{"id":"CVE-2023-52621","state":"PUBLISHED","title":"bpf: Check rcu_read_lock_trace_held() before calling bpf map helpers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check rcu_read_lock_trace_held() before calling bpf map helpers\n\nThese three bpf_map_{lookup,update,delete}_elem() helpers are also\navailable for sleepable bpf program, so add the corresponding lock\nassertion for sleepable bpf program, otherwise the following warning\nwill be reported when a sleepable bpf program manipulates bpf map under\ninterpreter mode (aka bpf_jit_enable=0):\n\n  WARNING: CPU: 3 PID: 4985 at kernel/bpf/helpers.c:40 ......\n  CPU: 3 PID: 4985 Comm: test_progs Not tainted 6.6.0+ #2\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) ......\n  RIP: 0010:bpf_map_lookup_elem+0x54/0x60\n  ......\n  Call Trace:\n   <TASK>\n   ? __warn+0xa5/0x240\n   ? bpf_map_lookup_elem+0x54/0x60\n   ? report_bug+0x1ba/0x1f0\n   ? handle_bug+0x40/0x80\n   ? exc_invalid_op+0x18/0x50\n   ? asm_exc_invalid_op+0x1b/0x20\n   ? __pfx_bpf_map_lookup_elem+0x10/0x10\n   ? rcu_lockdep_current_cpu_online+0x65/0xb0\n   ? rcu_is_watching+0x23/0x50\n   ? bpf_map_lookup_elem+0x54/0x60\n   ? __pfx_bpf_map_lookup_elem+0x10/0x10\n   ___bpf_prog_run+0x513/0x3b70\n   __bpf_prog_run32+0x9d/0xd0\n   ? __bpf_prog_enter_sleepable_recur+0xad/0x120\n   ? __bpf_prog_enter_sleepable_recur+0x3e/0x120\n   bpf_trampoline_6442580665+0x4d/0x1000\n   __x64_sys_getpgid+0x5/0x30\n   ? do_syscall_64+0x36/0xb0\n   entry_SYSCALL_64_after_hwframe+0x6e/0x76\n   </TASK>","publishedAt":"2024-03-26T17:19:23.208Z","updatedAt":"2026-05-11T19:30:31.518Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1e6c62a8821557720a9b2ea9617359b264f2f67c","status":"affected","lessThan":"82f2df94dac1aa9b879e74d1f82ba1b631bdc612","versionType":"git"},{"version":"1e6c62a8821557720a9b2ea9617359b264f2f67c","status":"affected","lessThan":"3516f93cc63d956e1b290ae4b7bf2586074535a0","versionType":"git"},{"version":"1e6c62a8821557720a9b2ea9617359b264f2f67c","status":"affected","lessThan":"d6d6fe4bb105595118f12abeed4a7bdd450853f3","versionType":"git"},{"version":"1e6c62a8821557720a9b2ea9617359b264f2f67c","status":"affected","lessThan":"483cb92334cd7f1d5387dccc0ab5d595d27a669d","versionType":"git"},{"version":"1e6c62a8821557720a9b2ea9617359b264f2f67c","status":"affected","lessThan":"c7f1b6146f4a46d727c0d046284c28b6882c6304","versionType":"git"},{"version":"1e6c62a8821557720a9b2ea9617359b264f2f67c","status":"affected","lessThan":"169410eba271afc9f0fb476d996795aa26770c6d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/helpers.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.237","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.181","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.77","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.16","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.4","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/helpers.c"]}],"references":["https://git.kernel.org/stable/c/82f2df94dac1aa9b879e74d1f82ba1b631bdc612","https://git.kernel.org/stable/c/3516f93cc63d956e1b290ae4b7bf2586074535a0","https://git.kernel.org/stable/c/d6d6fe4bb105595118f12abeed4a7bdd450853f3","https://git.kernel.org/stable/c/483cb92334cd7f1d5387dccc0ab5d595d27a669d","https://git.kernel.org/stable/c/c7f1b6146f4a46d727c0d046284c28b6882c6304","https://git.kernel.org/stable/c/169410eba271afc9f0fb476d996795aa26770c6d","https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/52xxx/CVE-2023-52621.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-52621","state":"PUBLISHED","datePublished":"2024-03-26T17:19:23.208Z","dateUpdated":"2026-05-11T19:30:31.518Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-03-06T09:52:12.090Z"},"containers":{"cna":{"title":"bpf: Check rcu_read_lock_trace_held() before calling bpf map helpers","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check rcu_read_lock_trace_held() before calling bpf map helpers\n\nThese three bpf_map_{lookup,update,delete}_elem() helpers are also\navailable for sleepable bpf program, so add the corresponding lock\nassertion for sleepable bpf program, otherwise the following warning\nwill be reported when a sleepable bpf program manipulates bpf map under\ninterpreter mode (aka bpf_jit_enable=0):\n\n  WARNING: CPU: 3 PID: 4985 at kernel/bpf/helpers.c:40 ......\n  CPU: 3 PID: 4985 Comm: test_progs Not tainted 6.6.0+ #2\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) ......\n  RIP: 0010:bpf_map_lookup_elem+0x54/0x60\n  ......\n  Call Trace:\n   <TASK>\n   ? __warn+0xa5/0x240\n   ? bpf_map_lookup_elem+0x54/0x60\n   ? report_bug+0x1ba/0x1f0\n   ? handle_bug+0x40/0x80\n   ? exc_invalid_op+0x18/0x50\n   ? asm_exc_invalid_op+0x1b/0x20\n   ? __pfx_bpf_map_lookup_elem+0x10/0x10\n   ? rcu_lockdep_current_cpu_online+0x65/0xb0\n   ? rcu_is_watching+0x23/0x50\n   ? bpf_map_lookup_elem+0x54/0x60\n   ? __pfx_bpf_map_lookup_elem+0x10/0x10\n   ___bpf_prog_run+0x513/0x3b70\n   __bpf_prog_run32+0x9d/0xd0\n   ? __bpf_prog_enter_sleepable_recur+0xad/0x120\n   ? __bpf_prog_enter_sleepable_recur+0x3e/0x120\n   bpf_trampoline_6442580665+0x4d/0x1000\n   __x64_sys_getpgid+0x5/0x30\n   ? do_syscall_64+0x36/0xb0\n   entry_SYSCALL_64_after_hwframe+0x6e/0x76\n   </TASK>"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1e6c62a8821557720a9b2ea9617359b264f2f67c","status":"affected","lessThan":"82f2df94dac1aa9b879e74d1f82ba1b631bdc612","versionType":"git"},{"version":"1e6c62a8821557720a9b2ea9617359b264f2f67c","status":"affected","lessThan":"3516f93cc63d956e1b290ae4b7bf2586074535a0","versionType":"git"},{"version":"1e6c62a8821557720a9b2ea9617359b264f2f67c","status":"affected","lessThan":"d6d6fe4bb105595118f12abeed4a7bdd450853f3","versionType":"git"},{"version":"1e6c62a8821557720a9b2ea9617359b264f2f67c","status":"affected","lessThan":"483cb92334cd7f1d5387dccc0ab5d595d27a669d","versionType":"git"},{"version":"1e6c62a8821557720a9b2ea9617359b264f2f67c","status":"affected","lessThan":"c7f1b6146f4a46d727c0d046284c28b6882c6304","versionType":"git"},{"version":"1e6c62a8821557720a9b2ea9617359b264f2f67c","status":"affected","lessThan":"169410eba271afc9f0fb476d996795aa26770c6d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/helpers.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.237","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.181","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.77","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.16","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.4","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/helpers.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/82f2df94dac1aa9b879e74d1f82ba1b631bdc612"},{"url":"https://git.kernel.org/stable/c/3516f93cc63d956e1b290ae4b7bf2586074535a0"},{"url":"https://git.kernel.org/stable/c/d6d6fe4bb105595118f12abeed4a7bdd450853f3"},{"url":"https://git.kernel.org/stable/c/483cb92334cd7f1d5387dccc0ab5d595d27a669d"},{"url":"https://git.kernel.org/stable/c/c7f1b6146f4a46d727c0d046284c28b6882c6304"},{"url":"https://git.kernel.org/stable/c/169410eba271afc9f0fb476d996795aa26770c6d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:30:31.518Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.10.237"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.15.181"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.1.77"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.6.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.7.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.8"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE 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