{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-39958 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-39958 is a high-severity denial of service vulnerability in Linux kernel, published on 9 Oct 2025. 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-2025-39958 and fix it if it is affected.\n\nWhat it is: CVE-2025-39958 is a high-severity denial of service vulnerability in Linux kernel, published on 9 Oct 2025. 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-2025-39958 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-2025-39958/ (Markdown: https://insights.sbomify.com/CVE-2025-39958/index.md)","id":"CVE-2025-39958","markdown":"https://insights.sbomify.com/CVE-2025-39958/index.md","name":"CVE-2025-39958","record":{"aliases":["BELL-CVE-2025-39958","DEBIAN-CVE-2025-39958","GHSA-p5vh-p63c-cg4v","ROOT-OS-DEBIAN-13-CVE-2025-39958","ROOT-OS-UBUNTU-2204-CVE-2025-39958","ROOT-OS-UBUNTU-2404-CVE-2025-39958","UBUNTU-CVE-2025-39958"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A flaw in the Linux kernel's s390 IOMMU driver causes a kernel warning and potential instability when attaching a surprise-removed PCI device.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/s390: Make attach succeed when the device was surprise removed\n\nWhen a PCI device is removed with surprise hotplug, there may still be\nattempts to attach the device to the default domain as part of tear down\nvia (__iommu_release_dma_ownership()), or because the removal happens\nduring probe (__iommu_probe_device()). In both cases zpci_register_ioat()\nfails with a cc value indicating that the device handle is invalid. This\nis because the device is no longer part of the instance as far as the\nhypervisor is concerned.\n\nCurrently this leads to an error return and s390_iommu_attach_device()\nfails. This triggers the WARN_ON() in __iommu_group_set_domain_nofail()\nbecause attaching to the default domain must never fail.\n\nWith the device fenced by the hypervisor no DMAs to or from memory are\npossible and the IOMMU translations have no effect. Proceed as if the\nregistration was successful and let the hotplug event handling clean up\nthe device.\n\nThis is similar to how devices in the error state are handled since\ncommit 59bbf596791b (\"iommu/s390: Make attach succeed even if the device\nis in error state\") except that for removal the domain will not be\nregistered later. This approach was also previously discussed at the\nlink.\n\nHandle both cases, error state and removal, in a helper which checks if\nthe error needs to be propagated or ignored. Avoid magic number\ncondition codes by using the pre-existing, but never used, defines for\nPCI load/store condition codes and rename them to reflect that they\napply to all PCI instructions.","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":"iommu/s390: Make attach succeed when the device was surprise removed","id":"CVE-2025-39958","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"denial_of_service","year":"2025"},"n_packages":0,"n_references":4,"next":{"headline":"ASoC: amd: acp: Fix incorrect retrival of acp_chip_info","id":"CVE-2025-39959"},"packages":[],"prev":{"headline":"wifi: mac80211: increase scan_ies_len for S1G","id":"CVE-2025-39957"},"products":["Linux"],"published":"2025-10-09","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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-21","vendors":["Linux"]},"summary":"A flaw in the Linux kernel's s390 IOMMU driver causes a kernel warning and potential instability when attaching a surprise-removed PCI device.","url":"https://insights.sbomify.com/CVE-2025-39958/"}