CVE-2023-53261

Description

In the Linux kernel, the following vulnerability has been resolved: coresight: Fix memory leak in acpi_buffer->pointer There are memory leaks reported by kmemleak: ... unreferenced object 0xffff00213c141000 (size 1024): comm "systemd-udevd", pid 2123, jiffies 4294909467 (age 6062.160s) hex dump (first 32 bytes): 04 00 00 00 02 00 00 00 18 10 14 3c 21 00 ff ff ...........<!... 00 00 00 00 00 00 00 00 03 00 00 00 10 00 00 00 ................ backtrace: [<000000004b7c9001>] __kmem_cache_alloc_node+0x2f8/0x348 [<00000000b0fc7ceb>] __kmalloc+0x58/0x108 [<0000000064ff4695>] acpi_os_allocate+0x2c/0x68 [<000000007d57d116>] acpi_ut_initialize_buffer+0x54/0xe0 [<0000000024583908>] acpi_evaluate_object+0x388/0x438 [<0000000017b2e72b>] acpi_evaluate_object_typed+0xe8/0x240 [<000000005df0eac2>] coresight_get_platform_data+0x1b4/0x988 [coresight] ... The ACPI buffer memory (buf.pointer) should be freed. But the buffer is also used after returning from acpi_get_dsd_graph(). Move the temporary variables buf to acpi_coresight_parse_graph(), and free it before the function return to prevent memory leak.

CVSS Metrics

• v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.04%• Percentile: 11%

Techniques & Countermeasures

• CWE-401•Missing Release of Memory after Effective Lifetime

  The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected Systems

• linux•linux

  ≥ 76ffa5ab5b79c250b9744b7f8bdd835db426a1ae, < d1b60e7c9fee34eaedf1fc4e0471f75b33f83a4a | ≥ 76ffa5ab5b79c250b9744b7f8bdd835db426a1ae, < 1a9e02673e2550f5612099e64e8761f0c8fc0f50 | 5.3

• linux•linux_kernel

  ≥ 5.3, < 6.5.3

References (2)

• https://git.kernel.org/stable/c/d1b60e7c9fee34eaedf1fc4e0471f75b33f83a4a
• https://git.kernel.org/stable/c/1a9e02673e2550f5612099e64e8761f0c8fc0f50