{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-74581 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-74581 is a critical use after free vulnerability in Linux, published on 21 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-2026-74581 and fix it if it is affected.\n\nWhat it is: CVE-2026-74581 is a critical use after free vulnerability in Linux, published on 21 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-2026-74581 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-2026-74581/ (Markdown: https://insights.sbomify.com/CVE-2026-74581/index.md)","id":"CVE-2026-74581","markdown":"https://insights.sbomify.com/CVE-2026-74581/index.md","name":"CVE-2026-74581","record":{"aliases":["AZL-97001","BELL-CVE-2026-74581","DEBIAN-CVE-2026-74581","GHSA-7ph7-58w3-w755","RHSA-2026:59994","RHSA-2026:60437","RHSA-2026:60438","RHSA-2026:60485","UBUNTU-CVE-2026-74581"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel","requires_auth":"none","summary":"A use-after-free in the Linux kernel IPv6 routing code allows attackers to cause a denial of service or potentially execute code via crafted network traffic.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv6: clear suppressed fib6 rule result\n\nfib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(),\nbut leaves res-\u003ert6 pointing at the released rt6_info.\n\nIf no later rule supplies a replacement, fib6_rule_lookup() still sees\nres.rt6 and returns that stale dst to its caller. A suppressing rule can\ntherefore leak a released route back to rt6_lookup(), and the next put\nhits rcuref_put_slowpath() from dst_release().\n\nClear res-\u003ert6 when suppressing the route so suppressed lookups fall\nthrough to the null dst instead of reusing the released one.","ecosystems":["Red Hat:rhel_aus:8.4::baseos","Red Hat:rhel_aus:8.6::baseos","Red Hat:rhel_e4s:9.2::appstream","Red Hat:rhel_e4s:9.2::baseos","Red Hat:rhel_e4s:9.2::nfv","Red Hat:rhel_e4s:9.2::realtime","Red Hat:rhel_eus_long_life:8.4::baseos","Red Hat:rhel_eus_long_life:8.6::baseos"],"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":"net: ipv6: clear suppressed fib6 rule result","id":"CVE-2026-74581","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":199,"n_references":8,"next":{"headline":"packet: use consistent hard_header_len in non-ring send paths","id":"CVE-2026-74582"},"packages":[{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"bpftool","purl":"pkg:rpm/redhat/bpftool","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"bpftool-debuginfo","purl":"pkg:rpm/redhat/bpftool-debuginfo","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel","purl":"pkg:rpm/redhat/kernel","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-abi-stablelists","purl":"pkg:rpm/redhat/kernel-abi-stablelists","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-core","purl":"pkg:rpm/redhat/kernel-core","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debug","purl":"pkg:rpm/redhat/kernel-debug","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-core","purl":"pkg:rpm/redhat/kernel-debug-core","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-debuginfo","purl":"pkg:rpm/redhat/kernel-debug-debuginfo","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-devel","purl":"pkg:rpm/redhat/kernel-debug-devel","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-modules","purl":"pkg:rpm/redhat/kernel-debug-modules","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-modules-extra","purl":"pkg:rpm/redhat/kernel-debug-modules-extra","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo","purl":"pkg:rpm/redhat/kernel-debuginfo","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-x86_64","purl":"pkg:rpm/redhat/kernel-debuginfo-common-x86_64","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-devel","purl":"pkg:rpm/redhat/kernel-devel","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-doc","purl":"pkg:rpm/redhat/kernel-doc","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-modules","purl":"pkg:rpm/redhat/kernel-modules","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-modules-extra","purl":"pkg:rpm/redhat/kernel-modules-extra","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-tools","purl":"pkg:rpm/redhat/kernel-tools","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-tools-debuginfo","purl":"pkg:rpm/redhat/kernel-tools-debuginfo","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-tools-libs","purl":"pkg:rpm/redhat/kernel-tools-libs","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"perf","purl":"pkg:rpm/redhat/perf","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"perf-debuginfo","purl":"pkg:rpm/redhat/perf-debuginfo","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3-perf","purl":"pkg:rpm/redhat/python3-perf","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.4::baseos","fixed":["0:4.18.0-305.202.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3-perf-debuginfo","purl":"pkg:rpm/redhat/python3-perf-debuginfo","source":"RHSA-2026:59994"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"bpftool","purl":"pkg:rpm/redhat/bpftool","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"bpftool-debuginfo","purl":"pkg:rpm/redhat/bpftool-debuginfo","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel","purl":"pkg:rpm/redhat/kernel","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel-abi-stablelists","purl":"pkg:rpm/redhat/kernel-abi-stablelists","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel-core","purl":"pkg:rpm/redhat/kernel-core","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel-debug","purl":"pkg:rpm/redhat/kernel-debug","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-core","purl":"pkg:rpm/redhat/kernel-debug-core","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-debuginfo","purl":"pkg:rpm/redhat/kernel-debug-debuginfo","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-devel","purl":"pkg:rpm/redhat/kernel-debug-devel","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-modules","purl":"pkg:rpm/redhat/kernel-debug-modules","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-modules-extra","purl":"pkg:rpm/redhat/kernel-debug-modules-extra","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo","purl":"pkg:rpm/redhat/kernel-debuginfo","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-x86_64","purl":"pkg:rpm/redhat/kernel-debuginfo-common-x86_64","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel-devel","purl":"pkg:rpm/redhat/kernel-devel","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel-doc","purl":"pkg:rpm/redhat/kernel-doc","source":"RHSA-2026:60485"},{"ecosystem":"Red Hat:rhel_aus:8.6::baseos","fixed":["0:4.18.0-372.209.1.el8_6"],"introduced":["0"],"last_affected":[],"package":"kernel-modules","purl":"pkg:rpm/redhat/kernel-modules","source":"RHSA-2026:60485"}],"prev":{"headline":"vhost: reset the vring metadata cache on vring reconfiguration","id":"CVE-2026-74580"},"products":["Linux"],"published":"2026-08-21","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 the Linux kernel IPv6 routing code allows attackers to cause a denial of service or potentially execute code via crafted network traffic.","url":"https://insights.sbomify.com/CVE-2026-74581/"}