{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2024-56740 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2024-56740 is a high-severity memory corruption vulnerability in Linux kernel, published on 29 Dec 2024. 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-2024-56740 and fix it if it is affected.\n\nWhat it is: CVE-2024-56740 is a high-severity memory corruption vulnerability in Linux kernel, published on 29 Dec 2024. 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-2024-56740 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-2024-56740/ (Markdown: https://insights.sbomify.com/CVE-2024-56740/index.md)","id":"CVE-2024-56740","markdown":"https://insights.sbomify.com/CVE-2024-56740/index.md","name":"CVE-2024-56740","record":{"aliases":["BELL-CVE-2024-56740","GHSA-24mf-qj78-vm87","UBUNTU-CVE-2024-56740"],"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 NFS","requires_auth":"low_privilege","summary":"A memory corruption vulnerability in the Linux kernel's NFSv3 LOCALIO implementation allows attackers to cause system crashes or potentially execute code.","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":"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":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfs/localio: must clear res.replen in nfs_local_read_done\n\nOtherwise memory corruption can occur due to NFSv3 LOCALIO reads\nleaving garbage in res.replen:\n- nfs3_read_done() copies that into server-\u003eread_hdrsize; from there\n  nfs3_proc_read_setup() copies it to args.replen in new requests.\n- nfs3_xdr_enc_read3args() passes that to rpc_prepare_reply_pages()\n  which includes it in hdrsize for xdr_init_pages, so that rq_rcv_buf\n  contains a ridiculous len.\n- This is copied to rq_private_buf and xs_read_stream_request()\n  eventually passes the kvec to sock_recvmsg() which receives incoming\n  data into entirely the wrong place.\n\nThis is easily reproduced with NFSv3 LOCALIO that is servicing reads\nwhen it is made to pivot back to using normal RPC.  This switch back\nto using normal NFSv3 with RPC can occur for a few reasons but this\nissue was exposed with a test that stops and then restarts the NFSv3\nserver while LOCALIO is performing heavy read IO.","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":"nfs/localio: must clear res.replen in nfs_local_read_done","id":"CVE-2024-56740","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"memory_corruption","year":"2024"},"n_packages":0,"n_references":2,"next":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2024-56741"},"packages":[],"prev":{"headline":"rtc: check if __rtc_read_time was successful in rtc_timer_do_work()","id":"CVE-2024-56739"},"products":["Linux"],"published":"2024-12-29","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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A memory corruption vulnerability in the Linux kernel's NFSv3 LOCALIO implementation allows attackers to cause system crashes or potentially execute code.","url":"https://insights.sbomify.com/CVE-2024-56740/"}