CVE-2025-39998scsi: target: target_core_configfs: Add length check to avoid buffer overflow
Updated under an hour ago ()
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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
- 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 before e6eeee5dc0d9221ff96d1b229b1d0222c8871b84; from c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 before 764a91e2fc9639e07aac93bc70e387e6b1e33084; from c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 before ddc79fba132b807ff775467acceaf48b456e008b; from c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 before e73fe0eefac3e15bf88fb5b4afae4c76215ee4d4; from c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 before f03aa5e39da7d045615b3951d2a6ca1d7132f881; from c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 before 53c6351597e6a17ec6619f6f060d54128cb9a187; from c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 before 4b292286949588bd2818e66ff102db278de8dd26; from c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 before a150275831b765b0f1de8b8ff52ec5c6933ac15d; and 1 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/e6eeee5dc0d9221ff96d1b229b1d0222c8871b84
- https://git.kernel.org/stable/c/764a91e2fc9639e07aac93bc70e387e6b1e33084
- https://git.kernel.org/stable/c/ddc79fba132b807ff775467acceaf48b456e008b
- https://git.kernel.org/stable/c/e73fe0eefac3e15bf88fb5b4afae4c76215ee4d4
- https://git.kernel.org/stable/c/f03aa5e39da7d045615b3951d2a6ca1d7132f881
- https://git.kernel.org/stable/c/53c6351597e6a17ec6619f6f060d54128cb9a187
- https://git.kernel.org/stable/c/4b292286949588bd2818e66ff102db278de8dd26
- https://git.kernel.org/stable/c/a150275831b765b0f1de8b8ff52ec5c6933ac15d
- https://git.kernel.org/stable/c/27e06650a5eafe832a90fd2604f0c5e920857fae
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.