CVE-2022-48697: nvmet: fix a use-after-free

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-03 · updated 2026-08-04
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: nvmet: fix a use-after-free Fix the following use-after-free complaint triggered by blktests nvme/004: BUG: KASAN: user-memory-access in blk_mq_complete_request_remote+0xac/0x350 Read of size 4 at addr 0000607bd1835943 by task kworker/13:1/460 Workqueue: nvmet-wq nvme_loop_execute_work [nvme_loop] Call Trace: show_stack+0x52/0x58 dump_stack_lvl+0x49/0x5e print_report.cold+0x36/0x1e2 kasan_report+0xb9/0xf0 __asan_load4+0x6b/0x80 blk_mq_complete_request_remote+0xac/0x350 nvme_loop_queue_response+0x1df/0x275 [nvme_loop] __nvmet_req_complete+0x132/0x4f0 [nvmet] nvmet_req_complete+0x15/0x40 [nvmet] nvmet_execute_io_connect+0x18a/0x1f0 [nvmet] nvme_loop_execute_work+0x20/0x30 [nvme_loop] process_one_work+0x56e/0xa70 worker_thread+0x2d1/0x640 kthread+0x183/0x1c0 ret_from_fork+0x1f/0x30

Affected products

Linux kernel: from 4.8 before 4.19.260; from 4.20 before 5.4.213; from 5.5 before 5.10.143; from 5.11 before 5.15.68; from 5.16 before 5.19.9; 6.0-rc1, 6.0-rc2, 6.0-rc3, 6.0-rc4 — fixed in 4.19.260, 5.10.143, 5.15.68, 5.19.9, 5.4.213

How to fix

Upgrade to a fixed version: Linux kernel 4.19.260, 5.10.143, 5.15.68, 5.19.9. Check the vendor advisory for mitigations.

References

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