{"id":"CVE-2023-53007","title":"tracing: Make sure trace_printk() can output as soon as it can be used","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Make sure trace_printk() can output as soon as it can be used\n\nCurrently trace_printk() can be used as soon as early_trace_init() is\ncalled from start_kernel()…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < f97eb0ab066133483a65c93eb894748de2f6b598","Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < b94d7c7654356860dd7719120c7d15ba38b6162a","Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < 76b2390fdc80c0a8300e5da5b6b62d201b6fe9ce","Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < de3930a4883ddad2244efd6d349013294c62c75c","Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < b0af180514edea6c83dc9a299d9f383009c99f25","Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < 198c83963f6335ca6d690cff067679560f2a3a22","Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < 3bb06eb6e9acf7c4a3e1b5bc87aed398ff8e2253","Linux 4.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:14:20.698476Z"},"published":"2025-03-27","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:20:53.945Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53007","references":[{"url":"https://git.kernel.org/stable/c/f97eb0ab066133483a65c93eb894748de2f6b598"},{"url":"https://git.kernel.org/stable/c/b94d7c7654356860dd7719120c7d15ba38b6162a"},{"url":"https://git.kernel.org/stable/c/76b2390fdc80c0a8300e5da5b6b62d201b6fe9ce"},{"url":"https://git.kernel.org/stable/c/de3930a4883ddad2244efd6d349013294c62c75c"},{"url":"https://git.kernel.org/stable/c/b0af180514edea6c83dc9a299d9f383009c99f25"},{"url":"https://git.kernel.org/stable/c/198c83963f6335ca6d690cff067679560f2a3a22"},{"url":"https://git.kernel.org/stable/c/3bb06eb6e9acf7c4a3e1b5bc87aed398ff8e2253"}],"tags":["cve.org"],"epss":0.00208,"epssPercentile":0.10954,"ingestedAt":"2026-11-05T22:38:31.753Z","slug":"CVE-2023-53007","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Make sure trace_printk() can output as soon as it can be used\n\nCurrently trace_printk() can be used as soon as early_trace_init() is\ncalled from start_kernel(). But if a crash happens, and\n\"ftrace_dump_on_oops\" is set on the kernel command line, all you get will\nbe:\n\n  [    0.456075]   <idle>-0         0dN.2. 347519us : Unknown type 6\n  [    0.456075]   <idle>-0         0dN.2. 353141us : Unknown type 6\n  [    0.456075]   <idle>-0         0dN.2. 358684us : Unknown type 6\n\nThis is because the trace_printk() event (type 6) hasn't been registered\nyet. That gets done via an early_initcall(), which may be early, but not\nearly enough.\n\nInstead of registering the trace_printk() event (and other ftrace events,\nwhich are not trace events) via an early_initcall(), have them registered at\nthe same time that trace_printk() can be used. This way, if there is a\ncrash before early_initcall(), then the trace_printk()s will actually be\nuseful.\n\n## Affected\n\n- `Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < f97eb0ab066133483a65c93eb894748de2f6b598`\n- `Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < b94d7c7654356860dd7719120c7d15ba38b6162a`\n- `Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < 76b2390fdc80c0a8300e5da5b6b62d201b6fe9ce`\n- `Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < de3930a4883ddad2244efd6d349013294c62c75c`\n- `Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < b0af180514edea6c83dc9a299d9f383009c99f25`\n- `Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < 198c83963f6335ca6d690cff067679560f2a3a22`\n- `Linux >= e725c731e3bb1e892e7b564c945b121cb41d1087 < 3bb06eb6e9acf7c4a3e1b5bc87aed398ff8e2253`\n- `Linux 4.12`\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":[]}