{"cve":"CVE-2023-53109","nvd":{"published":"2025-05-02T16:15:29.823","modified":"2026-06-17T06:44:18.943","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tunnels: annotate lockless accesses to dev->needed_headroom\n\nIP tunnels can apparently update dev->needed_headroom\nin their xmit path.\n\nThis patch takes care of three tunnels xmit, and also the\ncore LL_RESERVED_SPACE() and LL_RESERVED_SPACE_EXTRA()\nhelpers.\n\nMore changes might be needed for completeness.\n\nBUG: KCSAN: data-race in ip_tunnel_xmit / ip_tunnel_xmit\n\nread to 0xffff88815b9da0ec of 2 bytes by task 888 on cpu 1:\nip_tunnel_xmit+0x1270/0x1730 net/ipv4/ip_tunnel.c:803\n__gre_xmit net/ipv4/ip_gre.c:469 [inline]\nipgre_xmit+0x516/0x570 net/ipv4/ip_gre.c:661\n__netdev_start_xmit include/linux/netdevice.h:4881 [inline]\nnetdev_start_xmit include/linux/netdevice.h:4895 [inline]\nxmit_one net/core/dev.c:3580 [inline]\ndev_hard_start_xmit+0x127/0x400 net/core/dev.c:3596\n__dev_queue_xmit+0x1007/0x1eb0 net/core/dev.c:4246\ndev_queue_xmit include/linux/netdevice.h:3051 [inline]\nneigh_direct_output+0x17/0x20 net/core/neighbour.c:1623\nneigh_output include/net/neighbour.h:546 [inline]\nip_finish_output2+0x740/0x840 net/ipv4/ip_output.c:228\nip_finish_output+0xf4/0x240 net/ipv4/ip_output.c:316\nNF_HOOK_COND include/linux/netfilter.h:291 [inline]\nip_output+0xe5/0x1b0 net/ipv4/ip_output.c:430\ndst_output include/net/dst.h:444 [inline]\nip_local_out+0x64/0x80 net/ipv4/ip_output.c:126\niptunnel_xmit+0x34a/0x4b0 net/ipv4/ip_tunnel_core.c:82\nip_tunnel_xmit+0x1451/0x1730 net/ipv4/ip_tunnel.c:813\n__gre_xmit net/ipv4/ip_gre.c:469 [inline]\nipgre_xmit+0x516/0x570 net/ipv4/ip_gre.c:661\n__netdev_start_xmit include/linux/netdevice.h:4881 [inline]\nnetdev_start_xmit include/linux/netdevice.h:4895 [inline]\nxmit_one net/core/dev.c:3580 [inline]\ndev_hard_start_xmit+0x127/0x400 net/core/dev.c:3596\n__dev_queue_xmit+0x1007/0x1eb0 net/core/dev.c:4246\ndev_queue_xmit include/linux/netdevice.h:3051 [inline]\nneigh_direct_output+0x17/0x20 net/core/neighbour.c:1623\nneigh_output include/net/neighbour.h:546 [inline]\nip_finish_output2+0x740/0x840 net/ipv4/ip_output.c:228\nip_finish_output+0xf4/0x240 net/ipv4/ip_output.c:316\nNF_HOOK_COND include/linux/netfilter.h:291 [inline]\nip_output+0xe5/0x1b0 net/ipv4/ip_output.c:430\ndst_output include/net/dst.h:444 [inline]\nip_local_out+0x64/0x80 net/ipv4/ip_output.c:126\niptunnel_xmit+0x34a/0x4b0 net/ipv4/ip_tunnel_core.c:82\nip_tunnel_xmit+0x1451/0x1730 net/ipv4/ip_tunnel.c:813\n__gre_xmit net/ipv4/ip_gre.c:469 [inline]\nipgre_xmit+0x516/0x570 net/ipv4/ip_gre.c:661\n__netdev_start_xmit include/linux/netdevice.h:4881 [inline]\nnetdev_start_xmit include/linux/netdevice.h:4895 [inline]\nxmit_one net/core/dev.c:3580 [inline]\ndev_hard_start_xmit+0x127/0x400 net/core/dev.c:3596\n__dev_queue_xmit+0x1007/0x1eb0 net/core/dev.c:4246\ndev_queue_xmit include/linux/netdevice.h:3051 [inline]\nneigh_direct_output+0x17/0x20 net/core/neighbour.c:1623\nneigh_output include/net/neighbour.h:546 [inline]\nip_finish_output2+0x740/0x840 net/ipv4/ip_output.c:228\nip_finish_output+0xf4/0x240 net/ipv4/ip_output.c:316\nNF_HOOK_COND include/linux/netfilter.h:291 [inline]\nip_output+0xe5/0x1b0 net/ipv4/ip_output.c:430\ndst_output include/net/dst.h:444 [inline]\nip_local_out+0x64/0x80 net/ipv4/ip_output.c:126\niptunnel_xmit+0x34a/0x4b0 net/ipv4/ip_tunnel_core.c:82\nip_tunnel_xmit+0x1451/0x1730 net/ipv4/ip_tunnel.c:813\n__gre_xmit net/ipv4/ip_gre.c:469 [inline]\nipgre_xmit+0x516/0x570 net/ipv4/ip_gre.c:661\n__netdev_start_xmit include/linux/netdevice.h:4881 [inline]\nnetdev_start_xmit include/linux/netdevice.h:4895 [inline]\nxmit_one net/core/dev.c:3580 [inline]\ndev_hard_start_xmit+0x127/0x400 net/core/dev.c:3596\n__dev_queue_xmit+0x1007/0x1eb0 net/core/dev.c:4246\ndev_queue_xmit include/linux/netdevice.h:3051 [inline]\nneigh_direct_output+0x17/0x20 net/core/neighbour.c:1623\nneigh_output include/net/neighbour.h:546 [inline]\nip_finish_output2+0x740/0x840 net/ipv4/ip_output.c:228\nip_finish_output+0xf4/0x240 net/ipv4/ip_output.c:316\nNF_HOOK_COND include/linux/netfilter.h:291 [inline]\nip_output+0xe5/0x1b0 net/i\n---truncated---","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/4b397c06cb987935b1b097336532aa6b4210e091","https://git.kernel.org/stable/c/51f3bd3765bc5ca4583af07a00833da00d2ace1d","https://git.kernel.org/stable/c/5aaab217c8f5387b9c5fff9e940d80f135e04366","https://git.kernel.org/stable/c/8e206f66d824b3b28a7f9ee1366dfc79a937bb46","https://git.kernel.org/stable/c/9b86a8702b042ee4e15d2d46375be873a6a8834f"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:01:22.920403922+00:00"},"epss":{"cve":"CVE-2023-53109","score":0.00202,"percentile":0.10222,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}