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CVE-2026-43089

xfrm_user: fix info leak in build_mapping()

EPSS 0.1%
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 individual variables.
Affected products
Linux · Linux

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References
https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02https://git.kernel.org/stable/c/521385cbd50ca9474396d88462fcdfa6489685d9https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10https://git.kernel.org/stable/c/72a8de41c3eb4dcf22bf3b674ea38fb2f75d6f32https://git.kernel.org/stable/c/c2779ae9a3e5a044e5ccd564681511bbbcc5fc0fhttps://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24dhttps://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c