{"id":"CVE-2022-49800","title":"tracing: Fix memory leak in test_gen_synth_cmd() and test_empty_synth_event()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix memory leak in test_gen_synth_cmd() and test_empty_synth_event()\n\ntest_gen_synth_cmd() only free buf in fail path, hence buf will leak\nwhen there is no fai…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 9fe41efaca08416657efa8731c0d47ccb6a3f3eb < 65ba7e7c241122ef0a9e61d1920f2ae9689aa796","Linux >= 9fe41efaca08416657efa8731c0d47ccb6a3f3eb < 07ba4f0603aba288580866394f2916dfe55823a2","Linux >= 9fe41efaca08416657efa8731c0d47ccb6a3f3eb < 0e5baaa181a052d968701bb9c5b1d55847f00942","Linux >= 9fe41efaca08416657efa8731c0d47ccb6a3f3eb < a4527fef9afe5c903c718d0cd24609fe9c754250","Linux 5.6"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:48:41.057276Z"},"published":"2025-05-01","updated":"2026-11-05","sourceUpdated":"2026-11-05T19:49:49.647Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49800","references":[{"url":"https://git.kernel.org/stable/c/65ba7e7c241122ef0a9e61d1920f2ae9689aa796"},{"url":"https://git.kernel.org/stable/c/07ba4f0603aba288580866394f2916dfe55823a2"},{"url":"https://git.kernel.org/stable/c/0e5baaa181a052d968701bb9c5b1d55847f00942"},{"url":"https://git.kernel.org/stable/c/a4527fef9afe5c903c718d0cd24609fe9c754250"}],"tags":["cve.org"],"epss":0.00202,"epssPercentile":0.10137,"ingestedAt":"2026-11-05T22:38:31.598Z","slug":"CVE-2022-49800","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix memory leak in test_gen_synth_cmd() and test_empty_synth_event()\n\ntest_gen_synth_cmd() only free buf in fail path, hence buf will leak\nwhen there is no failure. Add kfree(buf) to prevent the memleak. The\nsame reason and solution in test_empty_synth_event().\n\nunreferenced object 0xffff8881127de000 (size 2048):\n  comm \"modprobe\", pid 247, jiffies 4294972316 (age 78.756s)\n  hex dump (first 32 bytes):\n    20 67 65 6e 5f 73 79 6e 74 68 5f 74 65 73 74 20   gen_synth_test\n    20 70 69 64 5f 74 20 6e 65 78 74 5f 70 69 64 5f   pid_t next_pid_\n  backtrace:\n    [<000000004254801a>] kmalloc_trace+0x26/0x100\n    [<0000000039eb1cf5>] 0xffffffffa00083cd\n    [<000000000e8c3bc8>] 0xffffffffa00086ba\n    [<00000000c293d1ea>] do_one_initcall+0xdb/0x480\n    [<00000000aa189e6d>] do_init_module+0x1cf/0x680\n    [<00000000d513222b>] load_module+0x6a50/0x70a0\n    [<000000001fd4d529>] __do_sys_finit_module+0x12f/0x1c0\n    [<00000000b36c4c0f>] do_syscall_64+0x3f/0x90\n    [<00000000bbf20cf3>] entry_SYSCALL_64_after_hwframe+0x63/0xcd\nunreferenced object 0xffff8881127df000 (size 2048):\n  comm \"modprobe\", pid 247, jiffies 4294972324 (age 78.728s)\n  hex dump (first 32 bytes):\n    20 65 6d 70 74 79 5f 73 79 6e 74 68 5f 74 65 73   empty_synth_tes\n    74 20 20 70 69 64 5f 74 20 6e 65 78 74 5f 70 69  t  pid_t next_pi\n  backtrace:\n    [<000000004254801a>] kmalloc_trace+0x26/0x100\n    [<00000000d4db9a3d>] 0xffffffffa0008071\n    [<00000000c31354a5>] 0xffffffffa00086ce\n    [<00000000c293d1ea>] do_one_initcall+0xdb/0x480\n    [<00000000aa189e6d>] do_init_module+0x1cf/0x680\n    [<00000000d513222b>] load_module+0x6a50/0x70a0\n    [<000000001fd4d529>] __do_sys_finit_module+0x12f/0x1c0\n    [<00000000b36c4c0f>] do_syscall_64+0x3f/0x90\n    [<00000000bbf20cf3>] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\n## Affected\n\n- `Linux >= 9fe41efaca08416657efa8731c0d47ccb6a3f3eb < 65ba7e7c241122ef0a9e61d1920f2ae9689aa796`\n- `Linux >= 9fe41efaca08416657efa8731c0d47ccb6a3f3eb < 07ba4f0603aba288580866394f2916dfe55823a2`\n- `Linux >= 9fe41efaca08416657efa8731c0d47ccb6a3f3eb < 0e5baaa181a052d968701bb9c5b1d55847f00942`\n- `Linux >= 9fe41efaca08416657efa8731c0d47ccb6a3f3eb < a4527fef9afe5c903c718d0cd24609fe9c754250`\n- `Linux 5.6`\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":[]}