ghsa-8p58-276h-xqq5
Vulnerability from github
Published
2024-12-27 15:31
Modified
2025-01-06 21:30
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

drm/xe/reg_sr: Remove register pool

That pool implementation doesn't really work: if the krealloc happens to move the memory and return another address, the entries in the xarray become invalid, leading to use-after-free later:

BUG: KASAN: slab-use-after-free in xe_reg_sr_apply_mmio+0x570/0x760 [xe]
Read of size 4 at addr ffff8881244b2590 by task modprobe/2753

Allocated by task 2753:
 kasan_save_stack+0x39/0x70
 kasan_save_track+0x14/0x40
 kasan_save_alloc_info+0x37/0x60
 __kasan_kmalloc+0xc3/0xd0
 __kmalloc_node_track_caller_noprof+0x200/0x6d0
 krealloc_noprof+0x229/0x380

Simplify the code to fix the bug. A better pooling strategy may be added back later if needed.

(cherry picked from commit e5283bd4dfecbd3335f43b62a68e24dae23f59e4)

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2024-56652"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-12-27T15:15:25Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/reg_sr: Remove register pool\n\nThat pool implementation doesn\u0027t really work: if the krealloc happens to\nmove the memory and return another address, the entries in the xarray\nbecome invalid, leading to use-after-free later:\n\n\tBUG: KASAN: slab-use-after-free in xe_reg_sr_apply_mmio+0x570/0x760 [xe]\n\tRead of size 4 at addr ffff8881244b2590 by task modprobe/2753\n\n\tAllocated by task 2753:\n\t kasan_save_stack+0x39/0x70\n\t kasan_save_track+0x14/0x40\n\t kasan_save_alloc_info+0x37/0x60\n\t __kasan_kmalloc+0xc3/0xd0\n\t __kmalloc_node_track_caller_noprof+0x200/0x6d0\n\t krealloc_noprof+0x229/0x380\n\nSimplify the code to fix the bug. A better pooling strategy may be added\nback later if needed.\n\n(cherry picked from commit e5283bd4dfecbd3335f43b62a68e24dae23f59e4)",
  "id": "GHSA-8p58-276h-xqq5",
  "modified": "2025-01-06T21:30:50Z",
  "published": "2024-12-27T15:31:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56652"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0193a31a0ca5a0f9e60bb4a86537d46b98111b8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7b028656c29b22fcde1c6ee1df5b28fbba987b5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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