE-2026-43088 Affecting kernel-macros package, versions <6.4.0-150700.53.55.1


Severity

Recommended
medium

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.02% (7th percentile)

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  • Snyk IDSNYK-SLES157-KERNELMACROS-17151324
  • published4 Jun 2026
  • disclosed3 Jun 2026

Introduced: 3 Jun 2026

NewCVE-2026-43088  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 kernel-macros to version 6.4.0-150700.53.55.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-macros package and not the kernel-macros package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

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

net: af_key: zero aligned sockaddr tail in PF_KEY exports

PF_KEY export paths use pfkey_sockaddr_size() when reserving sockaddr payload space, so IPv6 addresses occupy 32 bytes on the wire. However, pfkey_sockaddr_fill() initializes only the first 28 bytes of struct sockaddr_in6, leaving the final 4 aligned bytes uninitialized.

Not every PF_KEY message is affected. The state and policy dump builders already zero the whole message buffer before filling the sockaddr payloads. Keep the fix to the export paths that still append aligned sockaddr payloads with plain skb_put():

  • SADB_ACQUIRE
  • SADB_X_NAT_T_NEW_MAPPING
  • SADB_X_MIGRATE

Fix those paths by clearing only the aligned sockaddr tail after pfkey_sockaddr_fill().

CVSS Base Scores

version 3.1