CVE-2022-49176

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-02-27. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

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---

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

February 26, 2025

Last Modified

August 13, 2026

Advisory Details (7)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

bfq: fix use-after-free in bfq_dispatch_request - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ab552fcb17cc9e4afe0e4ac4df95fc7b30e8490a
generic

bfq: fix use-after-free in bfq_dispatch_request - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/40b4ba0030e0b02cbacd424ebb9f4c8b0976c786
generic

bfq: fix use-after-free in bfq_dispatch_request - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5687958bf18f84384d809f521210d0f5deed03b0
generic

bfq: fix use-after-free in bfq_dispatch_request - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/080665e2c3cbfc68359b9a348a3546ed9b908e7a
generic

bfq: fix use-after-free in bfq_dispatch_request - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/df6e00b1a53c57dca82c63b5ecbcad5452231bc7
generic

bfq: fix use-after-free in bfq_dispatch_request - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5117c9ff4c2ebae0f5c2c262d42a25a8fbc086e6
generic

bfq: fix use-after-free in bfq_dispatch_request - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/74e610b5ee0d95e751280567100509eb11517efa

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.239.251~16.04.1) @ xenial2026-05-30ubuntu
ubuntulinux-tools-gcp-fips-4.15 (4.15.0.2083.81) @ bionic2026-05-30ubuntu
ubuntulowlatency-4.4 (4.4.0-168) @ trusty2026-05-30ubuntu
linuxKernel @ 4.19.238—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (11 versions)5.10.113-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—5.17.3-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—5.17.3-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—5.17.3-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 4× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 158 total refreshes for this CVE.

  1. 2026-09-20 20:13 UTCEPSS rescore
  2. 2026-09-17 12:20 UTCOSV refresh
  3. 2026-09-16 14:05 UTCEPSS rescore
  4. 2026-09-16 05:11 UTCEPSS rescore
  5. 2026-09-15 03:07 UTCEPSS rescore
  6. 2026-09-13 16:44 UTCEPSS rescore
  7. 2026-09-11 14:50 UTCEPSS rescore
  8. 2026-09-11 09:34 UTCEPSS rescore
  9. 2026-09-08 21:57 UTCEPSS rescore
  10. 2026-09-07 15:59 UTCEPSS rescore
  11. 2026-09-06 13:45 UTCEPSS rescore
  12. 2026-09-05 15:25 UTCEPSS rescore
  13. 2026-09-04 13:57 UTCEPSS rescore
  14. 2026-09-04 05:04 UTCEPSS rescore
  15. 2026-09-02 14:09 UTCEPSS rescore
  16. 2026-09-01 13:51 UTCEPSS rescore
  17. 2026-08-30 19:15 UTCEPSS rescore
  18. 2026-08-30 01:19 UTCEPSS rescore
  19. 2026-08-29 12:43 UTCOSV refresh
  20. 2026-08-28 21:38 UTCEPSS rescore
  21. 2026-08-27 14:22 UTCEPSS rescore
  22. 2026-08-26 14:43 UTCEPSS rescore
  23. 2026-08-25 13:46 UTCEPSS rescore
  24. 2026-08-23 00:17 UTCEPSS rescore
  25. 2026-08-21 23:46 UTCEPSS rescore
Show 75 more
  1. 2026-08-20 22:53 UTCEPSS rescore
  2. 2026-08-19 17:01 UTCEPSS rescore
  3. 2026-08-18 13:45 UTCEPSS rescore
  4. 2026-08-17 13:44 UTCEPSS rescore
  5. 2026-08-16 14:53 UTCEPSS rescore
  6. 2026-08-16 02:12 UTCEPSS rescore
  7. 2026-08-15 01:27 UTCEPSS rescore
  8. 2026-08-13 21:58 UTCEPSS rescore
  9. 2026-08-13 00:22 UTCVendor advisory
  10. 2026-08-13 00:22 UTCGHSA enrichment
  11. 2026-08-13 00:06 UTCEG score recompute
  12. 2026-08-13 00:06 UTCVendor advisory
  13. 2026-08-13 00:06 UTCGHSA enrichment
  14. 2026-08-12 13:48 UTCEPSS rescore
  15. 2026-08-09 13:44 UTCEPSS rescore
  16. 2026-08-09 13:44 UTCEPSS rescore
  17. 2026-08-08 16:34 UTCEPSS rescore
  18. 2026-08-07 16:24 UTCEPSS rescore
  19. 2026-08-06 13:44 UTCEPSS rescore
  20. 2026-08-05 19:15 UTCEPSS rescore
  21. 2026-08-05 09:35 UTCEG score recompute
  22. 2026-08-05 09:35 UTCGHSA enrichment
  23. 2026-08-04 15:07 UTCEPSS rescore
  24. 2026-08-04 10:35 UTCEPSS rescore
  25. 2026-08-04 09:47 UTCEG score recompute
  26. 2026-08-04 09:47 UTCVendor advisory
  27. 2026-08-04 09:47 UTCGHSA enrichment
  28. 2026-08-03 10:33 UTCEPSS rescore
  29. 2026-08-01 04:13 UTCEPSS rescore
  30. 2026-08-01 04:13 UTCEPSS rescore
  31. 2026-07-30 16:25 UTCEPSS rescore
  32. 2026-07-30 01:28 UTCEPSS rescore
  33. 2026-07-28 15:34 UTCEPSS rescore
  34. 2026-07-26 14:52 UTCEPSS rescore
  35. 2026-07-26 14:52 UTCEPSS rescore
  36. 2026-07-25 14:16 UTCEPSS rescore
  37. 2026-07-24 14:41 UTCOSV refresh
  38. 2026-07-24 14:15 UTCEPSS rescore
  39. 2026-07-23 14:16 UTCEPSS rescore
  40. 2026-07-23 14:16 UTCEPSS rescore
  41. 2026-07-23 02:16 UTCEG score recompute
  42. 2026-07-22 23:04 UTCEG score recompute
  43. 2026-07-22 14:06 UTCEPSS rescore
  44. 2026-07-22 14:06 UTCEPSS rescore
  45. 2026-07-20 17:05 UTCEPSS rescore
  46. 2026-07-19 14:29 UTCEPSS rescore
  47. 2026-07-19 14:29 UTCEPSS rescore
  48. 2026-07-19 02:27 UTCEPSS rescore
  49. 2026-07-19 02:27 UTCEPSS rescore
  50. 2026-07-18 10:03 UTCEPSS rescore
  51. 2026-07-18 10:03 UTCEPSS rescore
  52. 2026-07-16 17:00 UTCEPSS rescore
  53. 2026-07-15 16:56 UTCEPSS rescore
  54. 2026-07-15 16:56 UTCEPSS rescore
  55. 2026-07-15 01:58 UTCEPSS rescore
  56. 2026-07-15 01:58 UTCEPSS rescore
  57. 2026-07-13 22:28 UTCEPSS rescore
  58. 2026-07-13 22:28 UTCEPSS rescore
  59. 2026-07-13 06:11 UTCEPSS rescore
  60. 2026-07-13 06:11 UTCEPSS rescore
  61. 2026-07-12 05:44 UTCEPSS rescore
  62. 2026-07-11 08:25 UTCEPSS rescore
  63. 2026-07-11 08:25 UTCEPSS rescore
  64. 2026-07-09 19:08 UTCEPSS rescore
  65. 2026-07-08 15:13 UTCEPSS rescore
  66. 2026-07-07 13:44 UTCEPSS rescore
  67. 2026-07-07 09:51 UTCOSV refresh
  68. 2026-07-06 16:25 UTCEPSS rescore
  69. 2026-07-06 02:21 UTCEPSS rescore
  70. 2026-07-05 02:28 UTCEPSS rescore
  71. 2026-07-04 06:29 UTCEPSS rescore
  72. 2026-07-01 15:04 UTCEPSS rescore
  73. 2026-06-30 23:21 UTCEPSS rescore
  74. 2026-06-30 23:20 UTCEPSS rescore
  75. 2026-06-29 14:04 UTCEPSS rescore

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2022-49176?
CVE-2022-49176 is a high vulnerability published on February 26, 2025. In the Linux kernel, the following vulnerability has been resolved: bfq: fix use-after-free in bfqdispatchrequest KASAN reports a use-after-free report when doing normal scsi-mq test [69832.239032] ================================================================== [69832.241810] BUG: KASAN:…
When was CVE-2022-49176 disclosed?
CVE-2022-49176 was first published in the National Vulnerability Database on February 26, 2025, with the most recent update on August 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-49176 actively exploited?
CVE-2022-49176 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 79.6% of all scored CVEs.
What is the CVSS score of CVE-2022-49176?
CVE-2022-49176 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2022-49176?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-49176, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-49176

Explore →

Is Your Infrastructure Affected by CVE-2022-49176?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs