{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-53075 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-53075 is a high-severity vulnerability in Linux kernel, published on 24 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-53075 and fix it if it is affected.\n\nWhat it is: CVE-2026-53075 is a high-severity vulnerability in Linux kernel, published on 24 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-53075 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-53075/ (Markdown: https://insights.sbomify.com/CVE-2026-53075/index.md)","id":"CVE-2026-53075","markdown":"https://insights.sbomify.com/CVE-2026-53075/index.md","name":"CVE-2026-53075","record":{"aliases":["BELL-CVE-2026-53075","DEBIAN-CVE-2026-53075","GHSA-v495-j4w2-68hc","ROOT-OS-DEBIAN-11-CVE-2026-53075","ROOT-OS-DEBIAN-12-CVE-2026-53075","ROOT-OS-UBUNTU-2204-CVE-2026-53075","ROOT-OS-UBUNTU-2404-CVE-2026-53075","UBUNTU-CVE-2026-53075"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel PPP","requires_auth":"low_privilege","summary":"Local attackers can escalate privileges by exploiting PPP ioctl checks to bypass network namespace restrictions using user namespaces.","user_interaction":"not_required","vuln_class":"privilege_escalation"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"}],"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-\u003ef_cred-\u003euser_ns,\nwhile unattached administrative ioctls operate on current-\u003ensproxy-\u003enet_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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-04-03","github_poc":2,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-04-03T05:26:09Z","kind":"github_poc","ref":"https://github.com/foxirain/linux-kernel-codex-harness-v2","stars":0,"title":"Provenance-aware Linux kernel vulnerability research harness used in the investigation of CVE-2026-53075"},{"date":"2026-06-25T02:32:06Z","kind":"github_poc","ref":"https://github.com/lottiedeyan/CVE-2026-53075poc","stars":0,"title":"POC of CVE-2026-53075"}],"tier":"poc_unverified"},"has_fix":true,"headline":"ppp: require CAP_NET_ADMIN in target netns for unattached ioctls","id":"CVE-2026-53075","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"privilege_escalation","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"bpf: Fix OOB in pcpu_init_value","id":"CVE-2026-53076"},"packages":[],"prev":{"headline":"bpf: reject short IPv4/IPv6 inputs in bpf_prog_test_run_skb","id":"CVE-2026-53074"},"products":["Linux"],"published":"2026-06-24","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"Local attackers can escalate privileges by exploiting PPP ioctl checks to bypass network namespace restrictions using user namespaces.","url":"https://insights.sbomify.com/CVE-2026-53075/"}