CVE-2026-23388
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: Squashfs: check metadata block offset is within range Syzkaller reports a "general protection fault in squashfs_copy_data" This is ultimately caused by a corrupted index look-up table, which produces a negative metadata block offset. This is subsequently passed to squashfs_copy_data (via squashfs_read_metadata) where the negative offset causes an out of bounds access. The fix is to check that the offset is within range in squashfs_read_metadata. This will trap this and other cases.
Severity
HIGH
CVSS score
7.1
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-03-25 11:16:39.280000
Last modified
2026-11-05 22:18:22.790000
View original CVE JSON
{
"id": "CVE-2026-23388",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-03-25T11:16:39.280",
"lastModified": "2026-11-05T22:18:22.790",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSquashfs: check metadata block offset is within range\n\nSyzkaller reports a \"general protection fault in squashfs_copy_data\"\n\nThis is ultimately caused by a corrupted index look-up table, which\nproduces a negative metadata block offset.\n\nThis is subsequently passed to squashfs_copy_data (via\nsquashfs_read_metadata) where the negative offset causes an out of bounds\naccess.\n\nThe fix is to check that the offset is within range in\nsquashfs_read_metadata. This will trap this and other cases."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nSquashfs: comprobar que el desplazamiento del bloque de metadatos está dentro del rango\n\nSyzkaller informa de un 'fallo de protección general en squashfs_copy_data'\n\nEsto es causado en última instancia por una tabla de búsqueda de índices corrupta, que produce un desplazamiento de bloque de metadatos negativo.\n\nEsto se pasa posteriormente a squashfs_copy_data (a través de squashfs_read_metadata) donde el desplazamiento negativo causa un acceso fuera de límites.\n\nLa solución es comprobar que el desplazamiento está dentro del rango en squashfs_read_metadata. Esto atrapará este y otros casos."
}
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