{"id":"CVE-2023-53109","title":"net: tunnels: annotate lockless accesses to dev->needed_headroom","summary":"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 th…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < 8e206f66d824b3b28a7f9ee1366dfc79a937bb46","Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < 51f3bd3765bc5ca4583af07a00833da00d2ace1d","Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < 5aaab217c8f5387b9c5fff9e940d80f135e04366","Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < be59b87ee4aed81db7c10e44f603866a0ac3ca5d","Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < e0a557fc1daf5c1086e47150a4571aebadbb62be","Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < a69b72b57b7d269e833e520ba7500d556e8189b6","Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < 9b86a8702b042ee4e15d2d46375be873a6a8834f","Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < 4b397c06cb987935b1b097336532aa6b4210e091","Linux 4.7"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:17:30.741707Z"},"published":"2025-05-02","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:21:01.653Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53109","references":[{"url":"https://git.kernel.org/stable/c/8e206f66d824b3b28a7f9ee1366dfc79a937bb46"},{"url":"https://git.kernel.org/stable/c/51f3bd3765bc5ca4583af07a00833da00d2ace1d"},{"url":"https://git.kernel.org/stable/c/5aaab217c8f5387b9c5fff9e940d80f135e04366"},{"url":"https://git.kernel.org/stable/c/be59b87ee4aed81db7c10e44f603866a0ac3ca5d"},{"url":"https://git.kernel.org/stable/c/e0a557fc1daf5c1086e47150a4571aebadbb62be"},{"url":"https://git.kernel.org/stable/c/a69b72b57b7d269e833e520ba7500d556e8189b6"},{"url":"https://git.kernel.org/stable/c/9b86a8702b042ee4e15d2d46375be873a6a8834f"},{"url":"https://git.kernel.org/stable/c/4b397c06cb987935b1b097336532aa6b4210e091"}],"tags":["cve.org"],"epss":0.00202,"epssPercentile":0.10259,"ingestedAt":"2026-11-05T22:38:31.772Z","slug":"CVE-2023-53109","body":"## Overview\n\nIn 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---\n\n## Affected\n\n- `Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < 8e206f66d824b3b28a7f9ee1366dfc79a937bb46`\n- `Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < 51f3bd3765bc5ca4583af07a00833da00d2ace1d`\n- `Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < 5aaab217c8f5387b9c5fff9e940d80f135e04366`\n- `Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < be59b87ee4aed81db7c10e44f603866a0ac3ca5d`\n- `Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < e0a557fc1daf5c1086e47150a4571aebadbb62be`\n- `Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < a69b72b57b7d269e833e520ba7500d556e8189b6`\n- `Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < 9b86a8702b042ee4e15d2d46375be873a6a8834f`\n- `Linux >= 8eb30be0352d09165e94a41fef1c7b994dca0714 < 4b397c06cb987935b1b097336532aa6b4210e091`\n- `Linux 4.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}