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THREAT OPS › Threat News › [NVD] CVE-2026-43089 (MEDIUM 5.5) — In the Linux kernel, the following vulnerability has been resolved: xfrm_user: fix info leak in build_mapping() struct xfrm_usersa_id has a one-byte padding hole after the proto field, which ends up never getting set to zero before copying out to userspace. Fix that up by zero

[NVD] CVE-2026-43089 (MEDIUM 5.5) — In the Linux kernel, the following vulnerability has been resolved: xfrm_user: fix info leak in build_mapping() struct xfrm_usersa_id has a one-byte padding hole after the proto field, which ends up never getting set to zero before copying out to userspace. Fix that up by zero

lownvdPublished 2026-05-06

CVE-2026-43089 CVSS: 5.5 MEDIUM Published: 2026-05-06T10:16:22.200

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

xfrm_user: fix info leak in build_mapping()

struct xfrm_usersa_id has a one-byte padding hole after the proto field, which ends up never getting set to zero before copying out to userspace. Fix that up by zeroing out the whole structure before setting individua

Indicators of compromise

CVE-2026-43089cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-43089