CVE-2021-47576
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
scsi: scsi_debug: Sanity check block descriptor length in resp_mode_select()
In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_debug: Sanity check block descriptor length in resp_mode_select() In resp_mode_select() sanity check the block descriptor len to avoid UAF. BUG: KASAN: use-after-free in resp_mode_select+0xa4c/0xb40 drivers/scsi/scsi_debug.c:2509 Read of size 1 at addr ffff888026670f50 by task scsicmd/15032 CPU: 1 PID: 15032 Comm: scsicmd Not tainted 5.15.0-01d0625 #15 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Call Trace: <TASK> dump_stack_lvl+0x89/0xb5 lib/dump_stack.c:107 print_address_description.constprop.9+0x28/0x160 mm/kasan/report.c:257 kasan_report.cold.14+0x7d/0x117 mm/kasan/report.c:443 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report_generic.c:306 resp_mode_select+0xa4c/0xb40 drivers/scsi/scsi_debug.c:2509 schedule_resp+0x4af/0x1a10 drivers/scsi/scsi_debug.c:5483 scsi_debug_queuecommand+0x8c9/0x1e70 drivers/scsi/scsi_debug.c:7537 scsi_queue_rq+0x16b4/0x2d10 drivers/scsi/scsi_lib.c:1521 blk_mq_dispatch_rq_list+0xb9b/0x2700 block/blk-mq.c:1640 __blk_mq_sched_dispatch_requests+0x28f/0x590 block/blk-mq-sched.c:325 blk_mq_sched_dispatch_requests+0x105/0x190 block/blk-mq-sched.c:358 __blk_mq_run_hw_queue+0xe5/0x150 block/blk-mq.c:1762 __blk_mq_delay_run_hw_queue+0x4f8/0x5c0 block/blk-mq.c:1839 blk_mq_run_hw_queue+0x18d/0x350 block/blk-mq.c:1891 blk_mq_sched_insert_request+0x3db/0x4e0 block/blk-mq-sched.c:474 blk_execute_rq_nowait+0x16b/0x1c0 block/blk-exec.c:63 sg_common_write.isra.18+0xeb3/0x2000 drivers/scsi/sg.c:837 sg_new_write.isra.19+0x570/0x8c0 drivers/scsi/sg.c:775 sg_ioctl_common+0x14d6/0x2710 drivers/scsi/sg.c:941 sg_ioctl+0xa2/0x180 drivers/scsi/sg.c:1166 __x64_sys_ioctl+0x19d/0x220 fs/ioctl.c:52 do_syscall_64+0x3a/0x80 arch/x86/entry/common.c:50 entry_SYSCALL_64_after_hwframe+0x44/0xae arch/x86/entry/entry_64.S:113
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 231839102b54512ced7d3ee7fc9b8bcf5e3b583b | affected | git | adcecd50da6cab7b4957cba0606771dcc846c5a9 | Unavailable | None listed |
| 231839102b54512ced7d3ee7fc9b8bcf5e3b583b | affected | git | 90491283b4064220682e4b0687d07b05df01e3bf | Unavailable | None listed |
| 231839102b54512ced7d3ee7fc9b8bcf5e3b583b | affected | git | 04181973c38f3d6a353f9246dcf7fee08024fd9e | Unavailable | None listed |
| 231839102b54512ced7d3ee7fc9b8bcf5e3b583b | affected | git | b847ecff850719c46c95acd25a0d555dfd16e10d | Unavailable | None listed |
| 231839102b54512ced7d3ee7fc9b8bcf5e3b583b | affected | git | a9078e791426c2cbbdf28a320c3670f6e0a611e6 | Unavailable | None listed |
| 231839102b54512ced7d3ee7fc9b8bcf5e3b583b | affected | git | dfc3fff63793c571147930b13c0f8c689c4281ac | Unavailable | None listed |
| 231839102b54512ced7d3ee7fc9b8bcf5e3b583b | affected | git | e0a2c28da11e2c2b963fc01d50acbf03045ac732 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.19 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.19 | Unavailable | None listed |
| 4.9.294 | unaffected | semver | Unavailable | 4.9.* | None listed |
| 4.14.259 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.222 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.168 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.88 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.11 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 5.16 | unaffected | original_commit_for_fix | Unavailable | * | None listed |