{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-31433 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-31433 is a high-severity memory corruption vulnerability in Linux kernel, published on 22 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-2026-31433 and fix it if it is affected.\n\nWhat it is: CVE-2026-31433 is a high-severity memory corruption vulnerability in Linux kernel, published on 22 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-2026-31433 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-2026-31433/ (Markdown: https://insights.sbomify.com/CVE-2026-31433/index.md)","id":"CVE-2026-31433","markdown":"https://insights.sbomify.com/CVE-2026-31433/index.md","name":"CVE-2026-31433","record":{"aliases":["BELL-CVE-2026-31433","DEBIAN-CVE-2026-31433","GHSA-32xq-pcg8-hc33","ROOT-OS-DEBIAN-12-CVE-2026-31433","ROOT-OS-UBUNTU-2204-CVE-2026-31433","ROOT-OS-UBUNTU-2404-CVE-2026-31433","UBUNTU-CVE-2026-31433"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A missing buffer length check in the Linux kernel ksmbd module allows out-of-bounds writes during compound SMB requests, potentially leading to memory corruption or crashes.","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":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":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix potencial OOB in get_file_all_info() for compound requests\n\nWhen a compound request consists of QUERY_DIRECTORY + QUERY_INFO\n(FILE_ALL_INFORMATION) and the first command consumes nearly the entire\nmax_trans_size, get_file_all_info() would blindly call smbConvertToUTF16()\nwith PATH_MAX, causing out-of-bounds write beyond the response buffer.\nIn get_file_all_info(), there was a missing validation check for\nthe client-provided OutputBufferLength before copying the filename into\nFileName field of the smb2_file_all_info structure.\nIf the filename length exceeds the available buffer space, it could lead to\npotential buffer overflows or memory corruption during smbConvertToUTF16\nconversion. This calculating the actual free buffer size using\nsmb2_calc_max_out_buf_len() and returning -EINVAL if the buffer is\ninsufficient and updating smbConvertToUTF16 to use the actual filename\nlength (clamped by PATH_MAX) to ensure a safe copy operation.","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: fix potencial OOB in get_file_all_info() for compound requests","id":"CVE-2026-31433","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":7,"next":{"headline":"btrfs: fix leak of kobject name for sub-group space_info","id":"CVE-2026-31434"},"packages":[],"prev":{"headline":"ksmbd: fix OOB write in QUERY_INFO for compound requests","id":"CVE-2026-31432"},"products":["Linux"],"published":"2026-04-22","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":"2026-08-05","vendors":["Linux"]},"summary":"A missing buffer length check in the Linux kernel ksmbd module allows out-of-bounds writes during compound SMB requests, potentially leading to memory corruption or crashes.","url":"https://insights.sbomify.com/CVE-2026-31433/"}