What is CVE-2022-49522?

CVE-2022-49522 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 3.18 onward and patched in 5.4.198, 5.10.121, 5.15.46 and others. CVE-2022-49522 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-49522?

CVE-2022-49522 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2022-49522?

Yes, CVE-2022-49522 has been patched. Fixed versions include 5.4.198, 5.10.121, 5.15.46 and others. If you are running Linux kernel 3.18 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-49522 actively exploited?

CVE-2022-49522 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2022-49522

Medium

In the Linux kernel, the following vulnerability has been resolved: mmc: jz4740: Apply DMA engine limits to maximum segment size Do what is done in other DMA-enabled MMC host drivers (cf. host/mmci.c) and limit the maximum segment size based on the DMA engine's capabilities. This is needed to avoid warnings like the following with CONFIG_DMA_API_DEBUG=y. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 21 at kernel/dma/debug.c:1162 debug_dma_map_sg+0x2f4/0x39c DMA-API: jz4780-dma 13420000.dma-controller: mapping sg segment longer than device claims to support [len=98304] [max=65536] CPU: 0 PID: 21 Comm: kworker/0:1H Not tainted 5.18.0-rc1 #19 Workqueue: kblockd blk_mq_run_work_fn Stack : 81575aec 00000004 80620000 80620000 80620000 805e7358 00000009 801537ac 814c832c 806276e3 806e34b4 80620000 81575aec 00000001 81575ab8 09291444 00000000 00000000 805e7358 81575958 ffffffea 8157596c 00000000 636f6c62 6220646b 80387a70 0000000f 6d5f6b6c 80620000 00000000 81575ba4 00000009 805e170c 80896640 00000001 00010000 00000000 00000000 00006098 806e0000 ... Call Trace: [<80107670>] show_stack+0x84/0x120 [<80528cd8>] __warn+0xb8/0xec [<80528d78>] warn_slowpath_fmt+0x6c/0xb8 [<8016f1d4>] debug_dma_map_sg+0x2f4/0x39c [<80169d4c>] __dma_map_sg_attrs+0xf0/0x118 [<8016a27c>] dma_map_sg_attrs+0x14/0x28 [<804f66b4>] jz4740_mmc_prepare_dma_data+0x74/0xa4 [<804f6714>] jz4740_mmc_pre_request+0x30/0x54 [<804f4ff4>] mmc_blk_mq_issue_rq+0x6e0/0x7bc [<804f5590>] mmc_mq_queue_rq+0x220/0x2d4 [<8038b2c0>] blk_mq_dispatch_rq_list+0x480/0x664 [<80391040>] blk_mq_do_dispatch_sched+0x2dc/0x370 [<80391468>] __blk_mq_sched_dispatch_requests+0xec/0x164 [<80391540>] blk_mq_sched_dispatch_requests+0x44/0x94 [<80387900>] __blk_mq_run_hw_queue+0xb0/0xcc [<80134c14>] process_one_work+0x1b8/0x264 [<80134ff8>] worker_thread+0x2ec/0x3b8 [<8013b13c>] kthread+0x104/0x10c [<80101dcc>] ret_from_kernel_thread+0x14/0x1c ---[ end trace 0000000000000000 ]---

Package Linux Kernel

Published 2025-02-26

Last modified 2025-10-21

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 3.18 and later are affected. Fixed in 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.19 and their respective stable series.

Affected from

≥ 3.18

Fixed in

✓ 5.4.198 5.4.x ✓ 5.10.121 5.10.x ✓ 5.15.46 5.15.x ✓ 5.17.14 5.17.x ✓ 5.18.3 5.18.x ✓ 5.19

References

The following references provide additional information about CVE-2022-49522 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/353298cadbd4c7d8e8a16d6000066414694933c3
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7923f95997a79cef2ad161a2facae64c25a0bca0
Patch
Kernel patch commit
https://git.kernel.org/stable/c/807f90f1960a59dc557542b818c484a8db9ac978
Patch

6 patch commits total View all on NVD

Details

CVE ID CVE-2022-49522

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-02-26

Modified 2025-10-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2022-49522?

CVE-2022-49522 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 3.18 onward and has been patched in 5.4.198, 5.10.121, 5.15.46 and others. CVE-2022-49522 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-49522?

CVE-2022-49522 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2022-49522?

Yes — CVE-2022-49522 has been patched. Fixed versions include 5.4.198, 5.10.121, 5.15.46 and others. If you are running Linux kernel 3.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-49522 actively exploited?

No — CVE-2022-49522 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.