{"id":"CVE-2026-53083","title":"bpf: Fix RCU stall in bpf_fd_array_map_clear()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix RCU stall in bpf_fd_array_map_clear()\n\nAdd a missing cond_resched() in bpf_fd_array_map_clear() loop.\n\nFor PROG_ARRAY maps with many entries this loop calls\npr…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < 419878a48085e6d5c2fcc4912eeaac2f8abf36ed","Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < b1f7158a86f3cbac4d5a32beb55ca0f8027d44cd","Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < 71ddb7defc442ab38c53123c384fedbfd8410a15","Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < e1ed678855e315f90c70c1723e94157a9a82e660","Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < 67bdb4b0d26f2d6bbf1798a925ef5a3b9ed7357a","Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < 4406942e65ca128c56c67443832988873c21d2e9","Linux 5.5"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:18:02.802733Z"},"published":"2026-06-24","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:23:58.684Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53083","references":[{"url":"https://git.kernel.org/stable/c/419878a48085e6d5c2fcc4912eeaac2f8abf36ed"},{"url":"https://git.kernel.org/stable/c/b1f7158a86f3cbac4d5a32beb55ca0f8027d44cd"},{"url":"https://git.kernel.org/stable/c/71ddb7defc442ab38c53123c384fedbfd8410a15"},{"url":"https://git.kernel.org/stable/c/e1ed678855e315f90c70c1723e94157a9a82e660"},{"url":"https://git.kernel.org/stable/c/67bdb4b0d26f2d6bbf1798a925ef5a3b9ed7357a"},{"url":"https://git.kernel.org/stable/c/4406942e65ca128c56c67443832988873c21d2e9"}],"tags":["cve.org"],"epss":0.00162,"epssPercentile":0.05464,"ingestedAt":"2026-11-05T15:02:32.352Z","slug":"CVE-2026-53083","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix RCU stall in bpf_fd_array_map_clear()\n\nAdd a missing cond_resched() in bpf_fd_array_map_clear() loop.\n\nFor PROG_ARRAY maps with many entries this loop calls\nprog_array_map_poke_run() per entry which can be expensive, and\nwithout yielding this can cause RCU stalls under load:\n\n  rcu: Stack dump where RCU GP kthread last ran:\n  CPU: 0 UID: 0 PID: 30932 Comm: kworker/0:2 Not tainted 6.14.0-13195-g967e8def1100 #2 PREEMPT(undef)\n  Workqueue: events prog_array_map_clear_deferred\n  RIP: 0010:write_comp_data+0x38/0x90 kernel/kcov.c:246\n  Call Trace:\n   <TASK>\n   prog_array_map_poke_run+0x77/0x380 kernel/bpf/arraymap.c:1096\n   __fd_array_map_delete_elem+0x197/0x310 kernel/bpf/arraymap.c:925\n   bpf_fd_array_map_clear kernel/bpf/arraymap.c:1000 [inline]\n   prog_array_map_clear_deferred+0x119/0x1b0 kernel/bpf/arraymap.c:1141\n   process_one_work+0x898/0x19d0 kernel/workqueue.c:3238\n   process_scheduled_works kernel/workqueue.c:3319 [inline]\n   worker_thread+0x770/0x10b0 kernel/workqueue.c:3400\n   kthread+0x465/0x880 kernel/kthread.c:464\n   ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153\n   ret_from_fork_asm+0x19/0x30 arch/x86/entry/entry_64.S:245\n   </TASK>\n\n## Affected\n\n- `Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < 419878a48085e6d5c2fcc4912eeaac2f8abf36ed`\n- `Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < b1f7158a86f3cbac4d5a32beb55ca0f8027d44cd`\n- `Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < 71ddb7defc442ab38c53123c384fedbfd8410a15`\n- `Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < e1ed678855e315f90c70c1723e94157a9a82e660`\n- `Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < 67bdb4b0d26f2d6bbf1798a925ef5a3b9ed7357a`\n- `Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < 4406942e65ca128c56c67443832988873c21d2e9`\n- `Linux 5.5`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}