{"id":"CVE-2026-23154","revision":"0c24680a0b0542dc9671dc1fc29c0e5f","records":[{"revision":"0c24680a0b0542dc9671dc1fc29c0e5f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-23154","aliases":[],"title":"net: fix segmentation of forwarding fraglist GRO","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix segmentation of forwarding fraglist GRO\n\nThis patch enhances GSO segment handling by properly checking\nthe SKB_GSO_DODGY flag for frag_list GSO packets, addressing\nlow throughput issues observed when a station accesses IPv4\nservers via hotspots with an IPv6-only upstream interface.\n\nSpecifically, it fixes a bug in GSO segmentation when forwarding\nGRO packets containing a frag_list. The function skb_segment_list\ncannot correctly process GRO skbs that have been converted by XLAT,\nsince XLAT only translates the header of the head skb. Consequently,\nskbs in the frag_list may remain untranslated, resulting in protocol\ninconsistencies and reduced throughput.\n\nTo address this, the patch explicitly sets the SKB_GSO_DODGY flag\nfor GSO packets in XLAT's IPv4/IPv6 protocol translation helpers\n(bpf_skb_proto_4_to_6 and bpf_skb_proto_6_to_4). This marks GSO\npackets as potentially modified after protocol translation. As a\nresult, GSO segmentation will avoid using skb_segment_list and\ninstead falls back to skb_segment for packets with the SKB_GSO_DODGY\nflag. This ensures that only safe and fully translated frag_list\npackets are processed by skb_segment_list, resolving protocol\ninconsistencies and improving throughput when forwarding GRO packets\nconverted by XLAT.","state":0,"publishedAt":"2026-02-14T16:01:21.758+00:00","modifiedAt":"2026-10-19T18:25:33.706+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/core/filter.c\",\n                        \"net/ipv4/tcp_offload.c\",\n                        \"net/ipv4/udp_offload.c\",\n                        \"net/ipv6/tcpv6_offload.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"9fd1ff5d2ac7181844735806b0a703c942365291\",\n                            \"lessThan\": \"9122d7280b2303e835cdfec156bd932ac1f586ed\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9fd1ff5d2ac7181844735806b0a703c942365291\",\n                            \"lessThan\": \"2cbef9ea5a0ac51863ede35c45f26931a85d3888\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9fd1ff5d2ac7181844735806b0a703c942365291\",\n                            \"lessThan\": \"3e62db1e3140449608975e29e0979cc5f3b1cc07\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9fd1ff5d2ac7181844735806b0a703c942365291\",\n                            \"lessThan\": \"3d48d59235c494d34e32052f768393111c0806ef\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9fd1ff5d2ac7181844735806b0a703c942365291\",\n                            \"lessThan\": \"426ca15c7f6cb6562a081341ca88893a50c59fa2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/core/filter.c\",\n                        \"net/ipv4/tcp_offload.c\",\n                        \"net/ipv4/udp_offload.c\",\n                        \"net/ipv6/tcpv6_offload.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.167\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.130\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.69\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.9\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/9122d7280b2303e835cdfec156bd932ac1f586ed","https://git.kernel.org/stable/c/2cbef9ea5a0ac51863ede35c45f26931a85d3888","https://git.kernel.org/stable/c/3e62db1e3140449608975e29e0979cc5f3b1cc07","https://git.kernel.org/stable/c/3d48d59235c494d34e32052f768393111c0806ef","https://git.kernel.org/stable/c/426ca15c7f6cb6562a081341ca88893a50c59fa2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23154","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-23154","identifiers":["CVE-2026-23154"]},"retained":false,"historicalAffected":[]}],"coverage":[]}