{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-53026 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-53026 is a high-severity vulnerability in Linux kernel, published on 27 Mar 2025. 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-2023-53026 and fix it if it is affected.\n\nWhat it is: CVE-2023-53026 is a high-severity vulnerability in Linux kernel, published on 27 Mar 2025. 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-2023-53026 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-2023-53026/ (Markdown: https://insights.sbomify.com/CVE-2023-53026/index.md)","id":"CVE-2023-53026","markdown":"https://insights.sbomify.com/CVE-2023-53026/index.md","name":"CVE-2023-53026","record":{"aliases":["BELL-CVE-2023-53026","DEBIAN-CVE-2023-53026","GHSA-gr26-qx48-q4hh","UBUNTU-CVE-2023-53026"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel RDMA","requires_auth":"low_privilege","summary":"An integer overflow in the Linux kernel RDMA core allows a local attacker to cause an infinite loop and system denial of service.","user_interaction":"not_required","vuln_class":"integer_overflow"},"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-835","name":"Loop with Unreachable Exit Condition"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix ib block iterator counter overflow\n\nWhen registering a new DMA MR after selecting the best aligned page size\nfor it, we iterate over the given sglist to split each entry to smaller,\naligned to the selected page size, DMA blocks.\n\nIn given circumstances where the sg entry and page size fit certain\nsizes and the sg entry is not aligned to the selected page size, the\ntotal size of the aligned pages we need to cover the sg entry is \u003e= 4GB.\nUnder this circumstances, while iterating page aligned blocks, the\ncounter responsible for counting how much we advanced from the start of\nthe sg entry is overflowed because its type is u32 and we pass 4GB in\nsize. This can lead to an infinite loop inside the iterator function\nbecause the overflow prevents the counter to be larger\nthan the size of the sg entry.\n\nFix the presented problem by changing the advancement condition to\neliminate overflow.\n\nBacktrace:\n[  192.374329] efa_reg_user_mr_dmabuf\n[  192.376783] efa_register_mr\n[  192.382579] pgsz_bitmap 0xfffff000 rounddown 0x80000000\n[  192.386423] pg_sz [0x80000000] umem_length[0xc0000000]\n[  192.392657] start 0x0 length 0xc0000000 params.page_shift 31 params.page_num 3\n[  192.399559] hp_cnt[3], pages_in_hp[524288]\n[  192.403690] umem-\u003esgt_append.sgt.nents[1]\n[  192.407905] number entries: [1], pg_bit: [31]\n[  192.411397] biter-\u003e__sg_nents [1] biter-\u003e__sg [0000000008b0c5d8]\n[  192.415601] biter-\u003e__sg_advance [665837568] sg_dma_len[3221225472]\n[  192.419823] biter-\u003e__sg_nents [1] biter-\u003e__sg [0000000008b0c5d8]\n[  192.423976] biter-\u003e__sg_advance [2813321216] sg_dma_len[3221225472]\n[  192.428243] biter-\u003e__sg_nents [1] biter-\u003e__sg [0000000008b0c5d8]\n[  192.432397] biter-\u003e__sg_advance [665837568] sg_dma_len[3221225472]","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":"RDMA/core: Fix ib block iterator counter overflow","id":"CVE-2023-53026","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"integer_overflow","year":"2023"},"n_packages":0,"n_references":5,"next":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2023-53027"},"packages":[],"prev":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2023-53025"},"products":["Linux"],"published":"2025-03-27","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":"partial"},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"An integer overflow in the Linux kernel RDMA core allows a local attacker to cause an infinite loop and system denial of service.","url":"https://insights.sbomify.com/CVE-2023-53026/"}