Riskcovery

CVE-2026-23459

ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS

State
Published
Severity
8.2 High
Published
Apr 3, 2026
Updated
Oct 21, 2026
Reserved
Jan 13, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.18.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 1db9041e91ac574f1cecc0e98e69ac35832e8088 to before 127c5e6e2d6fa8185314537c08204ec3515eae99Affected
  • cb1c1f3b7ef908408064734fb6bdaf5811b8b84c to before e40e2d11ced8119d3e4469ebe91264bc1cf71530Affected
  • be226352e8dc77d3313c096b2d8e7f69bf6980fc to before 5d562153b4719234227f99c2fb529f98a6a44d15Affected
  • be226352e8dc77d3313c096b2d8e7f69bf6980fc to before 0d087d00161f562d5047cc4009bb0c6a19daf9f1Affected
  • be226352e8dc77d3313c096b2d8e7f69bf6980fc to before 8431c602f551549f082bbfa67f3003f2d8e3e132Affected
  • 6.6.153 to before 6.6.160Affected
LinuxLinux
  • 6.14Affected
  • before 6.14Not affected
  • 6.6.160 through 6.6.*Not affected
  • 6.18.50 through 6.18.*Not affected
  • 6.19.10 through 6.19.*Not affected
  • 7.0 and laterNot affected

References

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