ghsa-77v7-59c5-2xxh
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
exfat: add cluster chain loop check for dir
An infinite loop may occur if the following conditions occur due to file system corruption.
(1) Condition for exfat_count_dir_entries() to loop infinitely. - The cluster chain includes a loop. - There is no UNUSED entry in the cluster chain.
(2) Condition for exfat_create_upcase_table() to loop infinitely. - The cluster chain of the root directory includes a loop. - There are no UNUSED entry and up-case table entry in the cluster chain of the root directory.
(3) Condition for exfat_load_bitmap() to loop infinitely. - The cluster chain of the root directory includes a loop. - There are no UNUSED entry and bitmap entry in the cluster chain of the root directory.
(4) Condition for exfat_find_dir_entry() to loop infinitely. - The cluster chain includes a loop. - The unused directory entries were exhausted by some operation.
(5) Condition for exfat_check_dir_empty() to loop infinitely. - The cluster chain includes a loop. - The unused directory entries were exhausted by some operation. - All files and sub-directories under the directory are deleted.
This commit adds checks to break the above infinite loop.
{
"affected": [],
"aliases": [
"CVE-2025-38692"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-04T16:15:37Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nexfat: add cluster chain loop check for dir\n\nAn infinite loop may occur if the following conditions occur due to\nfile system corruption.\n\n(1) Condition for exfat_count_dir_entries() to loop infinitely.\n - The cluster chain includes a loop.\n - There is no UNUSED entry in the cluster chain.\n\n(2) Condition for exfat_create_upcase_table() to loop infinitely.\n - The cluster chain of the root directory includes a loop.\n - There are no UNUSED entry and up-case table entry in the cluster\n chain of the root directory.\n\n(3) Condition for exfat_load_bitmap() to loop infinitely.\n - The cluster chain of the root directory includes a loop.\n - There are no UNUSED entry and bitmap entry in the cluster chain\n of the root directory.\n\n(4) Condition for exfat_find_dir_entry() to loop infinitely.\n - The cluster chain includes a loop.\n - The unused directory entries were exhausted by some operation.\n\n(5) Condition for exfat_check_dir_empty() to loop infinitely.\n - The cluster chain includes a loop.\n - The unused directory entries were exhausted by some operation.\n - All files and sub-directories under the directory are deleted.\n\nThis commit adds checks to break the above infinite loop.",
"id": "GHSA-77v7-59c5-2xxh",
"modified": "2025-09-05T18:31:16Z",
"published": "2025-09-05T18:31:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38692"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4c3cda20c4cf1871e27868d08fda06b79bc7d568"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/868f23286c1a13162330fa6c614fe350f78e3f82"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/99f9a97dce39ad413c39b92c90393bbd6778f3fd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/aa8fe7b7b73d4c9a41bb96cb3fb3092f794ecb33"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e2066ca3ef49a30920d8536fa366b2a183a808ee"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.