{"answers":{"affected":"It affects 27 products.","exploited":"There is no known exploitation of CVE-2020-8835 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2020-8835 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 2 Apr 2020. 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-2020-8835 and fix it if it is affected.\n\nWhat it is: CVE-2020-8835 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 2 Apr 2020. 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-2020-8835 in the wild and no public exploit code.\n\nAffected product: Canonical Ubuntu Linux. 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-2020-8835/ (Markdown: https://insights.sbomify.com/CVE-2020-8835/index.md)","id":"CVE-2020-8835","markdown":"https://insights.sbomify.com/CVE-2020-8835/index.md","name":"CVE-2020-8835","record":{"aliases":["DEBIAN-CVE-2020-8835","GHSA-774r-wvx9-mm68","UBUNTU-CVE-2020-8835","USN-4313-1"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A flaw in the Linux kernel BPF verifier allows out-of-bounds memory access, enabling local attackers to execute arbitrary code or escalate privileges.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"canonical","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"fedora","vendor":"fedoraproject"},{"product":"linux_kernel","vendor":"linux"},{"product":"8300_firmware","vendor":"netapp"},{"product":"8700_firmware","vendor":"netapp"},{"product":"a220_firmware","vendor":"netapp"},{"product":"a320_firmware","vendor":"netapp"},{"product":"a400_firmware","vendor":"netapp"},{"product":"a700s_firmware","vendor":"netapp"},{"product":"a800_firmware","vendor":"netapp"},{"product":"c190_firmware","vendor":"netapp"},{"product":"cloud_backup","vendor":"netapp"},{"product":"fas2720_firmware","vendor":"netapp"},{"product":"fas2750_firmware","vendor":"netapp"},{"product":"h300e_firmware","vendor":"netapp"},{"product":"h300s_firmware","vendor":"netapp"},{"product":"h410s_firmware","vendor":"netapp"},{"product":"h500e_firmware","vendor":"netapp"},{"product":"h500s_firmware","vendor":"netapp"},{"product":"h610c_firmware","vendor":"netapp"},{"product":"h610s_firmware","vendor":"netapp"},{"product":"h615c_firmware","vendor":"netapp"},{"product":"h700e_firmware","vendor":"netapp"},{"product":"h700s_firmware","vendor":"netapp"},{"product":"hci_management_node","vendor":"netapp"},{"product":"solidfire","vendor":"netapp"},{"product":"steelstore_cloud_integrated_storage","vendor":"netapp"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2020-05-12","github_poc":7,"max_poc_stars":4,"metasploit":0,"nuclei":0,"refs":[{"date":"2020-07-04T15:51:14Z","kind":"github_poc","ref":"https://github.com/snappyJack/Rick_write_exp_CVE-2020-8835","stars":4,"title":null},{"date":"2021-06-04T16:15:21Z","kind":"github_poc","ref":"https://github.com/digamma-ai/CVE-2020-8835-verification","stars":2,"title":"Formal verification example for CVE-2020-8835"},{"date":"2020-05-12T16:18:31Z","kind":"github_poc","ref":"https://github.com/Prabhashaka/Exploitation-CVE-2020-8835","stars":0,"title":null},{"date":"2020-09-30T05:21:40Z","kind":"github_poc","ref":"https://github.com/zilong3033/CVE-2020-8835","stars":0,"title":null},{"date":"2020-10-18T03:17:58Z","kind":"github_poc","ref":"https://github.com/SplendidSky/CVE-2020-8835","stars":0,"title":null},{"date":"2023-03-20T18:17:40Z","kind":"github_poc","ref":"https://github.com/johnatag/INF8602-CVE-2020-8835","stars":0,"title":null},{"date":"2026-07-21T18:41:01Z","kind":"github_poc","ref":"https://github.com/WhatsWrongAndWhy/CVE-2020-8835","stars":0,"title":null}],"tier":"poc_unverified"},"has_fix":true,"headline":"Linux kernel bpf verifier vulnerability","id":"CVE-2020-8835","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","fedoraproject:fedora","linux:linux_kernel","netapp:cloud_backup","netapp:h300e_firmware","netapp:h300s_firmware","netapp:h410s_firmware","netapp:h500e_firmware","netapp:h500s_firmware","netapp:h610s_firmware","netapp:h700e_firmware","netapp:h700s_firmware","netapp:hci_management_node","netapp:solidfire","netapp:steelstore_cloud_integrated_storage"],"type":"memory_corruption","year":"2020"},"n_packages":0,"n_references":12,"next":{"headline":"Code injection in n/a","id":"CVE-2020-8838"},"packages":[],"prev":{"headline":"Linux kernel KVM Power8 conflicting use of HSTATE_HOST_R1","id":"CVE-2020-8834"},"products":["Linux kernel"],"published":"2020-04-02","related":[{"cvss_score":9.8,"headline":"SaltStack Salt Authentication Bypass","id":"CVE-2020-11651","kev_date_added":"2021-11-03","published":"2020-04-30"},{"cvss_score":9.8,"headline":"OpenSMTPD Remote Code Execution","id":"CVE-2020-7247","kev_date_added":"2022-03-25","published":"2020-01-29"},{"cvss_score":9.8,"headline":"Exim Out-of-bounds Write","id":"CVE-2019-16928","kev_date_added":"2022-03-03","published":"2019-09-27"},{"cvss_score":9.8,"headline":"Exim Buffer Overflow","id":"CVE-2018-6789","kev_date_added":"2021-11-03","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Oracle Java SE and Java SE Embedded Remote Code Execution","id":"CVE-2015-2590","kev_date_added":"2022-03-03","published":"2015-07-16"},{"cvss_score":9.8,"headline":"Oracle JRE Remote Code Execution","id":"CVE-2013-0422","kev_date_added":"2022-05-25","published":"2013-01-10"},{"cvss_score":9.8,"headline":"Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution","id":"CVE-2011-3544","kev_date_added":"2022-03-03","published":"2011-10-19"}],"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":"2024-09-17","vendors":["Linux kernel"]},"summary":"A flaw in the Linux kernel BPF verifier allows out-of-bounds memory access, enabling local attackers to execute arbitrary code or escalate privileges.","url":"https://insights.sbomify.com/CVE-2020-8835/"}