{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-53276 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-53276 is a high-severity use after free 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-2026-53276 and fix it if it is affected.\n\nWhat it is: CVE-2026-53276 is a high-severity use after free 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-2026-53276 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-2026-53276/ (Markdown: https://insights.sbomify.com/CVE-2026-53276/index.md)","id":"CVE-2026-53276","markdown":"https://insights.sbomify.com/CVE-2026-53276/index.md","name":"CVE-2026-53276","record":{"aliases":["DEBIAN-CVE-2026-53276","GHSA-h5cp-pgfw-22wh","UBUNTU-CVE-2026-53276"],"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 Bluetooth","requires_auth":"low_privilege","summary":"A use-after-free in the Linux kernel Bluetooth ISO subsystem allows attackers to potentially execute code or escalate privileges via concurrent socket operations.","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"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: Fix a use-after-free of the hci_conn pointer\n\nIn iso_sock_rebind_bc(), the bis pointer is cached, then the socket lock is\ndropped:\n\tbis = iso_pi(sk)-\u003econn-\u003ehcon;\n\t/* Release the socket before lookups since that requires hci_dev_lock\n\t * which shall not be acquired while holding sock_lock for proper\n\t * ordering.\n\t */\n\trelease_sock(sk);\n\thci_dev_lock(bis-\u003ehdev);\n\nDuring the unlocked window, could a concurrent close() destroy the connection\nand free the bis structure, causing hci_dev_lock(bis-\u003ehdev) to access memory\nafter it is freed, fix this by using the hdev reference which was safely\nacquired via iso_conn_get_hdev().","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":"Bluetooth: ISO: Fix a use-after-free of the hci_conn pointer","id":"CVE-2026-53276","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":2,"next":{"headline":"KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation","id":"CVE-2026-53277"},"packages":[],"prev":{"headline":"ipv6: mcast: Fix use-after-free when processing MLD queries","id":"CVE-2026-53275"},"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A use-after-free in the Linux kernel Bluetooth ISO subsystem allows attackers to potentially execute code or escalate privileges via concurrent socket operations.","url":"https://insights.sbomify.com/CVE-2026-53276/"}