{"id":"CVE-2026-23459","summary":"ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS\n\nBlamed commits forgot that vxlan/geneve use udp_tunnel[6]_xmit_skb() which\ncall iptunnel_xmit_stats().\n\niptunnel_xmit_stats() was assuming tunnels were only using\nNETDEV_PCPU_STAT_TSTATS.\n\n@syncp offset in pcpu_sw_netstats and pcpu_dstats is different.\n\n32bit kernels would either have corruptions or freezes if the syncp\nsequence was overwritten.\n\nThis patch also moves pcpu_stat_type closer to dev-\u003e{t,d}stats to avoid\na potential cache line miss since iptunnel_xmit_stats() needs to read it.","modified":"2026-07-08T07:59:52.426399678Z","published":"2026-04-03T15:15:39.665Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23459.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0d087d00161f562d5047cc4009bb0c6a19daf9f1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8431c602f551549f082bbfa67f3003f2d8e3e132"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23459.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23459"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"be226352e8dc77d3313c096b2d8e7f69bf6980fc"},{"fixed":"0d087d00161f562d5047cc4009bb0c6a19daf9f1"},{"fixed":"8431c602f551549f082bbfa67f3003f2d8e3e132"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23459.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.14.0"},{"fixed":"6.19.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23459.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"}]}