{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-72431 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-72431 is an use after free vulnerability in Linux, published on 15 Aug 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-2026-72431 and fix it if it is affected.\n\nWhat it is: CVE-2026-72431 is an use after free vulnerability in Linux, published on 15 Aug 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-2026-72431 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-2026-72431/ (Markdown: https://insights.sbomify.com/CVE-2026-72431/index.md)","id":"CVE-2026-72431","markdown":"https://insights.sbomify.com/CVE-2026-72431/index.md","name":"CVE-2026-72431","record":{"aliases":["BELL-CVE-2026-72431","DEBIAN-CVE-2026-72431","GHSA-pcf6-jjpm-2jrr","UBUNTU-CVE-2026-72431"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A use-after-free in the Linux kernel's allocinfo interface allows local attackers to execute code or escalate privileges after module unload.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nalloc_tag: fix use-after-free in /proc/allocinfo after module unload\n\nallocinfo_start() only reinitializes the codetag iterator at position 0. \nFor subsequent reads (position \u003e 0), it reuses cached iterator state from\nthe previous batch.  allocinfo_stop() drops mod_lock between read batches,\nwhich allows module unload to complete and free the module memory that the\ncached iterator still references:\n\n  CPU0 (read)                        CPU1 (rmmod)\n  ----                               ----\n  allocinfo_start(pos=0)\n    down_read(mod_lock)\n    allocinfo_show()\n    ...\n  allocinfo_stop()\n    up_read(mod_lock)\n                                     codetag_unload_module()\n                                       kfree(cmod)\n                                       release_module_tags()\n                                     ...\n                                     free_mod_mem()\n  allocinfo_start(pos=N)\n    down_read(mod_lock)\n    // reuses cached iter, skips re-init\n  allocinfo_show()\n    ct-\u003efilename   \u003c-- UAF\n\nAfter free_mod_mem() frees the module's .rodata, allocinfo_show()\ndereferences ct-\u003efilename, ct-\u003efunction which point there.\n\nSave the iterator state in allocinfo_next() and resume from it in\nallocinfo_start() with codetag_next_ct(), which detects module removal via\nidr_find() returning NULL and skips to the next module.","ecosystems":[],"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":"alloc_tag: fix use-after-free in /proc/allocinfo after module unload","id":"CVE-2026-72431","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"tpm_crb: Check ACPI_COMPANION() against NULL during probe","id":"CVE-2026-72432"},"packages":[],"prev":{"headline":"net/sched: act_ct: fix nf_connlabels leak on two error paths","id":"CVE-2026-72430"},"products":["Linux"],"published":"2026-08-15","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-08-17","vendors":["Linux"]},"summary":"A use-after-free in the Linux kernel's allocinfo interface allows local attackers to execute code or escalate privileges after module unload.","url":"https://insights.sbomify.com/CVE-2026-72431/"}