{"id":"CVE-2024-50138","title":"bpf: Use raw_spinlock_t in ringbuf","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Use raw_spinlock_t in ringbuf\n\nThe function __bpf_ringbuf_reserve is invoked from a tracepoint, which\ndisables preemption. Using spinlock_t in this context can lea…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 457f44363a8894135c85b7a9afd2bd8196db24ab < 5eb34999d118e69a20dc0c6556f315fcb0a1f8d3","Linux >= 457f44363a8894135c85b7a9afd2bd8196db24ab < f9543375d9b150b2bcf16bb182e6b62309db0888","Linux >= 457f44363a8894135c85b7a9afd2bd8196db24ab < ca30e682e5d6de44d12c4610767811c9a21d59ba","Linux >= 457f44363a8894135c85b7a9afd2bd8196db24ab < 8b62645b09f870d70c7910e7550289d444239a46","Linux 5.8"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:27:43.586642Z"},"published":"2024-11-05","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:31:22.016Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-50138","references":[{"url":"https://git.kernel.org/stable/c/5eb34999d118e69a20dc0c6556f315fcb0a1f8d3"},{"url":"https://git.kernel.org/stable/c/f9543375d9b150b2bcf16bb182e6b62309db0888"},{"url":"https://git.kernel.org/stable/c/ca30e682e5d6de44d12c4610767811c9a21d59ba"},{"url":"https://git.kernel.org/stable/c/8b62645b09f870d70c7910e7550289d444239a46"}],"tags":["cve.org"],"epss":0.00221,"epssPercentile":0.12782,"ingestedAt":"2026-11-05T22:38:31.828Z","slug":"CVE-2024-50138","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Use raw_spinlock_t in ringbuf\n\nThe function __bpf_ringbuf_reserve is invoked from a tracepoint, which\ndisables preemption. Using spinlock_t in this context can lead to a\n\"sleep in atomic\" warning in the RT variant. This issue is illustrated\nin the example below:\n\nBUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48\nin_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 556208, name: test_progs\npreempt_count: 1, expected: 0\nRCU nest depth: 1, expected: 1\nINFO: lockdep is turned off.\nPreemption disabled at:\n[<ffffd33a5c88ea44>] migrate_enable+0xc0/0x39c\nCPU: 7 PID: 556208 Comm: test_progs Tainted: G\nHardware name: Qualcomm SA8775P Ride (DT)\nCall trace:\n dump_backtrace+0xac/0x130\n show_stack+0x1c/0x30\n dump_stack_lvl+0xac/0xe8\n dump_stack+0x18/0x30\n __might_resched+0x3bc/0x4fc\n rt_spin_lock+0x8c/0x1a4\n __bpf_ringbuf_reserve+0xc4/0x254\n bpf_ringbuf_reserve_dynptr+0x5c/0xdc\n bpf_prog_ac3d15160d62622a_test_read_write+0x104/0x238\n trace_call_bpf+0x238/0x774\n perf_call_bpf_enter.isra.0+0x104/0x194\n perf_syscall_enter+0x2f8/0x510\n trace_sys_enter+0x39c/0x564\n syscall_trace_enter+0x220/0x3c0\n do_el0_svc+0x138/0x1dc\n el0_svc+0x54/0x130\n el0t_64_sync_handler+0x134/0x150\n el0t_64_sync+0x17c/0x180\n\nSwitch the spinlock to raw_spinlock_t to avoid this error.\n\n## Affected\n\n- `Linux >= 457f44363a8894135c85b7a9afd2bd8196db24ab < 5eb34999d118e69a20dc0c6556f315fcb0a1f8d3`\n- `Linux >= 457f44363a8894135c85b7a9afd2bd8196db24ab < f9543375d9b150b2bcf16bb182e6b62309db0888`\n- `Linux >= 457f44363a8894135c85b7a9afd2bd8196db24ab < ca30e682e5d6de44d12c4610767811c9a21d59ba`\n- `Linux >= 457f44363a8894135c85b7a9afd2bd8196db24ab < 8b62645b09f870d70c7910e7550289d444239a46`\n- `Linux 5.8`\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":[]}