CVE-2022-49282

Medium

In the Linux kernel, the following vulnerability has been resolved: f2fs: quota: fix loop condition at f2fs_quota_sync() cnt should be passed to sb_has_quota_active() instead of type to check active quota properly. Moreover, when the type is -1, the compiler with enough inline knowledge can discard sb_has_quota_active() check altogether, causing a NULL pointer dereference at the following inode_lock(dqopt->files[cnt]): [ 2.796010] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a0 [ 2.796024] Mem abort info: [ 2.796025] ESR = 0x96000005 [ 2.796028] EC = 0x25: DABT (current EL), IL = 32 bits [ 2.796029] SET = 0, FnV = 0 [ 2.796031] EA = 0, S1PTW = 0 [ 2.796032] Data abort info: [ 2.796034] ISV = 0, ISS = 0x00000005 [ 2.796035] CM = 0, WnR = 0 [ 2.796046] user pgtable: 4k pages, 39-bit VAs, pgdp=00000003370d1000 [ 2.796048] [00000000000000a0] pgd=0000000000000000, pud=0000000000000000 [ 2.796051] Internal error: Oops: 96000005 [#1] PREEMPT SMP [ 2.796056] CPU: 7 PID: 640 Comm: f2fs_ckpt-259:7 Tainted: G S 5.4.179-arter97-r8-64666-g2f16e087f9d8 #1 [ 2.796057] Hardware name: Qualcomm Technologies, Inc. Lahaina MTP lemonadep (DT) [ 2.796059] pstate: 80c00005 (Nzcv daif +PAN +UAO) [ 2.796065] pc : down_write+0x28/0x70 [ 2.796070] lr : f2fs_quota_sync+0x100/0x294 [ 2.796071] sp : ffffffa3f48ffc30 [ 2.796073] x29: ffffffa3f48ffc30 x28: 0000000000000000 [ 2.796075] x27: ffffffa3f6d718b8 x26: ffffffa415fe9d80 [ 2.796077] x25: ffffffa3f7290048 x24: 0000000000000001 [ 2.796078] x23: 0000000000000000 x22: ffffffa3f7290000 [ 2.796080] x21: ffffffa3f72904a0 x20: ffffffa3f7290110 [ 2.796081] x19: ffffffa3f77a9800 x18: ffffffc020aae038 [ 2.796083] x17: ffffffa40e38e040 x16: ffffffa40e38e6d0 [ 2.796085] x15: ffffffa40e38e6cc x14: ffffffa40e38e6d0 [ 2.796086] x13: 00000000000004f6 x12: 00162c44ff493000 [ 2.796088] x11: 0000000000000400 x10: ffffffa40e38c948 [ 2.796090] x9 : 0000000000000000 x8 : 00000000000000a0 [ 2.796091] x7 : 0000000000000000 x6 : 0000d1060f00002a [ 2.796093] x5 : ffffffa3f48ff718 x4 : 000000000000000d [ 2.796094] x3 : 00000000060c0000 x2 : 0000000000000001 [ 2.796096] x1 : 0000000000000000 x0 : 00000000000000a0 [ 2.796098] Call trace: [ 2.796100] down_write+0x28/0x70 [ 2.796102] f2fs_quota_sync+0x100/0x294 [ 2.796104] block_operations+0x120/0x204 [ 2.796106] f2fs_write_checkpoint+0x11c/0x520 [ 2.796107] __checkpoint_and_complete_reqs+0x7c/0xd34 [ 2.796109] issue_checkpoint_thread+0x6c/0xb8 [ 2.796112] kthread+0x138/0x414 [ 2.796114] ret_from_fork+0x10/0x18 [ 2.796117] Code: aa0803e0 aa1f03e1 52800022 aa0103e9 (c8e97d02) [ 2.796120] ---[ end trace 96e942e8eb6a0b53 ]--- [ 2.800116] Kernel panic - not syncing: Fatal exception [ 2.800120] SMP: stopping secondary CPUs

Package Linux Kernel
Published 2025-02-26
Last modified 2025-10-01
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

Weakness type

CWE-476

CVE-2022-49282 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.4.148, 5.10.67, 5.13.19, 5.14.6, 5.15 and later are affected. Fixed in 5.4.189, 5.10.110, 5.15.33, 5.16.19, 5.17.2, 5.18 and their respective stable series.

Affected from
≥ 5.4.148 ≥ 5.10.67 ≥ 5.13.19 ≥ 5.14.6 ≥ 5.15
Fixed in
✓ 5.4.189 5.4.x ✓ 5.10.110 5.10.x ✓ 5.15.33 5.15.x ✓ 5.16.19 5.16.x ✓ 5.17.2 5.17.x ✓ 5.18

References

The following references provide additional information about CVE-2022-49282 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

6 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2022-49282?

    CVE-2022-49282 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 5.4.148 onward and has been patched in 5.4.189, 5.10.110, 5.15.33 and others. CVE-2022-49282 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2022-49282?

    CVE-2022-49282 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-2022-49282?

    Yes — CVE-2022-49282 has been patched. Fixed versions include 5.4.189, 5.10.110, 5.15.33 and others. If you are running Linux kernel 5.4.148 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2022-49282 actively exploited?

    No — CVE-2022-49282 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

  • What is NULL Pointer Dereference (CWE-476)?

    The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. View CWE-476 on MITRE CWE →

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