{"id":"CVE-2022-49801","title":"tracing: Fix memory leak in tracing_read_pipe()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix memory leak in tracing_read_pipe()\n\nkmemleak reports this issue:\n\nunreferenced object 0xffff888105a18900 (size 128):\n  comm \"test_progs\", pid 18933, jiffie…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= efbbdaa22bb78761bff8dfdde027ad04bedd47ce < 2c21ee020ce43d744ecd7f3e9bddfcaafef270ce","Linux >= efbbdaa22bb78761bff8dfdde027ad04bedd47ce < a7d3f8f33c113478737bc61bb32ec5f9a987da7d","Linux >= efbbdaa22bb78761bff8dfdde027ad04bedd47ce < 649e72070cbbb8600eb823833e4748f5a0815116","Linux 840ce9cfc86f89c335625ec297acc0375f82e19b","Linux >= 5.10.190 < 5.11","Linux 5.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:48:50.466595Z"},"published":"2025-05-01","updated":"2026-11-05","sourceUpdated":"2026-11-05T19:49:49.816Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49801","references":[{"url":"https://git.kernel.org/stable/c/2c21ee020ce43d744ecd7f3e9bddfcaafef270ce"},{"url":"https://git.kernel.org/stable/c/a7d3f8f33c113478737bc61bb32ec5f9a987da7d"},{"url":"https://git.kernel.org/stable/c/649e72070cbbb8600eb823833e4748f5a0815116"}],"tags":["cve.org"],"epss":0.00199,"epssPercentile":0.09812,"ingestedAt":"2026-11-05T22:38:31.599Z","slug":"CVE-2022-49801","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix memory leak in tracing_read_pipe()\n\nkmemleak reports this issue:\n\nunreferenced object 0xffff888105a18900 (size 128):\n  comm \"test_progs\", pid 18933, jiffies 4336275356 (age 22801.766s)\n  hex dump (first 32 bytes):\n    25 73 00 90 81 88 ff ff 26 05 00 00 42 01 58 04  %s......&...B.X.\n    03 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [<00000000560143a1>] __kmalloc_node_track_caller+0x4a/0x140\n    [<000000006af00822>] krealloc+0x8d/0xf0\n    [<00000000c309be6a>] trace_iter_expand_format+0x99/0x150\n    [<000000005a53bdb6>] trace_check_vprintf+0x1e0/0x11d0\n    [<0000000065629d9d>] trace_event_printf+0xb6/0xf0\n    [<000000009a690dc7>] trace_raw_output_bpf_trace_printk+0x89/0xc0\n    [<00000000d22db172>] print_trace_line+0x73c/0x1480\n    [<00000000cdba76ba>] tracing_read_pipe+0x45c/0x9f0\n    [<0000000015b58459>] vfs_read+0x17b/0x7c0\n    [<000000004aeee8ed>] ksys_read+0xed/0x1c0\n    [<0000000063d3d898>] do_syscall_64+0x3b/0x90\n    [<00000000a06dda7f>] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\niter->fmt alloced in\n  tracing_read_pipe() -> .. ->trace_iter_expand_format(), but not\nfreed, to fix, add free in tracing_release_pipe()\n\n## Affected\n\n- `Linux >= efbbdaa22bb78761bff8dfdde027ad04bedd47ce < 2c21ee020ce43d744ecd7f3e9bddfcaafef270ce`\n- `Linux >= efbbdaa22bb78761bff8dfdde027ad04bedd47ce < a7d3f8f33c113478737bc61bb32ec5f9a987da7d`\n- `Linux >= efbbdaa22bb78761bff8dfdde027ad04bedd47ce < 649e72070cbbb8600eb823833e4748f5a0815116`\n- `Linux 840ce9cfc86f89c335625ec297acc0375f82e19b`\n- `Linux >= 5.10.190 < 5.11`\n- `Linux 5.12`\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":[]}