scsi: target: core: Fix null-ptr-deref in target_alloc_device()

Summary

In the Linux kernel, the following vulnerability has been resolved: scsi: target: core: Fix null-ptr-deref in target_alloc_device() There is a null-ptr-deref issue reported by KASAN: BUG: KASAN: null-ptr-deref in target_alloc_device+0xbc4/0xbe0 [target_core_mod] ... kasan_report+0xb9/0xf0 target_alloc_device+0xbc4/0xbe0 [target_core_mod] core_dev_setup_virtual_lun0+0xef/0x1f0 [target_core_mod] target_core_init_configfs+0x205/0x420 [target_core_mod] do_one_initcall+0xdd/0x4e0 ... entry_SYSCALL_64_after_hwframe+0x76/0x7e In target_alloc_device(), if allocing memory for dev queues fails, then dev will be freed by dev->transport->free_device(), but dev->transport is not initialized at that time, which will lead to a null pointer reference problem. Fixing this bug by freeing dev with hba->backend->ops->free_device().

Timeline

1. Nov 7, 2024, 9:31 AM UTCCVE published
2. Oct 1, 2025, 8:20 PM UTCCISA SSVC assessment

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

3. Oct 15, 2026, 12:57 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 008b936bbde3e87a611b3828a0d5d2a4f99026a0 · fixed in 8c1e6717f60d31f8af3937c23c4f1498529584e1; From 1526d9f10c6184031e42afad0adbdde1213e8ad1 · fixed in 39e02fa90323243187c91bb3e8f2f5f6a9aacfc7; From 1526d9f10c6184031e42afad0adbdde1213e8ad1 · fixed in 895ab729425ef9bf3b6d2f8d0853abe64896f314; From 1526d9f10c6184031e42afad0adbdde1213e8ad1 · fixed in b80e9bc85bd9af378e7eac83e15dd129557bbdb6; From 1526d9f10c6184031e42afad0adbdde1213e8ad1 · fixed in 14a6a2adb440e4ae97bee73b2360946bd033dadd; From 1526d9f10c6184031e42afad0adbdde1213e8ad1 · fixed in fca6caeb4a61d240f031914413fcc69534f6dc03; From 5.10.180 · fixed in 5.10.229

• Linux Linux

  5.11

• KernelLinux

  fixed in 5.10.229; From 5.11.0 · fixed in 5.15.170; fixed in 6.1.115; From 5.16.0 · fixed in 6.6.59; From 6.2.0 · fixed in 6.11.6

References 6