{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-74705 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-74705 is a critical use after free vulnerability in Linux, published on 22 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-74705 and fix it if it is affected.\n\nWhat it is: CVE-2026-74705 is a critical use after free vulnerability in Linux, published on 22 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-74705 in the wild and no public exploit code.\n\nAffected product: Linux. 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-2026-74705/ (Markdown: https://insights.sbomify.com/CVE-2026-74705/index.md)","id":"CVE-2026-74705","markdown":"https://insights.sbomify.com/CVE-2026-74705/index.md","name":"CVE-2026-74705","record":{"aliases":["AZL-97182","BELL-CVE-2026-74705","DEBIAN-CVE-2026-74705","GHSA-rcm8-q4cm-988v","RHSA-2026:79784","RHSA-2026:79786","UBUNTU-CVE-2026-74705"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel","requires_auth":"none","summary":"A use-after-free in Linux kernel UDP tunnel segmentation allows attackers to potentially execute code or escalate privileges.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":10,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nudp: fix potential use-after-free in tunnel segmentation\n\n__skb_udp_tunnel_segment() gets the UDP header before ensuring the\ntunnel header is in the skb head. If the pull reallocates skb-\u003ehead,\nthe saved UDP header pointer is no longer valid.\n\nGet the UDP header after the pull to avoid a potential use-after-free.","ecosystems":["Red Hat:rhel_e4s:9.4::appstream","Red Hat:rhel_e4s:9.4::baseos","Red Hat:rhel_e4s:9.4::nfv","Red Hat:rhel_e4s:9.4::realtime","Red Hat:rhel_eus:9.6::appstream","Red Hat:rhel_eus:9.6::baseos","Red Hat:rhel_eus:9.6::crb","Red Hat:rhel_eus:9.6::nfv","Red Hat:rhel_eus:9.6::realtime"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"udp: fix potential use-after-free in tunnel segmentation","id":"CVE-2026-74705","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":284,"n_references":8,"next":{"headline":"bnge: Fix NULL pointer dereference in aux device release","id":"CVE-2026-74706"},"packages":[{"ecosystem":"Red Hat:rhel_e4s:9.4::appstream","fixed":["0:7.3.0-427.155.1.el9_4"],"introduced":["0"],"last_affected":[],"package":"bpftool-debuginfo","purl":"pkg:rpm/redhat/bpftool-debuginfo","source":"RHSA-2026:79786"},{"ecosystem":"Red Hat:rhel_e4s:9.4::appstream","fixed":["0:5.14.0-427.155.1.el9_4"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-debuginfo","purl":"pkg:rpm/redhat/kernel-64k-debug-debuginfo","source":"RHSA-2026:79786"},{"ecosystem":"Red Hat:rhel_e4s:9.4::appstream","fixed":["0:5.14.0-427.155.1.el9_4"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-devel","purl":"pkg:rpm/redhat/kernel-64k-debug-devel","source":"RHSA-2026:79786"},{"ecosystem":"Red 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Hat:rhel_e4s:9.4::baseos","fixed":["0:5.14.0-427.155.1.el9_4"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug","purl":"pkg:rpm/redhat/kernel-64k-debug","source":"RHSA-2026:79786"},{"ecosystem":"Red Hat:rhel_e4s:9.4::baseos","fixed":["0:5.14.0-427.155.1.el9_4"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-core","purl":"pkg:rpm/redhat/kernel-64k-debug-core","source":"RHSA-2026:79786"},{"ecosystem":"Red Hat:rhel_e4s:9.4::baseos","fixed":["0:5.14.0-427.155.1.el9_4"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-debuginfo","purl":"pkg:rpm/redhat/kernel-64k-debug-debuginfo","source":"RHSA-2026:79786"},{"ecosystem":"Red Hat:rhel_e4s:9.4::baseos","fixed":["0:5.14.0-427.155.1.el9_4"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-modules","purl":"pkg:rpm/redhat/kernel-64k-debug-modules","source":"RHSA-2026:79786"},{"ecosystem":"Red Hat:rhel_e4s:9.4::baseos","fixed":["0:5.14.0-427.155.1.el9_4"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-modules-core","purl":"pkg:rpm/redhat/kernel-64k-debug-modules-core","source":"RHSA-2026:79786"}],"prev":{"headline":"net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter","id":"CVE-2026-74704"},"products":["Linux"],"published":"2026-08-22","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-16","vendors":["Linux"]},"summary":"A use-after-free in Linux kernel UDP tunnel segmentation allows attackers to potentially execute code or escalate privileges.","url":"https://insights.sbomify.com/CVE-2026-74705/"}