{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-53265 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-53265 is a high-severity vulnerability in Linux kernel, published on 25 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-2026-53265 and fix it if it is affected.\n\nWhat it is: CVE-2026-53265 is a high-severity vulnerability in Linux kernel, published on 25 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-2026-53265 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-2026-53265/ (Markdown: https://insights.sbomify.com/CVE-2026-53265/index.md)","id":"CVE-2026-53265","markdown":"https://insights.sbomify.com/CVE-2026-53265/index.md","name":"CVE-2026-53265","record":{"aliases":["AZL-90977","BELL-CVE-2026-53265","DEBIAN-CVE-2026-53265","GHSA-257g-7vrp-j9f8","ROOT-OS-DEBIAN-12-CVE-2026-53265","ROOT-OS-UBUNTU-2204-CVE-2026-53265","ROOT-OS-UBUNTU-2404-CVE-2026-53265","UBUNTU-CVE-2026-53265"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A race condition in the Linux kernel's dm cache policy allows concurrent invalidators to corrupt data structures, potentially causing crashes or data corruption.","user_interaction":"not_required","vuln_class":"race_condition"},"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-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm cache policy smq: check allocation under invalidate lock\n\ncommit 2d1f7b65f5de (\"dm cache policy smq: fix missing locks in\ninvalidating cache blocks\") added mq-\u003elock around the destructive part of\nsmq_invalidate_mapping(), but left the e-\u003eallocated check outside the\ncritical section.\n\nThat leaves a check-then-act race. Two concurrent invalidators can both\nobserve e-\u003eallocated as true before either of them takes mq-\u003elock. The\nfirst invalidator that acquires the lock removes the entry from the\nqueues and hash table and then calls free_entry(), which clears\ne-\u003eallocated and puts the entry back on the free list. The second\ninvalidator can then acquire mq-\u003elock and continue with the stale result\nof the unlocked check.\n\nThis can corrupt the SMQ queues or hash table by deleting an entry that\nis no longer on those structures. It can also hit the allocation check in\nfree_entry() when the same entry is freed again.\n\nMove the allocation check under mq-\u003elock so the predicate and the\ndestructive operations are serialized by the same lock.","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":"dm cache policy smq: check allocation under invalidate lock","id":"CVE-2026-53265","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"race_condition","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266"},"packages":[],"prev":{"headline":"net/sched: act_api: use RCU with deferred freeing for action lifecycle","id":"CVE-2026-53264"},"products":["Linux"],"published":"2026-06-25","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 race condition in the Linux kernel's dm cache policy allows concurrent invalidators to corrupt data structures, potentially causing crashes or data corruption.","url":"https://insights.sbomify.com/CVE-2026-53265/"}