{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-45981 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-45981 is a medium-severity use after free vulnerability in Linux kernel, published on 27 May 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-2026-45981 and fix it if it is affected.\n\nWhat it is: CVE-2026-45981 is a medium-severity use after free vulnerability in Linux kernel, published on 27 May 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-2026-45981 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-2026-45981/ (Markdown: https://insights.sbomify.com/CVE-2026-45981/index.md)","id":"CVE-2026-45981","markdown":"https://insights.sbomify.com/CVE-2026-45981/index.md","name":"CVE-2026-45981","record":{"aliases":["BELL-CVE-2026-45981","DEBIAN-CVE-2026-45981","GHSA-w3x6-6f6f-54f3","ROOT-OS-DEBIAN-11-CVE-2026-45981","ROOT-OS-UBUNTU-2204-CVE-2026-45981","ROOT-OS-UBUNTU-2404-CVE-2026-45981","UBUNTU-CVE-2026-45981"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel s390 channel I/O subsystem allows attackers to potentially execute code or cause a denial of service.","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":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/cio: Fix device lifecycle handling in css_alloc_subchannel()\n\n`css_alloc_subchannel()` calls `device_initialize()` before setting up\nthe DMA masks. If `dma_set_coherent_mask()` or `dma_set_mask()` fails,\nthe error path frees the subchannel structure directly, bypassing\nthe device model reference counting.\n\nOnce `device_initialize()` has been called, the embedded struct device\nmust be released via `put_device()`, allowing the release callback to\nfree the container structure.\n\nFix the error path by dropping the initial device reference with\n`put_device()` instead of calling `kfree()` directly.\n\nThis ensures correct device lifetime handling and avoids potential\nuse-after-free or double-free issues.","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":"s390/cio: Fix device lifecycle handling in css_alloc_subchannel()","id":"CVE-2026-45981","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":5,"next":{"headline":"ACPICA: Fix NULL pointer dereference in acpi_ev_address_space_dispatch()","id":"CVE-2026-45982"},"packages":[],"prev":{"headline":"accel/amdxdna: Stop job scheduling across aie2_release_resource()","id":"CVE-2026-45980"},"products":["Linux"],"published":"2026-05-27","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":"2026-06-01","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel s390 channel I/O subsystem allows attackers to potentially execute code or cause a denial of service.","url":"https://insights.sbomify.com/CVE-2026-45981/"}