{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2024-50063 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2024-50063 is a high-severity vulnerability in Debian Debian Linux, published on 21 Oct 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-2024-50063 and fix it if it is affected.\n\nWhat it is: CVE-2024-50063 is a high-severity vulnerability in Debian Debian Linux, published on 21 Oct 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-2024-50063 in the wild and no public exploit code.\n\nAffected product: Debian Debian 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-2024-50063/ (Markdown: https://insights.sbomify.com/CVE-2024-50063/index.md)","id":"CVE-2024-50063","markdown":"https://insights.sbomify.com/CVE-2024-50063/index.md","name":"CVE-2024-50063","record":{"aliases":["AZL-53741","BELL-CVE-2024-50063","DEBIAN-CVE-2024-50063","GHSA-hhvr-2xgw-v77v","ROOT-OS-DEBIAN-11-CVE-2024-50063","ROOT-OS-UBUNTU-2204-CVE-2024-50063","UBUNTU-CVE-2024-50063"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel BPF","requires_auth":"low_privilege","summary":"Attackers can bypass BPF verifier checks by tail calling programs attached to different hooks, potentially violating security policies.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"debian_linux","vendor":"debian"},{"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":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Prevent tail call between progs attached to different hooks\n\nbpf progs can be attached to kernel functions, and the attached functions\ncan take different parameters or return different return values. If\nprog attached to one kernel function tail calls prog attached to another\nkernel function, the ctx access or return value verification could be\nbypassed.\n\nFor example, if prog1 is attached to func1 which takes only 1 parameter\nand prog2 is attached to func2 which takes two parameters. Since verifier\nassumes the bpf ctx passed to prog2 is constructed based on func2's\nprototype, verifier allows prog2 to access the second parameter from\nthe bpf ctx passed to it. The problem is that verifier does not prevent\nprog1 from passing its bpf ctx to prog2 via tail call. In this case,\nthe bpf ctx passed to prog2 is constructed from func1 instead of func2,\nthat is, the assumption for ctx access verification is bypassed.\n\nAnother example, if BPF LSM prog1 is attached to hook file_alloc_security,\nand BPF LSM prog2 is attached to hook bpf_lsm_audit_rule_known. Verifier\nknows the return value rules for these two hooks, e.g. it is legal for\nbpf_lsm_audit_rule_known to return positive number 1, and it is illegal\nfor file_alloc_security to return positive number. So verifier allows\nprog2 to return positive number 1, but does not allow prog1 to return\npositive number. The problem is that verifier does not prevent prog1\nfrom calling prog2 via tail call. In this case, prog2's return value 1\nwill be used as the return value for prog1's hook file_alloc_security.\nThat is, the return value rule is bypassed.\n\nThis patch adds restriction for tail call to prevent such bypasses.","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":"bpf: Prevent tail call between progs attached to different hooks","id":"CVE-2024-50063","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","linux:linux_kernel"],"type":"security_feature_bypass","year":"2024"},"n_packages":0,"n_references":4,"next":{"headline":"zram: free secondary algorithms names","id":"CVE-2024-50064"},"packages":[],"prev":{"headline":"RDMA/rtrs-srv: Avoid null pointer deref during path establishment","id":"CVE-2024-50062"},"products":["Linux"],"published":"2024-10-21","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-15","vendors":["Linux"]},"summary":"Attackers can bypass BPF verifier checks by tail calling programs attached to different hooks, potentially violating security policies.","url":"https://insights.sbomify.com/CVE-2024-50063/"}