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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-43040

net: ipv6: ndisc: fix ndisc_ra_useropt to initialize nduseropt_padX fields to zero to prevent an info-leak

Description

In the Linux kernel, the following vulnerability has been resolved: net: ipv6: ndisc: fix ndisc_ra_useropt to initialize nduseropt_padX fields to zero to prevent an info-leak When processing Router Advertisements with user options the kernel builds an RTM_NEWNDUSEROPT netlink message. The nduseroptmsg struct has three padding fields that are never zeroed and can leak kernel data The fix is simple, just zeroes the padding fields.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 31910575a9de61e78065e93846e8e7a4894a18bf to < 1da9023f6b071a38e5430ffbce4b70b2b1ac4f9caffected
  • 31910575a9de61e78065e93846e8e7a4894a18bf to < 2fe4d0ba690a69ad6ae9f7ab9bdc96e02610b648affected
  • 31910575a9de61e78065e93846e8e7a4894a18bf to < 11d7fe97421cfc81549940c20ed5ac9472d6db05affected
  • 31910575a9de61e78065e93846e8e7a4894a18bf to < 7f56d87e527bb5a13c3e8b0d5840cb6332822f6daffected
  • 31910575a9de61e78065e93846e8e7a4894a18bf to < 4f810c686fde509d1cdaa706322d9d2531f8f1a4affected
  • 31910575a9de61e78065e93846e8e7a4894a18bf to < b485eef3d97b7aae55ce669b6de555ec81f3d21caffected
  • 31910575a9de61e78065e93846e8e7a4894a18bf to < ef3645606e4a635d5062a492f22b7f490852ee67affected
  • 31910575a9de61e78065e93846e8e7a4894a18bf to < ae05340ccaa9d347fe85415609e075545bec589faffected

Linux Linux

Default version status: affected

  • 2.6.24affected
  • 0 to < 2.6.24unaffected
  • 5.10.253 to ≤ 5.10.*unaffected
  • 5.15.203 to ≤ 5.15.*unaffected
  • 6.1.168 to ≤ 6.1.*unaffected
  • 6.6.134 to ≤ 6.6.*unaffected
  • 6.12.81 to ≤ 6.12.*unaffected
  • 6.18.22 to ≤ 6.18.*unaffected
  • 6.19.12 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References