CVE-2026-23154

{"id": "CVE-2026-23154", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2026-02-14T16:15:55.550", "references": [{"url": "https://git.kernel.org/stable/c/2cbef9ea5a0ac51863ede35c45f26931a85d3888", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3d48d59235c494d34e32052f768393111c0806ef", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3e62db1e3140449608975e29e0979cc5f3b1cc07", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/426ca15c7f6cb6562a081341ca88893a50c59fa2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9122d7280b2303e835cdfec156bd932ac1f586ed", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: corrige la segmentaci\u00f3n de reenv\u00edo de fraglist GRO\n\nEste parche mejora el manejo de segmentos GSO al verificar correctamente el flag SKB_GSO_DODGY para paquetes GSO con frag_list, abordando problemas de bajo rendimiento observados cuando una estaci\u00f3n accede a servidores IPv4 a trav\u00e9s de hotspots con una interfaz upstream solo IPv6.\n\nEspec\u00edficamente, corrige un error en la segmentaci\u00f3n GSO al reenviar paquetes GRO que contienen un frag_list. La funci\u00f3n skb_segment_list no puede procesar correctamente los skbs GRO que han sido convertidos por XLAT, ya que XLAT solo traduce la cabecera del skb principal. Consecuentemente, los skbs en el frag_list pueden permanecer sin traducir, lo que resulta en inconsistencias de protocolo y un rendimiento reducido.\n\nPara abordar esto, el parche establece expl\u00edcitamente el flag SKB_GSO_DODGY para paquetes GSO en los helpers de traducci\u00f3n de protocolo IPv4/IPv6 de XLAT (bpf_skb_proto_4_to_6 y bpf_skb_proto_6_to_4). Esto marca los paquetes GSO como potencialmente modificados despu\u00e9s de la traducci\u00f3n de protocolo. Como resultado, la segmentaci\u00f3n GSO evitar\u00e1 usar skb_segment_list y en su lugar recurrir\u00e1 a skb_segment para paquetes con el flag SKB_GSO_DODGY. Esto asegura que solo los paquetes frag_list seguros y completamente traducidos sean procesados por skb_segment_list, resolviendo inconsistencias de protocolo y mejorando el rendimiento al reenviar paquetes GRO convertidos por XLAT."}], "lastModified": "2026-03-25T11:16:19.400", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FC0CC93B-3AF5-44E4-8C46-C8C4910361E5", "versionEndExcluding": "6.12.69", "versionStartIncluding": "5.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "171CFCB2-8F49-4F9E-8A67-FAC6BF45B5A2", "versionEndExcluding": "6.18.9", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3EF854A1-ABB1-4E93-BE9A-44569EC76C0D"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}