fkie_cve-2025-21879
Vulnerability from fkie_nvd
Published
2025-03-27 15:15
Modified
2025-07-06 10:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix use-after-free on inode when scanning root during em shrinking
At btrfs_scan_root() we are accessing the inode's root (and fs_info) in a
call to btrfs_fs_closing() after we have scheduled the inode for a delayed
iput, and that can result in a use-after-free on the inode in case the
cleaner kthread does the iput before we dereference the inode in the call
to btrfs_fs_closing().
Fix this by using the fs_info stored already in a local variable instead
of doing inode->root->fs_info.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | 6.14 | |
| linux | linux_kernel | 6.14 | |
| linux | linux_kernel | 6.14 | |
| linux | linux_kernel | 6.14 |
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix use-after-free on inode when scanning root during em shrinking\n\nAt btrfs_scan_root() we are accessing the inode\u0027s root (and fs_info) in a\ncall to btrfs_fs_closing() after we have scheduled the inode for a delayed\niput, and that can result in a use-after-free on the inode in case the\ncleaner kthread does the iput before we dereference the inode in the call\nto btrfs_fs_closing().\n\nFix this by using the fs_info stored already in a local variable instead\nof doing inode-\u003eroot-\u003efs_info."
},
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"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: se corrige el use-after-free en el inodo al escanear la ra\u00edz durante la reducci\u00f3n de em. En btrfs_scan_root(), accedemos a la ra\u00edz del inodo (y a fs_info) en una llamada a btrfs_fs_closing() despu\u00e9s de haber programado el inodo para una entrada retrasada, lo que puede resultar en un use-after-free en el inodo en caso de que el kthread m\u00e1s limpio realice la entrada antes de que desreferenciamos el inodo en la llamada a btrfs_fs_closing(). Se soluciona esto usando la fs_info ya almacenada en una variable local en lugar de hacer inode-\u0026gt;root-\u0026gt;fs_info."
}
],
"id": "CVE-2025-21879",
"lastModified": "2025-07-06T10:15:23.260",
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"attackComplexity": "LOW",
"attackVector": "LOCAL",
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"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"published": "2025-03-27T15:15:55.790",
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"vulnStatus": "Modified",
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"value": "CWE-416"
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- 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.
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