{"id":"CVE-2023-54181","summary":"bpf: Fix issue in verifying allow_ptr_leaks","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix issue in verifying allow_ptr_leaks\n\nAfter we converted the capabilities of our networking-bpf program from\ncap_sys_admin to cap_net_admin+cap_bpf, our networking-bpf program\nfailed to start. Because it failed the bpf verifier, and the error log\nis \"R3 pointer comparison prohibited\".\n\nA simple reproducer as follows,\n\nSEC(\"cls-ingress\")\nint ingress(struct __sk_buff *skb)\n{\n\tstruct iphdr *iph = (void *)(long)skb-\u003edata + sizeof(struct ethhdr);\n\n\tif ((long)(iph + 1) \u003e (long)skb-\u003edata_end)\n\t\treturn TC_ACT_STOLEN;\n\treturn TC_ACT_OK;\n}\n\nPer discussion with Yonghong and Alexei [1], comparison of two packet\npointers is not a pointer leak. This patch fixes it.\n\nOur local kernel is 6.1.y and we expect this fix to be backported to\n6.1.y, so stable is CCed.\n\n[1]. https://lore.kernel.org/bpf/CAADnVQ+Nmspr7Si+pxWn8zkE7hX-7s93ugwC+94aXSy4uQ9vBg@mail.gmail.com/","modified":"2026-03-31T17:30:04.427288592Z","published":"2025-12-30T12:08:52.376Z","related":["SUSE-SU-2026:0278-1","SUSE-SU-2026:0281-1","SUSE-SU-2026:0293-1","SUSE-SU-2026:0315-1","SUSE-SU-2026:20477-1","SUSE-SU-2026:20498-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54181.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/5927f0172d2809d8fc09c1ba667280b0387e9f73"},{"type":"WEB","url":"https://git.kernel.org/stable/c/acfdc8b77016c8e648aadc283177546c88083dd3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c96c67991aac6401b4c6996093bccb704bb2ea4b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d75e30dddf73449bc2d10bb8e2f1a2c446bc67a2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54181.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54181"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366"},{"fixed":"c96c67991aac6401b4c6996093bccb704bb2ea4b"},{"fixed":"5927f0172d2809d8fc09c1ba667280b0387e9f73"},{"fixed":"acfdc8b77016c8e648aadc283177546c88083dd3"},{"fixed":"d75e30dddf73449bc2d10bb8e2f1a2c446bc67a2"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-54181.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.8.0"},{"fixed":"6.1.53"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.4.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.5.0"},{"fixed":"6.5.3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-54181.json"}}],"schema_version":"1.7.5"}