In the Linux kernel, the following vulnerability has been resolved:
scsi: target: target_core_configfs: Add length check to avoid buffer overflow
A buffer overflow arises from the usage of snprintf to write into the
buffer "buf" in target_lu_gp_members_show function located in
/drivers/target/target_core_configfs.c. This buffer is allocated with
size LU_GROUP_NAME_BUF (256 bytes).
snprintf(...) formats multiple strings into buf with the HBA name
(hba->hba_group.cg_item), a slash character, a devicename (dev->
dev_group.cg_item) and a newline character, the total formatted string
length may exceed the buffer size of 256 bytes.
Since snprintf() returns the total number of bytes that would have been
written (the length of %s/%sn ), this value may exceed the buffer length
(256 bytes) passed to memcpy(), this will ultimately cause function
memcpy reporting a buffer overflow error.
An additional check of the return value of snprintf() can avoid this
buffer overflow.
Metrics
Affected Vendors & Products
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References
History
Thu, 16 Oct 2025 00:15:00 +0000
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threat_severity
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cvssV3_1
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Wed, 15 Oct 2025 10:45:00 +0000
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Wed, 15 Oct 2025 08:15:00 +0000
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| Description | In the Linux kernel, the following vulnerability has been resolved: scsi: target: target_core_configfs: Add length check to avoid buffer overflow A buffer overflow arises from the usage of snprintf to write into the buffer "buf" in target_lu_gp_members_show function located in /drivers/target/target_core_configfs.c. This buffer is allocated with size LU_GROUP_NAME_BUF (256 bytes). snprintf(...) formats multiple strings into buf with the HBA name (hba->hba_group.cg_item), a slash character, a devicename (dev-> dev_group.cg_item) and a newline character, the total formatted string length may exceed the buffer size of 256 bytes. Since snprintf() returns the total number of bytes that would have been written (the length of %s/%sn ), this value may exceed the buffer length (256 bytes) passed to memcpy(), this will ultimately cause function memcpy reporting a buffer overflow error. An additional check of the return value of snprintf() can avoid this buffer overflow. | |
| Title | scsi: target: target_core_configfs: Add length check to avoid buffer overflow | |
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MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2025-10-15T07:58:22.354Z
Updated: 2025-10-15T10:22:28.327Z
Reserved: 2025-04-16T07:20:57.151Z
Link: CVE-2025-39998
Vulnrichment
No data.
NVD
Status : Awaiting Analysis
Published: 2025-10-15T08:15:38.077
Modified: 2025-10-16T15:28:59.610
Link: CVE-2025-39998
Redhat