{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-31720 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-31720 is a high-severity memory corruption vulnerability in Linux kernel, published on 1 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-2026-31720 and fix it if it is affected.\n\nWhat it is: CVE-2026-31720 is a high-severity memory corruption vulnerability in Linux kernel, published on 1 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-2026-31720 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-2026-31720/ (Markdown: https://insights.sbomify.com/CVE-2026-31720/index.md)","id":"CVE-2026-31720","markdown":"https://insights.sbomify.com/CVE-2026-31720/index.md","name":"CVE-2026-31720","record":{"aliases":["BELL-CVE-2026-31720","DEBIAN-CVE-2026-31720","GHSA-pmxh-4w53-fp85","ROOT-OS-DEBIAN-11-CVE-2026-31720","ROOT-OS-UBUNTU-2204-CVE-2026-31720","ROOT-OS-UBUNTU-2404-CVE-2026-31720","UBUNTU-CVE-2026-31720"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel USB gadget","requires_auth":"low_privilege","summary":"A stack out-of-bounds write in the Linux kernel USB audio gadget driver allows attackers to potentially execute code or escalate privileges via malicious USB requests.","user_interaction":"not_required","vuln_class":"memory_corruption"},"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":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_uac1_legacy: validate control request size\n\nf_audio_complete() copies req-\u003elength bytes into a 4-byte stack\nvariable:\n\n  u32 data = 0;\n  memcpy(\u0026data, req-\u003ebuf, req-\u003elength);\n\nreq-\u003elength is derived from the host-controlled USB request path,\nwhich can lead to a stack out-of-bounds write.\n\nValidate req-\u003eactual against the expected payload size for the\nsupported control selectors and decode only the expected amount\nof data.\n\nThis avoids copying a host-influenced length into a fixed-size\nstack object.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-04-02","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-04-02T16:08:03Z","kind":"github_poc","ref":"https://github.com/foxirain/linux-kernel-codex-harness","stars":0,"title":"Evidence-driven Linux kernel vulnerability research harness used in the investigation of CVE-2026-31720"}],"tier":"poc_unverified"},"has_fix":true,"headline":"usb: gadget: f_uac1_legacy: validate control request size","id":"CVE-2026-31720","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"usb: gadget: f_hid: move list and spinlock inits from bind to alloc","id":"CVE-2026-31721"},"packages":[],"prev":{"headline":"crypto: krb5enc - fix async decrypt skipping hash verification","id":"CVE-2026-31719"},"products":["Linux"],"published":"2026-05-01","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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"A stack out-of-bounds write in the Linux kernel USB audio gadget driver allows attackers to potentially execute code or escalate privileges via malicious USB requests.","url":"https://insights.sbomify.com/CVE-2026-31720/"}