GHSA-J6WF-6QH3-CM45

Vulnerability from github – Published: 2025-01-21 12:30 – Updated: 2025-11-03 21:32
VLAI
Details

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

tracing: Have process_string() also allow arrays

In order to catch a common bug where a TRACE_EVENT() TP_fast_assign() assigns an address of an allocated string to the ring buffer and then references it in TP_printk(), which can be executed hours later when the string is free, the function test_event_printk() runs on all events as they are registered to make sure there's no unwanted dereferencing.

It calls process_string() to handle cases in TP_printk() format that has "%s". It returns whether or not the string is safe. But it can have some false positives.

For instance, xe_bo_move() has:

TP_printk("move_lacks_source:%s, migrate object %p [size %zu] from %s to %s device_id:%s", __entry->move_lacks_source ? "yes" : "no", __entry->bo, __entry->size, xe_mem_type_to_name[__entry->old_placement], xe_mem_type_to_name[__entry->new_placement], __get_str(device_id))

Where the "%s" references into xe_mem_type_to_name[]. This is an array of pointers that should be safe for the event to access. Instead of flagging this as a bad reference, if a reference points to an array, where the record field is the index, consider it safe.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-57930"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-21T12:15:26Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Have process_string() also allow arrays\n\nIn order to catch a common bug where a TRACE_EVENT() TP_fast_assign()\nassigns an address of an allocated string to the ring buffer and then\nreferences it in TP_printk(), which can be executed hours later when the\nstring is free, the function test_event_printk() runs on all events as\nthey are registered to make sure there\u0027s no unwanted dereferencing.\n\nIt calls process_string() to handle cases in TP_printk() format that has\n\"%s\". It returns whether or not the string is safe. But it can have some\nfalse positives.\n\nFor instance, xe_bo_move() has:\n\n TP_printk(\"move_lacks_source:%s, migrate object %p [size %zu] from %s to %s device_id:%s\",\n            __entry-\u003emove_lacks_source ? \"yes\" : \"no\", __entry-\u003ebo, __entry-\u003esize,\n            xe_mem_type_to_name[__entry-\u003eold_placement],\n            xe_mem_type_to_name[__entry-\u003enew_placement], __get_str(device_id))\n\nWhere the \"%s\" references into xe_mem_type_to_name[]. This is an array of\npointers that should be safe for the event to access. Instead of flagging\nthis as a bad reference, if a reference points to an array, where the\nrecord field is the index, consider it safe.",
  "id": "GHSA-j6wf-6qh3-cm45",
  "modified": "2025-11-03T21:32:14Z",
  "published": "2025-01-21T12:30:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-57930"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3bcdc9039a6e9e6e47ed689a37b8d57894a3c571"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/631b1e09e213c86d5a4ce23d45c81af473bb0ac7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92bd18c74624e5eb9f96e70076aa46293f4b626f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a64e5295ebc4afdefe69cdf16cc286a60ff8ba4b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/afc6717628f959941d7b33728570568b4af1c4b8"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.