{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-90423 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-90423 is a high-severity use after free vulnerability in Linux, published on 17 Sep 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-2026-90423 and fix it if it is affected.\n\nWhat it is: CVE-2026-90423 is a high-severity use after free vulnerability in Linux, published on 17 Sep 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-2026-90423 in the wild and no public exploit code.\n\nAffected product: Linux. 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-2026-90423/ (Markdown: https://insights.sbomify.com/CVE-2026-90423/index.md)","id":"CVE-2026-90423","markdown":"https://insights.sbomify.com/CVE-2026-90423/index.md","name":"CVE-2026-90423","record":{"aliases":["BELL-CVE-2026-90423","DEBIAN-CVE-2026-90423","GHSA-vg4x-c29w-66xm","UBUNTU-CVE-2026-90423"],"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 RDMA","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel's RDMA/rxe driver allows attackers to potentially execute code or escalate privileges via improper error handling in ODP initialization.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"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":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix UAF in ODP init error-handling path\n\nrxe_odp_mr_init_user() stores \u0026umem_odp-\u003eumem in mr-\u003eumem before\ncalling rxe_odp_init_pages(). If rxe_odp_init_pages() fails,\nrxe_odp_mr_init_user() releases umem_odp and returns an error.\n\nrxe_reg_user_mr() then unwinds the error through rxe_cleanup(),\nrxe_mr_cleanup(), ib_umem_release(mr-\u003eumem). There is an\nIS_ERR_OR_NULL(umem) check at the start of ib_umem_release().\nBut since mr-\u003eumem is NOT reset to NULL in the error handling\npath of rxe_odp_mr_init_user(), the check passes and it reads\nalready-freed fields like umem-\u003eis_dmabuf, causing UAF.\n\nFix the UAF by clearing mr-\u003eumem after releasing the failed\nODP umem so the MR cleanup path does not release it again.","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":"RDMA/rxe: Fix UAF in ODP init error-handling path","id":"CVE-2026-90423","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"iommu/tegra241-cmdqv: Fix VINTF0 leak on the init-failure path","id":"CVE-2026-90424"},"packages":[],"prev":{"headline":"clk: mediatek: pllfh: Fix IO remapping leak in register_pllfhs error path","id":"CVE-2026-90422"},"products":["Linux"],"published":"2026-09-17","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel's RDMA/rxe driver allows attackers to potentially execute code or escalate privileges via improper error handling in ODP initialization.","url":"https://insights.sbomify.com/CVE-2026-90423/"}