Description
In the Linux kernel, the following vulnerability has been resolved: ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS Blamed commits forgot that vxlan/geneve use udp_tunnel[6]_xmit_skb() which call iptunnel_xmit_stats(). iptunnel_xmit_stats() was assuming tunnels were only using NETDEV_PCPU_STAT_TSTATS. @syncp offset in pcpu_sw_netstats and pcpu_dstats is different. 32bit kernels would either have corruptions or freezes if the syncp sequence was overwritten. This patch also moves pcpu_stat_type closer to dev->{t,d}stats to avoid a potential cache line miss since iptunnel_xmit_stats() needs to read it.
Affected products
linux: linux kernel
References5
- git.kernel.org/stable/c/0d087d00161f562d5047cc4009bb0c6a19daf9f1 Patch
- git.kernel.org/stable/c/8431c602f551549f082bbfa67f3003f2d8e3e132 Patch
- git.kernel.org/stable/c/127c5e6e2d6fa8185314537c08204ec3515eae99
- git.kernel.org/stable/c/5d562153b4719234227f99c2fb529f98a6a44d15
- git.kernel.org/stable/c/e40e2d11ced8119d3e4469ebe91264bc1cf71530
Metrics
- CVSS 3.1
-
8.2
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H - EPSS — exploit probability
- 1% percentile: 44 · as of 12 November 2026
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