{"id":"CVE-2025-38441","title":"netfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto()\n\nsyzbot found a potential access to uninit-value in nf_flow_pppoe_proto()\n\nBlamed commit forg…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= d06977b9a4109f8738bb276125eb6a0b772bc433 < a3aea97d55964e70a1e6426aa4cafdc036e8a2dd","Linux >= 8bf7c76a2a207ca2b4cfda0a279192adf27678d7 < eed8960b289327235185b7c32649c3470a3e969b","Linux >= a2471d271042ea18e8a6babc132a8716bb2f08b9 < 9fbc49429a23b02595ba82536c5ea425fdabb221","Linux >= 87b3593bed1868b2d9fe096c01bcdf0ea86cbebf < e0dd2e9729660f3f4fcb16e0aef87342911528ef","Linux >= 87b3593bed1868b2d9fe096c01bcdf0ea86cbebf < cfbf0665969af2c69d10c377d4c3d306e717efb4","Linux >= 87b3593bed1868b2d9fe096c01bcdf0ea86cbebf < 18cdb3d982da8976b28d57691eb256ec5688fad2","Linux cf366ee3bc1b7d1c76a882640ba3b3f8f1039163","Linux >= 5.15.157 < 5.15.189","Linux >= 6.1.88 < 6.1.146","Linux >= 6.6.29 < 6.6.99","Linux >= 6.8.8 < 6.9","Linux 6.9"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:56:41.567168Z"},"published":"2025-07-25","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:02:38.282Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38441","references":[{"url":"https://git.kernel.org/stable/c/a3aea97d55964e70a1e6426aa4cafdc036e8a2dd"},{"url":"https://git.kernel.org/stable/c/eed8960b289327235185b7c32649c3470a3e969b"},{"url":"https://git.kernel.org/stable/c/9fbc49429a23b02595ba82536c5ea425fdabb221"},{"url":"https://git.kernel.org/stable/c/e0dd2e9729660f3f4fcb16e0aef87342911528ef"},{"url":"https://git.kernel.org/stable/c/cfbf0665969af2c69d10c377d4c3d306e717efb4"},{"url":"https://git.kernel.org/stable/c/18cdb3d982da8976b28d57691eb256ec5688fad2"}],"tags":["cve.org"],"epss":0.00192,"epssPercentile":0.08927,"ingestedAt":"2026-11-05T22:38:31.970Z","slug":"CVE-2025-38441","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto()\n\nsyzbot found a potential access to uninit-value in nf_flow_pppoe_proto()\n\nBlamed commit forgot the Ethernet header.\n\nBUG: KMSAN: uninit-value in nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27\n  nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27\n  nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]\n  nf_hook_slow+0xe1/0x3d0 net/netfilter/core.c:623\n  nf_hook_ingress include/linux/netfilter_netdev.h:34 [inline]\n  nf_ingress net/core/dev.c:5742 [inline]\n  __netif_receive_skb_core+0x4aff/0x70c0 net/core/dev.c:5837\n  __netif_receive_skb_one_core net/core/dev.c:5975 [inline]\n  __netif_receive_skb+0xcc/0xac0 net/core/dev.c:6090\n  netif_receive_skb_internal net/core/dev.c:6176 [inline]\n  netif_receive_skb+0x57/0x630 net/core/dev.c:6235\n  tun_rx_batched+0x1df/0x980 drivers/net/tun.c:1485\n  tun_get_user+0x4ee0/0x6b40 drivers/net/tun.c:1938\n  tun_chr_write_iter+0x3e9/0x5c0 drivers/net/tun.c:1984\n  new_sync_write fs/read_write.c:593 [inline]\n  vfs_write+0xb4b/0x1580 fs/read_write.c:686\n  ksys_write fs/read_write.c:738 [inline]\n  __do_sys_write fs/read_write.c:749 [inline]\n\n## Affected\n\n- `Linux >= d06977b9a4109f8738bb276125eb6a0b772bc433 < a3aea97d55964e70a1e6426aa4cafdc036e8a2dd`\n- `Linux >= 8bf7c76a2a207ca2b4cfda0a279192adf27678d7 < eed8960b289327235185b7c32649c3470a3e969b`\n- `Linux >= a2471d271042ea18e8a6babc132a8716bb2f08b9 < 9fbc49429a23b02595ba82536c5ea425fdabb221`\n- `Linux >= 87b3593bed1868b2d9fe096c01bcdf0ea86cbebf < e0dd2e9729660f3f4fcb16e0aef87342911528ef`\n- `Linux >= 87b3593bed1868b2d9fe096c01bcdf0ea86cbebf < cfbf0665969af2c69d10c377d4c3d306e717efb4`\n- `Linux >= 87b3593bed1868b2d9fe096c01bcdf0ea86cbebf < 18cdb3d982da8976b28d57691eb256ec5688fad2`\n- `Linux cf366ee3bc1b7d1c76a882640ba3b3f8f1039163`\n- `Linux >= 5.15.157 < 5.15.189`\n- `Linux >= 6.1.88 < 6.1.146`\n- `Linux >= 6.6.29 < 6.6.99`\n- `Linux >= 6.8.8 < 6.9`\n- `Linux 6.9`\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":[]}