{"id":"CVE-2023-53167","title":"tracing: Fix null pointer dereference in tracing_err_log_open()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix null pointer dereference in tracing_err_log_open()\n\nFix an issue in function 'tracing_err_log_open'.\nThe function doesn't call 'seq_open' if the file is op…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 8a062902be725f647dc8da532b04d836546a369a < 93114cbc7cb169f6f26eeaed5286b91bb86b463b","Linux >= 8a062902be725f647dc8da532b04d836546a369a < 7060e5aac6dc195124c106f49106d653a416323a","Linux >= 8a062902be725f647dc8da532b04d836546a369a < 3b5d9b7b875968a8a8c99dac45cb85b705c44802","Linux >= 8a062902be725f647dc8da532b04d836546a369a < 938d5b7a75e18264887387ddf9169db6d8aeef98","Linux >= 8a062902be725f647dc8da532b04d836546a369a < 1e1c9aa9288a46c342f0f2c5c0b1c0876b9b0276","Linux >= 8a062902be725f647dc8da532b04d836546a369a < 02b0095e2fbbc060560c1065f86a211d91e27b26","Linux 5.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:19:23.433772Z"},"published":"2025-09-15","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:21:05.746Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53167","references":[{"url":"https://git.kernel.org/stable/c/93114cbc7cb169f6f26eeaed5286b91bb86b463b"},{"url":"https://git.kernel.org/stable/c/7060e5aac6dc195124c106f49106d653a416323a"},{"url":"https://git.kernel.org/stable/c/3b5d9b7b875968a8a8c99dac45cb85b705c44802"},{"url":"https://git.kernel.org/stable/c/938d5b7a75e18264887387ddf9169db6d8aeef98"},{"url":"https://git.kernel.org/stable/c/1e1c9aa9288a46c342f0f2c5c0b1c0876b9b0276"},{"url":"https://git.kernel.org/stable/c/02b0095e2fbbc060560c1065f86a211d91e27b26"}],"tags":["cve.org"],"epss":0.0016,"epssPercentile":0.05151,"ingestedAt":"2026-11-05T22:38:31.782Z","slug":"CVE-2023-53167","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix null pointer dereference in tracing_err_log_open()\n\nFix an issue in function 'tracing_err_log_open'.\nThe function doesn't call 'seq_open' if the file is opened only with\nwrite permissions, which results in 'file->private_data' being left as null.\nIf we then use 'lseek' on that opened file, 'seq_lseek' dereferences\n'file->private_data' in 'mutex_lock(&m->lock)', resulting in a kernel panic.\nWriting to this node requires root privileges, therefore this bug\nhas very little security impact.\n\nTracefs node: /sys/kernel/tracing/error_log\n\nExample Kernel panic:\n\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000038\nCall trace:\n mutex_lock+0x30/0x110\n seq_lseek+0x34/0xb8\n __arm64_sys_lseek+0x6c/0xb8\n invoke_syscall+0x58/0x13c\n el0_svc_common+0xc4/0x10c\n do_el0_svc+0x24/0x98\n el0_svc+0x24/0x88\n el0t_64_sync_handler+0x84/0xe4\n el0t_64_sync+0x1b4/0x1b8\nCode: d503201f aa0803e0 aa1f03e1 aa0103e9 (c8e97d02)\n---[ end trace 561d1b49c12cf8a5 ]---\nKernel panic - not syncing: Oops: Fatal exception\n\n## Affected\n\n- `Linux >= 8a062902be725f647dc8da532b04d836546a369a < 93114cbc7cb169f6f26eeaed5286b91bb86b463b`\n- `Linux >= 8a062902be725f647dc8da532b04d836546a369a < 7060e5aac6dc195124c106f49106d653a416323a`\n- `Linux >= 8a062902be725f647dc8da532b04d836546a369a < 3b5d9b7b875968a8a8c99dac45cb85b705c44802`\n- `Linux >= 8a062902be725f647dc8da532b04d836546a369a < 938d5b7a75e18264887387ddf9169db6d8aeef98`\n- `Linux >= 8a062902be725f647dc8da532b04d836546a369a < 1e1c9aa9288a46c342f0f2c5c0b1c0876b9b0276`\n- `Linux >= 8a062902be725f647dc8da532b04d836546a369a < 02b0095e2fbbc060560c1065f86a211d91e27b26`\n- `Linux 5.2`\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":[]}