CVE-2026-43040High· 7.1▾ TwilightIn 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 …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 39.1 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.1%
0.1% → 0.2%
Last analysed / modified upstream
— → 7.1
none → high
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.
linux_kernel >= 2.6.24, < 5.10.253linux_kernel >= 5.11, < 5.15.203linux_kernel >= 5.16, < 6.1.168linux_kernel >= 6.2, < 6.6.134linux_kernel >= 6.7, < 6.12.81linux_kernel >= 6.13, < 6.18.22linux_kernel >= 6.19, < 6.19.12linux_kernel = 7.0Upgrade past the affected range:
linux_kernel 6.19.12Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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