{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-31409 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-31409 is a high-severity vulnerability in Linux kernel, published on 6 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-31409 and fix it if it is affected.\n\nWhat it is: CVE-2026-31409 is a high-severity vulnerability in Linux kernel, published on 6 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-31409 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-2026-31409/ (Markdown: https://insights.sbomify.com/CVE-2026-31409/index.md)","id":"CVE-2026-31409","markdown":"https://insights.sbomify.com/CVE-2026-31409/index.md","name":"CVE-2026-31409","record":{"aliases":["BELL-CVE-2026-31409","DEBIAN-CVE-2026-31409","GHSA-5qj3-gjq7-62fm","ROOT-OS-DEBIAN-11-CVE-2026-31409","ROOT-OS-DEBIAN-12-CVE-2026-31409","ROOT-OS-DEBIAN-13-CVE-2026-31409","ROOT-OS-UBUNTU-2204-CVE-2026-31409","ROOT-OS-UBUNTU-2404-CVE-2026-31409","UBUNTU-CVE-2026-31409"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel SMB server","requires_auth":"low_privilege","summary":"A logic error in the Linux kernel's ksmbd server fails to reset a binding flag, potentially allowing unauthorized access to session data.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/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\nksmbd: unset conn-\u003ebinding on failed binding request\n\nWhen a multichannel SMB2_SESSION_SETUP request with\nSMB2_SESSION_REQ_FLAG_BINDING fails ksmbd sets conn-\u003ebinding = true\nbut never clears it on the error path. This leaves the connection in\na binding state where all subsequent ksmbd_session_lookup_all() calls\nfall back to the global sessions table. This fix it by clearing\nconn-\u003ebinding = false in the error path.","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":"ksmbd: unset conn-\u003ebinding on failed binding request","id":"CVE-2026-31409","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"other","year":"2026"},"n_packages":0,"n_references":7,"next":{"headline":"ksmbd: use volume UUID in FS_OBJECT_ID_INFORMATION","id":"CVE-2026-31410"},"packages":[],"prev":{"headline":"Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold","id":"CVE-2026-31408"},"products":["Linux"],"published":"2026-04-06","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":"2026-08-05","vendors":["Linux"]},"summary":"A logic error in the Linux kernel's ksmbd server fails to reset a binding flag, potentially allowing unauthorized access to session data.","url":"https://insights.sbomify.com/CVE-2026-31409/"}