{"cve":{"cve_id":"CVE-2026-53263","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"In the Linux kernel, the following vulnerability has been resolved:\n\n6lowpan: fix off-by-one in multicast context address compression\n\nThe second memcpy in lowpan_iphc_mcast_ctx_addr_compress() uses\n&data[1] as destination and &ipaddr->s6_addr[11] as source, but\nboth should be offset by one: &data[2] and &ipaddr->s6_addr[12]\nrespectively.\n\nThis off-by-one has two consequences:\n1. data[1] is overwritten with s6_addr[11], corrupting the RIID\n   field in the compressed multicast address\n2. data[5] is never written, so uninitialized kernel stack memory\n   is transmitted over the network via lowpan_push_hc_data(),\n   leaking kernel stack contents\n\nThe correct inline data layout must match what the decompression\nfunction lowpan_uncompress_multicast_ctx_daddr() expects:\n  data[0..1] = s6_addr[1..2]  (flags/scope + RIID)\n  data[2..5] = s6_addr[12..15] (group ID)\n\nAlso zero-initialize the data array as a defensive measure against\nsimilar bugs in the future.","published_at":"2026-06-25T08:39:51.215000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/f24a58c72a45f4c109f3557a760cc4b60b7a6037","https://git.kernel.org/stable/c/da8cbb64b47e9066b40af0de170901caf17b768c","https://git.kernel.org/stable/c/4485d79617520d84ba5a14515e2b5136007d6deb","https://git.kernel.org/stable/c/06ce6fc106b16dec9b535950db626261be865e5b","https://git.kernel.org/stable/c/dcb1bec1c32ee5c3878354e087cf5dbee2b7c7af","https://git.kernel.org/stable/c/c32f30ef5e66adbfa102348e2e8a23776eb007cb","https://git.kernel.org/stable/c/da8808463882c3f3c357b072e25053c2121f1419","https://git.kernel.org/stable/c/2a58899d11009bffc7b4b32a571858f381121837"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:28.590503Z","updated_at":"2026-06-28T23:30:51.545322Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5609c185f24dffca5f6a9c127106869da150be03","version_start_inclusive":true,"version_end":"f24a58c72a45f4c109f3557a760cc4b60b7a6037","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:5609c185f24dffca5f6a9c127106869da150be03:f24a58c72a45f4c109f3557a760cc4b60b7a6037"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5609c185f24dffca5f6a9c127106869da150be03","version_start_inclusive":true,"version_end":"da8cbb64b47e9066b40af0de170901caf17b768c","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:5609c185f24dffca5f6a9c127106869da150be03:da8cbb64b47e9066b40af0de170901caf17b768c"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5609c185f24dffca5f6a9c127106869da150be03","version_start_inclusive":true,"version_end":"4485d79617520d84ba5a14515e2b5136007d6deb","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:5609c185f24dffca5f6a9c127106869da150be03:4485d79617520d84ba5a14515e2b5136007d6deb"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5609c185f24dffca5f6a9c127106869da150be03","version_start_inclusive":true,"version_end":"06ce6fc106b16dec9b535950db626261be865e5b","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:5609c185f24dffca5f6a9c127106869da150be03:06ce6fc106b16dec9b535950db626261be865e5b"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5609c185f24dffca5f6a9c127106869da150be03","version_start_inclusive":true,"version_end":"dcb1bec1c32ee5c3878354e087cf5dbee2b7c7af","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:5609c185f24dffca5f6a9c127106869da150be03:dcb1bec1c32ee5c3878354e087cf5dbee2b7c7af"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5609c185f24dffca5f6a9c127106869da150be03","version_start_inclusive":true,"version_end":"c32f30ef5e66adbfa102348e2e8a23776eb007cb","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:5609c185f24dffca5f6a9c127106869da150be03:c32f30ef5e66adbfa102348e2e8a23776eb007cb"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5609c185f24dffca5f6a9c127106869da150be03","version_start_inclusive":true,"version_end":"da8808463882c3f3c357b072e25053c2121f1419","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:5609c185f24dffca5f6a9c127106869da150be03:da8808463882c3f3c357b072e25053c2121f1419"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5609c185f24dffca5f6a9c127106869da150be03","version_start_inclusive":true,"version_end":"2a58899d11009bffc7b4b32a571858f381121837","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:5609c185f24dffca5f6a9c127106869da150be03:2a58899d11009bffc7b4b32a571858f381121837"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"4.6","version_start_inclusive":true,"version_end":"4.6","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:4.6:4.6"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"4.6","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:4.6"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.10.259","version_start_inclusive":true,"version_end":"5.10.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.10.259:5.10.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.15.210","version_start_inclusive":true,"version_end":"5.15.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.15.210:5.15.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.1.176","version_start_inclusive":true,"version_end":"6.1.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.1.176:6.1.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.6.143","version_start_inclusive":true,"version_end":"6.6.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.6.143:6.6.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.94","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.94:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.36","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.36:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.13","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.13:7.0.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/f24a58c72a45f4c109f3557a760cc4b60b7a6037","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/da8cbb64b47e9066b40af0de170901caf17b768c","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/4485d79617520d84ba5a14515e2b5136007d6deb","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/06ce6fc106b16dec9b535950db626261be865e5b","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/dcb1bec1c32ee5c3878354e087cf5dbee2b7c7af","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/c32f30ef5e66adbfa102348e2e8a23776eb007cb","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/da8808463882c3f3c357b072e25053c2121f1419","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/2a58899d11009bffc7b4b32a571858f381121837","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-25T08:39:51.215000Z","label":"CVE published","source":null}]}