{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-74480 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-74480 is a critical use after free vulnerability in Linux, published on 15 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-2026-74480 and fix it if it is affected.\n\nWhat it is: CVE-2026-74480 is a critical use after free vulnerability in Linux, published on 15 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-2026-74480 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-2026-74480/ (Markdown: https://insights.sbomify.com/CVE-2026-74480/index.md)","id":"CVE-2026-74480","markdown":"https://insights.sbomify.com/CVE-2026-74480/index.md","name":"CVE-2026-74480","record":{"aliases":["ALSA-2026:66355","AZL-96423","BELL-CVE-2026-74480","DEBIAN-CVE-2026-74480","GHSA-98rv-7h6m-5q72","RHSA-2026:61973","RHSA-2026:62345","RHSA-2026:62372","RHSA-2026:63538","RHSA-2026:63539","RHSA-2026:66355","RLSA-2026:66355","UBUNTU-CVE-2026-74480"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"Linux kernel bridge","requires_auth":"none","summary":"A use-after-free in the Linux kernel bridge multicast code allows attackers to cause a denial of service or potentially execute code when fast-leave is enabled.","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: bridge: stop fast-leave after deleting a port group\n\nbr_multicast_leave_group() iterates mp-\u003eports with pp = \u0026p-\u003enext in\nits fast-leave path. After br_multicast_del_pg() removes p,\ncontinuing the loop advances pp through the deleted entry.\n\nIf multicast-to-unicast was enabled, the bridge can hold multiple port\ngroups for the same port and group with different source MAC\naddresses. Once multicast-to-unicast is disabled,\nbr_port_group_equal() matches those entries by port only. A fast leave\ncan then delete one entry and continue from its stale next pointer,\nleaving mp-\u003eports pointing at a deleted port group.\n\nFast leave only needs to remove one matching port group. Break after\nbr_multicast_del_pg() so the loop stops before dereferencing the\nremoved entry.","ecosystems":["AlmaLinux:10","Red Hat:enterprise_linux:10.2","Red Hat:rhel_aus:8.4::baseos","Red Hat:rhel_aus:8.6::baseos","Red Hat:rhel_e4s:8.8::baseos","Red Hat:rhel_els:7","Red Hat:rhel_eus_long_life:8.4::baseos","Red Hat:rhel_eus_long_life:8.6::baseos","Red Hat:rhel_extras_rt_els:7","Red Hat:rhel_tus:8.8::baseos","Rocky Linux:10"],"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: bridge: stop fast-leave after deleting a port group","id":"CVE-2026-74480","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":348,"n_references":8,"next":{"headline":"mm/page_reporting: use system_freezable_wq to fix UAF during suspend","id":"CVE-2026-74481"},"packages":[{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel","purl":"pkg:rpm/almalinux/kernel","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k","purl":"pkg:rpm/almalinux/kernel-64k","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-core","purl":"pkg:rpm/almalinux/kernel-64k-core","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug","purl":"pkg:rpm/almalinux/kernel-64k-debug","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-core","purl":"pkg:rpm/almalinux/kernel-64k-debug-core","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-devel","purl":"pkg:rpm/almalinux/kernel-64k-debug-devel","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-devel-matched","purl":"pkg:rpm/almalinux/kernel-64k-debug-devel-matched","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-modules","purl":"pkg:rpm/almalinux/kernel-64k-debug-modules","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-modules-core","purl":"pkg:rpm/almalinux/kernel-64k-debug-modules-core","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-modules-extra","purl":"pkg:rpm/almalinux/kernel-64k-debug-modules-extra","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-devel","purl":"pkg:rpm/almalinux/kernel-64k-devel","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-devel-matched","purl":"pkg:rpm/almalinux/kernel-64k-devel-matched","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-modules","purl":"pkg:rpm/almalinux/kernel-64k-modules","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-modules-core","purl":"pkg:rpm/almalinux/kernel-64k-modules-core","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-modules-extra","purl":"pkg:rpm/almalinux/kernel-64k-modules-extra","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-abi-stablelists","purl":"pkg:rpm/almalinux/kernel-abi-stablelists","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-core","purl":"pkg:rpm/almalinux/kernel-core","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-cross-headers","purl":"pkg:rpm/almalinux/kernel-cross-headers","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug","purl":"pkg:rpm/almalinux/kernel-debug","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-core","purl":"pkg:rpm/almalinux/kernel-debug-core","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-devel","purl":"pkg:rpm/almalinux/kernel-debug-devel","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-devel-matched","purl":"pkg:rpm/almalinux/kernel-debug-devel-matched","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-modules","purl":"pkg:rpm/almalinux/kernel-debug-modules","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-modules-core","purl":"pkg:rpm/almalinux/kernel-debug-modules-core","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-modules-extra","purl":"pkg:rpm/almalinux/kernel-debug-modules-extra","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-uki-virt","purl":"pkg:rpm/almalinux/kernel-debug-uki-virt","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-devel","purl":"pkg:rpm/almalinux/kernel-devel","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-devel-matched","purl":"pkg:rpm/almalinux/kernel-devel-matched","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-doc","purl":"pkg:rpm/almalinux/kernel-doc","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-headers","purl":"pkg:rpm/almalinux/kernel-headers","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-modules","purl":"pkg:rpm/almalinux/kernel-modules","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-modules-core","purl":"pkg:rpm/almalinux/kernel-modules-core","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-modules-extra","purl":"pkg:rpm/almalinux/kernel-modules-extra","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-modules-extra-matched","purl":"pkg:rpm/almalinux/kernel-modules-extra-matched","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-rt","purl":"pkg:rpm/almalinux/kernel-rt","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-rt-64k","purl":"pkg:rpm/almalinux/kernel-rt-64k","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-rt-64k-core","purl":"pkg:rpm/almalinux/kernel-rt-64k-core","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-rt-64k-debug","purl":"pkg:rpm/almalinux/kernel-rt-64k-debug","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-rt-64k-debug-core","purl":"pkg:rpm/almalinux/kernel-rt-64k-debug-core","source":"ALSA-2026:66355"},{"ecosystem":"AlmaLinux:10","fixed":["6.12.0-211.54.1.el10_2"],"introduced":["0"],"last_affected":[],"package":"kernel-rt-64k-debug-devel","purl":"pkg:rpm/almalinux/kernel-rt-64k-debug-devel","source":"ALSA-2026:66355"}],"prev":{"headline":"net: pktgen: fix proc entry use-after-free","id":"CVE-2026-74479"},"products":["Linux"],"published":"2026-08-15","related":[],"sources":[{"class":"attribution","licence":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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 bridge multicast code allows attackers to cause a denial of service or potentially execute code when fast-leave is enabled.","url":"https://insights.sbomify.com/CVE-2026-74480/"}