CVE-2025-39998
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 0.16% probability · 6th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/27e06650a5eafe832a90fd2604f0c5e920857fae
- https://git.kernel.org/stable/c/4b292286949588bd2818e66ff102db278de8dd26
- https://git.kernel.org/stable/c/53c6351597e6a17ec6619f6f060d54128cb9a187
- https://git.kernel.org/stable/c/764a91e2fc9639e07aac93bc70e387e6b1e33084
- https://git.kernel.org/stable/c/a150275831b765b0f1de8b8ff52ec5c6933ac15d
- https://git.kernel.org/stable/c/ddc79fba132b807ff775467acceaf48b456e008b
- https://git.kernel.org/stable/c/e6eeee5dc0d9221ff96d1b229b1d0222c8871b84
- https://git.kernel.org/stable/c/e73fe0eefac3e15bf88fb5b4afae4c76215ee4d4
- https://git.kernel.org/stable/c/f03aa5e39da7d045615b3951d2a6ca1d7132f881
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.