{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-31616 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-31616 is a medium-severity memory corruption vulnerability in Linux kernel, published on 24 Apr 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-2026-31616 and fix it if it is affected.\n\nWhat it is: CVE-2026-31616 is a medium-severity memory corruption vulnerability in Linux kernel, published on 24 Apr 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-2026-31616 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-2026-31616/ (Markdown: https://insights.sbomify.com/CVE-2026-31616/index.md)","id":"CVE-2026-31616","markdown":"https://insights.sbomify.com/CVE-2026-31616/index.md","name":"CVE-2026-31616","record":{"aliases":["BELL-CVE-2026-31616","DEBIAN-CVE-2026-31616","GHSA-h96r-xqwg-w67w","ROOT-OS-DEBIAN-11-CVE-2026-31616","ROOT-OS-DEBIAN-12-CVE-2026-31616","ROOT-OS-UBUNTU-2204-CVE-2026-31616","ROOT-OS-UBUNTU-2404-CVE-2026-31616","UBUNTU-CVE-2026-31616"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel USB gadget","requires_auth":"low_privilege","summary":"A malicious USB host can trigger a heap buffer overflow in the Linux kernel Phonet gadget driver, potentially leading to code execution or system crash.","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":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_phonet: fix skb frags[] overflow in pn_rx_complete()\n\nA broken/bored/mean USB host can overflow the skb_shared_info-\u003efrags[]\narray on a Linux gadget exposing a Phonet function by sending an\nunbounded sequence of full-page OUT transfers.\n\npn_rx_complete() finalizes the skb only when req-\u003eactual \u003c req-\u003elength,\nwhere req-\u003elength is set to PAGE_SIZE by the gadget.  If the host always\nsends exactly PAGE_SIZE bytes per transfer, fp-\u003erx.skb will never be\nreset and each completion will add another fragment via\nskb_add_rx_frag().  Once nr_frags exceeds MAX_SKB_FRAGS (default 17),\nsubsequent frag stores overwrite memory adjacent to the shinfo on the\nheap.\n\nDrop the skb and account a length error when the frag limit is reached,\nmatching the fix applied in t7xx by commit f0813bcd2d9d (\"net: wwan:\nt7xx: fix potential skb-\u003efrags overflow in RX 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":"usb: gadget: f_phonet: fix skb frags[] overflow in pn_rx_complete()","id":"CVE-2026-31616","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":9,"next":{"headline":"usb: gadget: f_ncm: validate minimum block_len in ncm_unwrap_ntb()","id":"CVE-2026-31617"},"packages":[],"prev":{"headline":"usb: gadget: renesas_usb3: validate endpoint index in standard request handlers","id":"CVE-2026-31615"},"products":["Linux"],"published":"2026-04-24","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)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-06-14","vendors":["Linux"]},"summary":"A malicious USB host can trigger a heap buffer overflow in the Linux kernel Phonet gadget driver, potentially leading to code execution or system crash.","url":"https://insights.sbomify.com/CVE-2026-31616/"}