vulnerability
Ubuntu: (CVE-2022-49801): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:N/I:N/A:C) | May 1, 2025 | May 8, 2025 | Nov 13, 2025 |
Description
In the Linux kernel, the following vulnerability has been resolved:
tracing: Fix memory leak in tracing_read_pipe()
kmemleak reports this issue:
unreferenced object 0xffff888105a18900 (size 128):
comm "test_progs", pid 18933, jiffies 4336275356 (age 22801.766s)
hex dump (first 32 bytes):
25 73 00 90 81 88 ff ff 26 05 00 00 42 01 58 04 %s......&...B.X.
03 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000560143a1>] __kmalloc_node_track_caller+0x4a/0x140
[<000000006af00822>] krealloc+0x8d/0xf0
[<00000000c309be6a>] trace_iter_expand_format+0x99/0x150
[<000000005a53bdb6>] trace_check_vprintf+0x1e0/0x11d0
[<0000000065629d9d>] trace_event_printf+0xb6/0xf0
[<000000009a690dc7>] trace_raw_output_bpf_trace_printk+0x89/0xc0
[<00000000d22db172>] print_trace_line+0x73c/0x1480
[<00000000cdba76ba>] tracing_read_pipe+0x45c/0x9f0
[<0000000015b58459>] vfs_read+0x17b/0x7c0
[<000000004aeee8ed>] ksys_read+0xed/0x1c0
[<0000000063d3d898>] do_syscall_64+0x3b/0x90
[<00000000a06dda7f>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
iter->fmt alloced in
tracing_read_pipe() -> .. ->trace_iter_expand_format(), but not
freed, to fix, add free in tracing_release_pipe()
Solutions
References
- CVE-2022-49801
- https://attackerkb.com/topics/CVE-2022-49801
- CWE-401
- URL-https://git.kernel.org/linus/649e72070cbbb8600eb823833e4748f5a0815116
- URL-https://git.kernel.org/stable/c/2c21ee020ce43d744ecd7f3e9bddfcaafef270ce
- URL-https://git.kernel.org/stable/c/649e72070cbbb8600eb823833e4748f5a0815116
- URL-https://git.kernel.org/stable/c/a7d3f8f33c113478737bc61bb32ec5f9a987da7d
- URL-https://www.cve.org/CVERecord?id=CVE-2022-49801
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