CVE-2022-49176
Detail
Description
In the Linux kernel, the following vulnerability has been resolved:
bfq: fix use-after-free in bfq_dispatch_request
KASAN reports a use-after-free report when doing normal scsi-mq test
[69832.239032] ==================================================================
[69832.241810] BUG: KASAN: use-after-free in bfq_dispatch_request+0x1045/0x44b0
[69832.243267] Read of size 8 at addr ffff88802622ba88 by task kworker/3:1H/155
[69832.244656]
[69832.245007] CPU: 3 PID: 155 Comm: kworker/3:1H Not tainted 5.10.0-10295-g576c6382529e #8
[69832.246626] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[69832.249069] Workqueue: kblockd blk_mq_run_work_fn
[69832.250022] Call Trace:
[69832.250541] dump_stack+0x9b/0xce
[69832.251232] ? bfq_dispatch_request+0x1045/0x44b0
[69832.252243] print_address_description.constprop.6+0x3e/0x60
[69832.253381] ? __cpuidle_text_end+0x5/0x5
[69832.254211] ? vprintk_func+0x6b/0x120
[69832.254994] ? bfq_dispatch_request+0x1045/0x44b0
[69832.255952] ? bfq_dispatch_request+0x1045/0x44b0
[69832.256914] kasan_report.cold.9+0x22/0x3a
[69832.257753] ? bfq_dispatch_request+0x1045/0x44b0
[69832.258755] check_memory_region+0x1c1/0x1e0
[69832.260248] bfq_dispatch_request+0x1045/0x44b0
[69832.261181] ? bfq_bfqq_expire+0x2440/0x2440
[69832.262032] ? blk_mq_delay_run_hw_queues+0xf9/0x170
[69832.263022] __blk_mq_do_dispatch_sched+0x52f/0x830
[69832.264011] ? blk_mq_sched_request_inserted+0x100/0x100
[69832.265101] __blk_mq_sched_dispatch_requests+0x398/0x4f0
[69832.266206] ? blk_mq_do_dispatch_ctx+0x570/0x570
[69832.267147] ? __switch_to+0x5f4/0xee0
[69832.267898] blk_mq_sched_dispatch_requests+0xdf/0x140
[69832.268946] __blk_mq_run_hw_queue+0xc0/0x270
[69832.269840] blk_mq_run_work_fn+0x51/0x60
[69832.278170] process_one_work+0x6d4/0xfe0
[69832.278984] worker_thread+0x91/0xc80
[69832.279726] ? __kthread_parkme+0xb0/0x110
[69832.280554] ? process_one_work+0xfe0/0xfe0
[69832.281414] kthread+0x32d/0x3f0
[69832.282082] ? kthread_park+0x170/0x170
[69832.282849] ret_from_fork+0x1f/0x30
[69832.283573]
[69832.283886] Allocated by task 7725:
[69832.284599] kasan_save_stack+0x19/0x40
[69832.285385] __kasan_kmalloc.constprop.2+0xc1/0xd0
[69832.286350] kmem_cache_alloc_node+0x13f/0x460
[69832.287237] bfq_get_queue+0x3d4/0x1140
[69832.287993] bfq_get_bfqq_handle_split+0x103/0x510
[69832.289015] bfq_init_rq+0x337/0x2d50
[69832.289749] bfq_insert_requests+0x304/0x4e10
[69832.290634] blk_mq_sched_insert_requests+0x13e/0x390
[69832.291629] blk_mq_flush_plug_list+0x4b4/0x760
[69832.292538] blk_flush_plug_list+0x2c5/0x480
[69832.293392] io_schedule_prepare+0xb2/0xd0
[69832.294209] io_schedule_timeout+0x13/0x80
[69832.295014] wait_for_common_io.constprop.1+0x13c/0x270
[69832.296137] submit_bio_wait+0x103/0x1a0
[69832.296932] blkdev_issue_discard+0xe6/0x160
[69832.297794] blk_ioctl_discard+0x219/0x290
[69832.298614] blkdev_common_ioctl+0x50a/0x1750
[69832.304715] blkdev_ioctl+0x470/0x600
[69832.305474] block_ioctl+0xde/0x120
[69832.306232] vfs_ioctl+0x6c/0xc0
[69832.306877] __se_sys_ioctl+0x90/0xa0
[69832.307629] do_syscall_64+0x2d/0x40
[69832.308362] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[69832.309382]
[69832.309701] Freed by task 155:
[69832.310328] kasan_save_stack+0x19/0x40
[69832.311121] kasan_set_track+0x1c/0x30
[69832.311868] kasan_set_free_info+0x1b/0x30
[69832.312699] __kasan_slab_free+0x111/0x160
[69832.313524] kmem_cache_free+0x94/0x460
[69832.314367] bfq_put_queue+0x582/0x940
[69832.315112] __bfq_bfqd_reset_in_service+0x166/0x1d0
[69832.317275] bfq_bfqq_expire+0xb27/0x2440
[69832.318084] bfq_dispatch_request+0x697/0x44b0
[69832.318991] __blk_mq_do_dispatch_sched+0x52f/0x830
[69832.319984] __blk_mq_sched_dispatch_requests+0x398/0x4f0
[69832.321087] blk_mq_sched_dispatch_requests+0xdf/0x140
[69832.322225] __blk_mq_run_hw_queue+0xc0/0x270
[69832.323114] blk_mq_run_work_fn+0x51/0x6
---truncated---
Metrics
CVSS Version 4.0
CVSS Version 3.x
CVSS Version 2.0
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
NVD assessment
not yet provided.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 Severity and Vector Strings:
NVD assessment
not yet provided.
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Weakness Enumeration
CWE-ID
CWE Name
Source
CWE-416
Use After Free
CISA-ADP
Change History
6 change records found show changes
CVE Modified by kernel.org
8/12/2026 8:17:30 PM
Action
Type
Old Value
New Value
Added
CVSS V3.1
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Changed
Affected
Record truncated, showing 2048 of 2211 characters.
View Entire Change Record [{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["block/bfq-iosched.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"74e610b5ee0d95e751280567100509eb11517efa","versionType":"git","status":"affected"},{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"5117c9ff4c2ebae0f5c2c262d42a25a8fbc086e6","versionType":"git","status":"affected"},{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"df6e00b1a53c57dca82c63b5ecbcad5452231bc7","versionType":"git","status":"affected"},{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"080665e2c3cbfc68359b9a348a3546ed9b908e7a","versionType":"git","status":"affected"},{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"5687958bf18f84384d809f521210d0f5deed03b0","versionType":"git","status":"affected"},{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"40b4ba0030e0b02cbacd424ebb9f4c8b0976c786","versionType":"git","status":"affected"},{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"ab552fcb17cc9e4afe0e4ac4df95fc7b30e8490a","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["block/bfq-iosched.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"4.12","status":"affected"},{"version":"0","lessThan":"4.12","versionType":"semver","status":"unaffected"},{"version":"4.19.238","lessThanOrEqual":"4.19.*","versionType":"semver","status":"unaffected"},{"version":"5.4.189","lessThanOrEqual":"5.4.*","versionType":"semver","status":"unaffected"},{"version":"5.10.110","lessThanOrEqual":"5.10.*","versionType":"semver","status":"unaffected"},{"version":"5.15.33","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"5.16.19","lessThanOrEqual":"5.16.*","versionType":"semver","status":"unaffected"},{"version":"5.17.2","lessThanOrEqua
Record truncated, showing 2048 of 2211 characters.
View Entire Change Record [{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["block/bfq-iosched.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"24bfd19bb7890255693ee5cb6dc100d8d215d00b","lessThan":"74e610b5ee0d95e751280567100509eb11517efa","versionType":"git","status":"affected"},{"version":"24bfd19bb7890255693ee5cb6dc100d8d215d00b","lessThan":"5117c9ff4c2ebae0f5c2c262d42a25a8fbc086e6","versionType":"git","status":"affected"},{"version":"24bfd19bb7890255693ee5cb6dc100d8d215d00b","lessThan":"df6e00b1a53c57dca82c63b5ecbcad5452231bc7","versionType":"git","status":"affected"},{"version":"24bfd19bb7890255693ee5cb6dc100d8d215d00b","lessThan":"080665e2c3cbfc68359b9a348a3546ed9b908e7a","versionType":"git","status":"affected"},{"version":"24bfd19bb7890255693ee5cb6dc100d8d215d00b","lessThan":"5687958bf18f84384d809f521210d0f5deed03b0","versionType":"git","status":"affected"},{"version":"24bfd19bb7890255693ee5cb6dc100d8d215d00b","lessThan":"40b4ba0030e0b02cbacd424ebb9f4c8b0976c786","versionType":"git","status":"affected"},{"version":"24bfd19bb7890255693ee5cb6dc100d8d215d00b","lessThan":"ab552fcb17cc9e4afe0e4ac4df95fc7b30e8490a","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["block/bfq-iosched.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"4.15","status":"affected"},{"version":"0","lessThan":"4.15","versionType":"semver","status":"unaffected"},{"version":"4.19.238","lessThanOrEqual":"4.19.*","versionType":"semver","status":"unaffected"},{"version":"5.4.189","lessThanOrEqual":"5.4.*","versionType":"semver","status":"unaffected"},{"version":"5.10.110","lessThanOrEqual":"5.10.*","versionType":"semver","status":"unaffected"},{"version":"5.15.33","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"5.16.19","lessThanOrEqual":"5.16.*","versionType":"semver","status":"unaffected"},{"version":"5.17.2","lessThanOrEqua
CVE Modified by CISA-ADP
6/17/2026 1:17:17 AM
Action
Type
Old Value
New Value
Added
SSVC
{"timestamp":"2025-02-27T18:17:06.859094Z","id":"CVE-2022-49176","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}
CVE Modified by kernel.org
6/17/2026 1:17:17 AM
Action
Type
Old Value
New Value
Added
Affected
Record truncated, showing 2048 of 2211 characters.
View Entire Change Record [{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["block/bfq-iosched.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"74e610b5ee0d95e751280567100509eb11517efa","versionType":"git","status":"affected"},{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"5117c9ff4c2ebae0f5c2c262d42a25a8fbc086e6","versionType":"git","status":"affected"},{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"df6e00b1a53c57dca82c63b5ecbcad5452231bc7","versionType":"git","status":"affected"},{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"080665e2c3cbfc68359b9a348a3546ed9b908e7a","versionType":"git","status":"affected"},{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"5687958bf18f84384d809f521210d0f5deed03b0","versionType":"git","status":"affected"},{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"40b4ba0030e0b02cbacd424ebb9f4c8b0976c786","versionType":"git","status":"affected"},{"version":"aee69d78dec0ffdf82e35d57c626e80dddc314d5","lessThan":"ab552fcb17cc9e4afe0e4ac4df95fc7b30e8490a","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["block/bfq-iosched.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"4.12","status":"affected"},{"version":"0","lessThan":"4.12","versionType":"semver","status":"unaffected"},{"version":"4.19.238","lessThanOrEqual":"4.19.*","versionType":"semver","status":"unaffected"},{"version":"5.4.189","lessThanOrEqual":"5.4.*","versionType":"semver","status":"unaffected"},{"version":"5.10.110","lessThanOrEqual":"5.10.*","versionType":"semver","status":"unaffected"},{"version":"5.15.33","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"5.16.19","lessThanOrEqual":"5.16.*","versionType":"semver","status":"unaffected"},{"version":"5.17.2","lessThanOrEqua
Initial Analysis by NIST
3/25/2025 12:11:10 PM
Action
Type
Old Value
New Value
Added
CPE Configuration
OR
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 4.19.238
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.189
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.33
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.17 up to (excluding) 5.17.2
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.110
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 5.16.19
Added
Reference Type
kernel.org: https://git.kernel.org/stable/c/080665e2c3cbfc68359b9a348a3546ed9b908e7a Types: Patch
Added
Reference Type
kernel.org: https://git.kernel.org/stable/c/40b4ba0030e0b02cbacd424ebb9f4c8b0976c786 Types: Patch
Added
Reference Type
kernel.org: https://git.kernel.org/stable/c/5117c9ff4c2ebae0f5c2c262d42a25a8fbc086e6 Types: Patch
Added
Reference Type
kernel.org: https://git.kernel.org/stable/c/5687958bf18f84384d809f521210d0f5deed03b0 Types: Patch
Added
Reference Type
kernel.org: https://git.kernel.org/stable/c/74e610b5ee0d95e751280567100509eb11517efa Types: Patch
Added
Reference Type
kernel.org: https://git.kernel.org/stable/c/ab552fcb17cc9e4afe0e4ac4df95fc7b30e8490a Types: Patch
Added
Reference Type
kernel.org: https://git.kernel.org/stable/c/df6e00b1a53c57dca82c63b5ecbcad5452231bc7 Types: Patch
CVE Modified by CISA-ADP
2/27/2025 2:15:42 PM
Action
Type
Old Value
New Value
Added
CVSS V3.1
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Added
CWE
CWE-416
New CVE Received from kernel.org
2/26/2025 2:00:54 AM
Action
Type
Old Value
New Value
Added
Description
Record truncated, showing 2048 of 3998 characters.
View Entire Change Record In the Linux kernel, the following vulnerability has been resolved:
bfq: fix use-after-free in bfq_dispatch_request
KASAN reports a use-after-free report when doing normal scsi-mq test
[69832.239032] ==================================================================
[69832.241810] BUG: KASAN: use-after-free in bfq_dispatch_request+0x1045/0x44b0
[69832.243267] Read of size 8 at addr ffff88802622ba88 by task kworker/3:1H/155
[69832.244656]
[69832.245007] CPU: 3 PID: 155 Comm: kworker/3:1H Not tainted 5.10.0-10295-g576c6382529e #8
[69832.246626] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[69832.249069] Workqueue: kblockd blk_mq_run_work_fn
[69832.250022] Call Trace:
[69832.250541] dump_stack+0x9b/0xce
[69832.251232] ? bfq_dispatch_request+0x1045/0x44b0
[69832.252243] print_address_description.constprop.6+0x3e/0x60
[69832.253381] ? __cpuidle_text_end+0x5/0x5
[69832.254211] ? vprintk_func+0x6b/0x120
[69832.254994] ? bfq_dispatch_request+0x1045/0x44b0
[69832.255952] ? bfq_dispatch_request+0x1045/0x44b0
[69832.256914] kasan_report.cold.9+0x22/0x3a
[69832.257753] ? bfq_dispatch_request+0x1045/0x44b0
[69832.258755] check_memory_region+0x1c1/0x1e0
[69832.260248] bfq_dispatch_request+0x1045/0x44b0
[69832.261181] ? bfq_bfqq_expire+0x2440/0x2440
[69832.262032] ? blk_mq_delay_run_hw_queues+0xf9/0x170
[69832.263022] __blk_mq_do_dispatch_sched+0x52f/0x830
[69832.264011] ? blk_mq_sched_request_inserted+0x100/0x100
[69832.265101] __blk_mq_sched_dispatch_requests+0x398/0x4f0
[69832.266206] ? blk_mq_do_dispatch_ctx+0x570/0x570
[69832.267147] ? __switch_to+0x5f4/0xee0
[69832.267898] blk_mq_sched_dispatch_requests+0xdf/0x140
[69832.268946] __blk_mq_run_hw_queue+0xc0/0x270
[69832.269840] blk_mq_run_work_fn+0x51/0x60
[69832.278170] process_one_work+0x6d4/0xfe0
[69832.278984] worker_thread+0x91/0xc80
[69832.279726] ? __kthread_parkme+0xb0/0x110
[69832.280554] ? process_one_work+0xfe0/0xfe0
[69832.281414] kthread+0x32d/0x3f0
[69832.282082
Added
Reference
https://git.kernel.org/stable/c/080665e2c3cbfc68359b9a348a3546ed9b908e7a
Added
Reference
https://git.kernel.org/stable/c/40b4ba0030e0b02cbacd424ebb9f4c8b0976c786
Added
Reference
https://git.kernel.org/stable/c/5117c9ff4c2ebae0f5c2c262d42a25a8fbc086e6
Added
Reference
https://git.kernel.org/stable/c/5687958bf18f84384d809f521210d0f5deed03b0
Added
Reference
https://git.kernel.org/stable/c/74e610b5ee0d95e751280567100509eb11517efa
Added
Reference
https://git.kernel.org/stable/c/ab552fcb17cc9e4afe0e4ac4df95fc7b30e8490a
Added
Reference
https://git.kernel.org/stable/c/df6e00b1a53c57dca82c63b5ecbcad5452231bc7
Quick Info
CVE Dictionary Entry: CVE-2022-49176 NVD
Published Date: 02/26/2025 NVD
Last Modified: 08/12/2026
Source: kernel.org
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