{"cve":{"cve_id":"CVE-2026-53075","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\nppp: require CAP_NET_ADMIN in target netns for unattached ioctls\n\n/dev/ppp open is currently authorized against file->f_cred->user_ns,\nwhile unattached administrative ioctls operate on current->nsproxy->net_ns.\n\nAs a result, a local unprivileged user can create a new user namespace\nwith CLONE_NEWUSER, gain CAP_NET_ADMIN only in that new user namespace,\nand still issue PPPIOCNEWUNIT, PPPIOCATTACH, or PPPIOCATTCHAN against\nan inherited network namespace.\n\nRequire CAP_NET_ADMIN in the user namespace that owns the target network\nnamespace before handling unattached PPP administrative ioctls.\n\nThis preserves normal pppd operation in the network namespace it is\nactually privileged in, while rejecting the userns-only inherited-netns\ncase.","published_at":"2026-06-24T16:30:16.214000Z","last_modified_at":null,"cvss_v3_score":8.8,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvss_v3_severity":"HIGH","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/c9edd90c57ae23692fff6b049fdfa4572a9fd532","https://git.kernel.org/stable/c/5080e188c914110034bbc569d5cfa2f06204681d","https://git.kernel.org/stable/c/67e901e28d177ac9a9bed76d69ce3471e704a89e","https://git.kernel.org/stable/c/954745d0223e7caec917c0b2d1a889ff56fa6e54","https://git.kernel.org/stable/c/3b2c2157dc2afc5c17cd7238afefca92f1ef330e","https://git.kernel.org/stable/c/5013be175c7ffd8b39efbc3c9c4db5b10b85fea8","https://git.kernel.org/stable/c/1a8a51ce85075a56a743b6f142606dd2696a391c","https://git.kernel.org/stable/c/2bb6379416fd19f44c3423a00bfd8626259f6067"],"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":"2026-06-28T23:30:50.753831Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"273ec51dd7ceaa76e038875d85061ec856d8905e","version_start_inclusive":true,"version_end":"c9edd90c57ae23692fff6b049fdfa4572a9fd532","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:273ec51dd7ceaa76e038875d85061ec856d8905e:c9edd90c57ae23692fff6b049fdfa4572a9fd532"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"273ec51dd7ceaa76e038875d85061ec856d8905e","version_start_inclusive":true,"version_end":"5080e188c914110034bbc569d5cfa2f06204681d","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:273ec51dd7ceaa76e038875d85061ec856d8905e:5080e188c914110034bbc569d5cfa2f06204681d"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"273ec51dd7ceaa76e038875d85061ec856d8905e","version_start_inclusive":true,"version_end":"67e901e28d177ac9a9bed76d69ce3471e704a89e","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:273ec51dd7ceaa76e038875d85061ec856d8905e:67e901e28d177ac9a9bed76d69ce3471e704a89e"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"273ec51dd7ceaa76e038875d85061ec856d8905e","version_start_inclusive":true,"version_end":"954745d0223e7caec917c0b2d1a889ff56fa6e54","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:273ec51dd7ceaa76e038875d85061ec856d8905e:954745d0223e7caec917c0b2d1a889ff56fa6e54"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"273ec51dd7ceaa76e038875d85061ec856d8905e","version_start_inclusive":true,"version_end":"3b2c2157dc2afc5c17cd7238afefca92f1ef330e","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:273ec51dd7ceaa76e038875d85061ec856d8905e:3b2c2157dc2afc5c17cd7238afefca92f1ef330e"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"273ec51dd7ceaa76e038875d85061ec856d8905e","version_start_inclusive":true,"version_end":"5013be175c7ffd8b39efbc3c9c4db5b10b85fea8","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:273ec51dd7ceaa76e038875d85061ec856d8905e:5013be175c7ffd8b39efbc3c9c4db5b10b85fea8"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"273ec51dd7ceaa76e038875d85061ec856d8905e","version_start_inclusive":true,"version_end":"1a8a51ce85075a56a743b6f142606dd2696a391c","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:273ec51dd7ceaa76e038875d85061ec856d8905e:1a8a51ce85075a56a743b6f142606dd2696a391c"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"273ec51dd7ceaa76e038875d85061ec856d8905e","version_start_inclusive":true,"version_end":"2bb6379416fd19f44c3423a00bfd8626259f6067","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:273ec51dd7ceaa76e038875d85061ec856d8905e:2bb6379416fd19f44c3423a00bfd8626259f6067"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"2.6.30","version_start_inclusive":true,"version_end":"2.6.30","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:2.6.30:2.6.30"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"2.6.30","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:2.6.30"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.10.258","version_start_inclusive":true,"version_end":"5.10.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.10.258:5.10.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.15.209","version_start_inclusive":true,"version_end":"5.15.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.15.209:5.15.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.1.175","version_start_inclusive":true,"version_end":"6.1.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.1.175:6.1.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.6.141","version_start_inclusive":true,"version_end":"6.6.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.6.141:6.6.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.91","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.91:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.33","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.33:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.10","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.10:7.0.*"},{"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/c9edd90c57ae23692fff6b049fdfa4572a9fd532","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/5080e188c914110034bbc569d5cfa2f06204681d","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/67e901e28d177ac9a9bed76d69ce3471e704a89e","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/954745d0223e7caec917c0b2d1a889ff56fa6e54","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/3b2c2157dc2afc5c17cd7238afefca92f1ef330e","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/5013be175c7ffd8b39efbc3c9c4db5b10b85fea8","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/1a8a51ce85075a56a743b6f142606dd2696a391c","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/2bb6379416fd19f44c3423a00bfd8626259f6067","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-24T16:30:16.214000Z","label":"CVE published","source":null}]}