{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-99126 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-99126 is a vulnerability in Linux, published on 28 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-99126 and fix it if it is affected.\n\nWhat it is: CVE-2026-99126 is a vulnerability in Linux, published on 28 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-99126 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-2026-99126/ (Markdown: https://insights.sbomify.com/CVE-2026-99126/index.md)","id":"CVE-2026-99126","markdown":"https://insights.sbomify.com/CVE-2026-99126/index.md","name":"CVE-2026-99126","record":{"aliases":["AZL-111233","BELL-CVE-2026-99126","DEBIAN-CVE-2026-99126","GHSA-pcv7-392q-p29w","UBUNTU-CVE-2026-99126"],"analysis":null,"analysis_generated_by":null,"assigner":"Linux","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/ctcm: Prevent XID null dereference\n\nThe mpc_validate_xid() function sets grp-\u003esaved_xid2-\u003exid2_flag2 to 0x40\nto signal XID validation error. If peer XID is NULL or r/w channel\npairing mismatch happens, grp-\u003esaved_xid2 is never initialized. An\nattempt to set the flag in such case leads to NULL dereference.\n\nFix this by using the always available priv-\u003exid-\u003exid2_flag2 instead of\ngrp-\u003esaved_xid2-\u003exid2_flag2 for validation errors.","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/ctcm: Prevent XID null dereference","id":"CVE-2026-99126","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"page_pool: keep frag_offset aligned for odd-sized requests","id":"CVE-2026-99127"},"packages":[],"prev":{"headline":"s390/pai: Handle multiple PMU stop callback invocations","id":"CVE-2026-99125"},"products":["Linux"],"published":"2026-10-28","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-28","vendors":["Linux"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-99126/"}