{"id":"CVE-2025-39998","title":"scsi: target: target_core_configfs: Add length check to avoid buffer overflow","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: target_core_configfs: Add length check to avoid buffer overflow\n\nA buffer overflow arises from the usage of snprintf to write into the\nbuffer \"buf\" in tar…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < e6eeee5dc0d9221ff96d1b229b1d0222c8871b84","Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < 764a91e2fc9639e07aac93bc70e387e6b1e33084","Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < ddc79fba132b807ff775467acceaf48b456e008b","Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < e73fe0eefac3e15bf88fb5b4afae4c76215ee4d4","Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < f03aa5e39da7d045615b3951d2a6ca1d7132f881","Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < 53c6351597e6a17ec6619f6f060d54128cb9a187","Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < 4b292286949588bd2818e66ff102db278de8dd26","Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < a150275831b765b0f1de8b8ff52ec5c6933ac15d","Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < 27e06650a5eafe832a90fd2604f0c5e920857fae","Linux 2.6.38"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-15T21:56:02.868317Z"},"published":"2025-10-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T22:02:35.977Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-39998","references":[{"url":"https://git.kernel.org/stable/c/e6eeee5dc0d9221ff96d1b229b1d0222c8871b84"},{"url":"https://git.kernel.org/stable/c/764a91e2fc9639e07aac93bc70e387e6b1e33084"},{"url":"https://git.kernel.org/stable/c/ddc79fba132b807ff775467acceaf48b456e008b"},{"url":"https://git.kernel.org/stable/c/e73fe0eefac3e15bf88fb5b4afae4c76215ee4d4"},{"url":"https://git.kernel.org/stable/c/f03aa5e39da7d045615b3951d2a6ca1d7132f881"},{"url":"https://git.kernel.org/stable/c/53c6351597e6a17ec6619f6f060d54128cb9a187"},{"url":"https://git.kernel.org/stable/c/4b292286949588bd2818e66ff102db278de8dd26"},{"url":"https://git.kernel.org/stable/c/a150275831b765b0f1de8b8ff52ec5c6933ac15d"},{"url":"https://git.kernel.org/stable/c/27e06650a5eafe832a90fd2604f0c5e920857fae"}],"tags":["cve.org"],"epss":0.00173,"epssPercentile":0.06739,"ingestedAt":"2026-10-15T22:48:25.536Z","slug":"CVE-2025-39998","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: target_core_configfs: Add length check to avoid buffer overflow\n\nA buffer overflow arises from the usage of snprintf to write into the\nbuffer \"buf\" in target_lu_gp_members_show function located in\n/drivers/target/target_core_configfs.c. This buffer is allocated with\nsize LU_GROUP_NAME_BUF (256 bytes).\n\nsnprintf(...) formats multiple strings into buf with the HBA name\n(hba->hba_group.cg_item), a slash character, a devicename (dev->\ndev_group.cg_item) and a newline character, the total formatted string\nlength may exceed the buffer size of 256 bytes.\n\nSince snprintf() returns the total number of bytes that would have been\nwritten (the length of %s/%sn ), this value may exceed the buffer length\n(256 bytes) passed to memcpy(), this will ultimately cause function\nmemcpy reporting a buffer overflow error.\n\nAn additional check of the return value of snprintf() can avoid this\nbuffer overflow.\n\n## Affected\n\n- `Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < e6eeee5dc0d9221ff96d1b229b1d0222c8871b84`\n- `Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < 764a91e2fc9639e07aac93bc70e387e6b1e33084`\n- `Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < ddc79fba132b807ff775467acceaf48b456e008b`\n- `Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < e73fe0eefac3e15bf88fb5b4afae4c76215ee4d4`\n- `Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < f03aa5e39da7d045615b3951d2a6ca1d7132f881`\n- `Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < 53c6351597e6a17ec6619f6f060d54128cb9a187`\n- `Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < 4b292286949588bd2818e66ff102db278de8dd26`\n- `Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < a150275831b765b0f1de8b8ff52ec5c6933ac15d`\n- `Linux >= c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 < 27e06650a5eafe832a90fd2604f0c5e920857fae`\n- `Linux 2.6.38`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}