scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show()

Summary

In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show() The function lio_target_nacl_info_show() uses sprintf() in a loop to print details for every iSCSI connection in a session without checking for the buffer length. With enough iSCSI connections it's possible to overflow the buffer provided by configfs and corrupt the memory. This patch replaces sprintf() with sysfs_emit_at() that checks for buffer boundries.

Timeline

1. Oct 7, 2025, 3:21 PM UTCCVE published
2. Oct 15, 2026, 9:36 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Oct 15, 2026, 9:41 PM UTCRecord last updated

Affected versions

• Linux Linux

  From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in df349e84c2cb0dd05d98c8e1189c26ab4b116083; From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in 114b44dddea1f8f99576de3c0e6e9059012002fc; From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in 2cbe6a88fbdd6e8aeab358eef61472e2de43d6f6; From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in bbe3ff47bf09db8956bc2eeb49d2d514d256ad2a; From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in 5353df78c22623b42a71d51226d228a8413097e2; From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in 4738bf8b2d3635c2944b81b2a84d97b8c8b0978d; From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in 0cac6cbb9908309352a5d30c1876882771d3da50; From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in 801f287c93ff95582b0a2d2163f12870a2f076d4

• Linux Linux

  3.1

• KernelLinux

  From 3.1.0 · fixed in 4.14.326; From 4.15.0 · fixed in 4.19.295; From 4.20.0 · fixed in 5.4.257; From 5.5.0 · fixed in 5.10.197; From 5.11.0 · fixed in 5.15.133; From 5.16.0 · fixed in 6.1.55; From 6.2.0 · fixed in 6.5.5

References 8