CVE-2022-49720
block: Fix handling of offline queues in blk_mq_alloc_request_hctx()
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: block: Fix handling of offline queues in blk_mq_alloc_request_hctx() This patch prevents that test nvme/004 triggers the following: UBSAN: array-index-out-of-bounds in block/blk-mq.h:135:9 index 512 is out of range for type 'long unsigned int [512]' Call Trace: show_stack+0x52/0x58 dump_stack_lvl+0x49/0x5e dump_stack+0x10/0x12 ubsan_epilogue+0x9/0x3b __ubsan_handle_out_of_bounds.cold+0x44/0x49 blk_mq_alloc_request_hctx+0x304/0x310 __nvme_submit_sync_cmd+0x70/0x200 [nvme_core] nvmf_connect_io_queue+0x23e/0x2a0 [nvme_fabrics] nvme_loop_connect_io_queues+0x8d/0xb0 [nvme_loop] nvme_loop_create_ctrl+0x58e/0x7d0 [nvme_loop] nvmf_create_ctrl+0x1d7/0x4d0 [nvme_fabrics] nvmf_dev_write+0xae/0x111 [nvme_fabrics] vfs_write+0x144/0x560 ksys_write+0xb7/0x140 __x64_sys_write+0x42/0x50 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.30% · top 78% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 20e4d813931961fe26d26a1e98b3aba6ec00b130 – < 7fa28a7c3d74933a4fc22d341b60927952f31c19
- affected 20e4d813931961fe26d26a1e98b3aba6ec00b130 – < b5e65ef044d627effdc2599040b6d204e003f955
- affected 20e4d813931961fe26d26a1e98b3aba6ec00b130 – < b202a0bd2580ee5b0453772c46d464152fafff73
- affected 20e4d813931961fe26d26a1e98b3aba6ec00b130 – < 14dc7a18abbe4176f5626c13c333670da8e06aa1
- affected 4.16
- unaffected < 4.16
- unaffected 5.10.124 – ≤ 5.10.*
- unaffected 5.15.49 – ≤ 5.15.*
- unaffected 5.18.6 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (4)
- https://git.kernel.org/stable/c/7fa28a7c3d74933a4fc22d341b60927952f31c19 (opens in a new tab)
- https://git.kernel.org/stable/c/b5e65ef044d627effdc2599040b6d204e003f955 (opens in a new tab)
- https://git.kernel.org/stable/c/b202a0bd2580ee5b0453772c46d464152fafff73 (opens in a new tab)
- https://git.kernel.org/stable/c/14dc7a18abbe4176f5626c13c333670da8e06aa1 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49720)Record last updated .