{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-53085 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-53085 is a high-severity use after free 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-2026-53085 and fix it if it is affected.\n\nWhat it is: CVE-2026-53085 is a high-severity use after free 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-2026-53085 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-2026-53085/ (Markdown: https://insights.sbomify.com/CVE-2026-53085/index.md)","id":"CVE-2026-53085","markdown":"https://insights.sbomify.com/CVE-2026-53085/index.md","name":"CVE-2026-53085","record":{"aliases":["BELL-CVE-2026-53085","DEBIAN-CVE-2026-53085","GHSA-44fh-c439-xq8f","ROOT-OS-UBUNTU-2404-CVE-2026-53085","UBUNTU-CVE-2026-53085"],"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 BPF task_vma iterator allows attackers to execute arbitrary code or escalate privileges via concurrent task exit.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"},{"id":"CWE-825","name":"Expired Pointer Dereference"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix mm lifecycle in open-coded task_vma iterator\n\nThe open-coded task_vma iterator reads task-\u003emm locklessly and acquires\nmmap_read_trylock() but never calls mmget(). If the task exits\nconcurrently, the mm_struct can be freed as it is not\nSLAB_TYPESAFE_BY_RCU, resulting in a use-after-free.\n\nSafely read task-\u003emm with a trylock on alloc_lock and acquire an mm\nreference. Drop the reference via bpf_iter_mmput_async() in _destroy()\nand error paths. bpf_iter_mmput_async() is a local wrapper around\nmmput_async() with a fallback to mmput() on !CONFIG_MMU.\n\nReject irqs-disabled contexts (including NMI) up front. Operations used\nby _next() and _destroy() (mmap_read_unlock, bpf_iter_mmput_async)\ntake spinlocks with IRQs disabled (pool-\u003elock, pi_lock). Running from\nNMI or from a tracepoint that fires with those locks held could\ndeadlock.\n\nA trylock on alloc_lock is used instead of the blocking task_lock()\n(get_task_mm) to avoid a deadlock when a softirq BPF program iterates\na task that already holds its alloc_lock on the same CPU.","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":"bpf: fix mm lifecycle in open-coded task_vma iterator","id":"CVE-2026-53085","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"net: bcmgenet: fix racing timeout handler","id":"CVE-2026-53086"},"packages":[],"prev":{"headline":"bpf: return VMA snapshot from task_vma iterator","id":"CVE-2026-53084"},"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)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"A use-after-free in the Linux kernel BPF task_vma iterator allows attackers to execute arbitrary code or escalate privileges via concurrent task exit.","url":"https://insights.sbomify.com/CVE-2026-53085/"}