CVE-2022-49381

jffs2: fix memory leak in jffs2_do_fill_super

Published Feb 26, 2025 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Description

In the Linux kernel, the following vulnerability has been resolved:

jffs2: fix memory leak in jffs2_do_fill_super

If jffs2_iget() or d_make_root() in jffs2_do_fill_super() returns
an error, we can observe the following kmemleak report:

--------------------------------------------
unreferenced object 0xffff888105a65340 (size 64):
comm "mount", pid 710, jiffies 4302851558 (age 58.239s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff859c45e5>] kmem_cache_alloc_trace+0x475/0x8a0
[<ffffffff86160146>] jffs2_sum_init+0x96/0x1a0
[<ffffffff86140e25>] jffs2_do_mount_fs+0x745/0x2120
[<ffffffff86149fec>] jffs2_do_fill_super+0x35c/0x810
[<ffffffff8614aae9>] jffs2_fill_super+0x2b9/0x3b0
[...]
unreferenced object 0xffff8881bd7f0000 (size 65536):
comm "mount", pid 710, jiffies 4302851558 (age 58.239s)
hex dump (first 32 bytes):
bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................
bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................
backtrace:
[<ffffffff858579ba>] kmalloc_order+0xda/0x110
[<ffffffff85857a11>] kmalloc_order_trace+0x21/0x130
[<ffffffff859c2ed1>] __kmalloc+0x711/0x8a0
[<ffffffff86160189>] jffs2_sum_init+0xd9/0x1a0
[<ffffffff86140e25>] jffs2_do_mount_fs+0x745/0x2120
[<ffffffff86149fec>] jffs2_do_fill_super+0x35c/0x810
[<ffffffff8614aae9>] jffs2_fill_super+0x2b9/0x3b0
[...]
--------------------------------------------

This is because the resources allocated in jffs2_sum_init() are not
released. Call jffs2_sum_exit() to release these resources to solve
the problem.

Analysis

No analysis available yet

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`e631ddba588783edd521c5a89f7b2902772fb691`	affected	< 4ba7bbeab8009faf3a726e565d98816593ddd5b0
`e631ddba588783edd521c5a89f7b2902772fb691`	affected	< 4da8763a3d2b684c773b72ed80fad40bc264bc40
`e631ddba588783edd521c5a89f7b2902772fb691`	affected	< 28048a4cf3813b7cf5cc8cce629dfdc7951cb1c2
`e631ddba588783edd521c5a89f7b2902772fb691`	affected	< d3a4fff1e7e408c32649030daa7c2c42a7e19a95
`e631ddba588783edd521c5a89f7b2902772fb691`	affected	< 3252d327f977b14663a10967f3b0930d6c325687
`e631ddba588783edd521c5a89f7b2902772fb691`	affected	< ecc53e58596542791e82eff00702f8af7a313f70
`e631ddba588783edd521c5a89f7b2902772fb691`	affected	< cf9db013e167bc8fc2ecd7a13ed97a37df0c9dab
`e631ddba588783edd521c5a89f7b2902772fb691`	affected	< 69295267c481545f636b69ff341b8db75aa136b9
`e631ddba588783edd521c5a89f7b2902772fb691`	affected	< c14adb1cf70a984ed081c67e9d27bc3caad9537c

Linux

affected

Version	Status	Constraints
`2.6.15`	affected	—
`0`	unaffected	< 2.6.15
`4.9.318`	unaffected	≤ 4.9.*
`4.14.283`	unaffected	≤ 4.14.*
`4.19.247`	unaffected	≤ 4.19.*
`5.4.198`	unaffected	≤ 5.4.*
`5.10.122`	unaffected	≤ 5.10.*
`5.15.47`	unaffected	≤ 5.15.*
`5.17.15`	unaffected	≤ 5.17.*
`5.18.4`	unaffected	≤ 5.18.*
`5.19`	unaffected	≤ *

Configuration 1 [-]

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

No data.

No data available yet.

Remediation

No remediation available yet

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2022-54848	In the Linux kernel, the following vulnerability has been resolved: jffs2: fix memory leak in jffs2_do_fill_super If jffs2_iget() or d_make_root() in jffs2_do_fill_super() returns an error, we can observe the following kmemleak report: -------------------------------------------- unreferenced object 0xffff888105a65340 (size 64): comm "mount", pid 710, jiffies 4302851558 (age 58.239s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff859c45e5>] kmem_cache_alloc_trace+0x475/0x8a0 [<ffffffff86160146>] jffs2_sum_init+0x96/0x1a0 [<ffffffff86140e25>] jffs2_do_mount_fs+0x745/0x2120 [<ffffffff86149fec>] jffs2_do_fill_super+0x35c/0x810 [<ffffffff8614aae9>] jffs2_fill_super+0x2b9/0x3b0 [...] unreferenced object 0xffff8881bd7f0000 (size 65536): comm "mount", pid 710, jiffies 4302851558 (age 58.239s) hex dump (first 32 bytes): bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ backtrace: [<ffffffff858579ba>] kmalloc_order+0xda/0x110 [<ffffffff85857a11>] kmalloc_order_trace+0x21/0x130 [<ffffffff859c2ed1>] __kmalloc+0x711/0x8a0 [<ffffffff86160189>] jffs2_sum_init+0xd9/0x1a0 [<ffffffff86140e25>] jffs2_do_mount_fs+0x745/0x2120 [<ffffffff86149fec>] jffs2_do_fill_super+0x35c/0x810 [<ffffffff8614aae9>] jffs2_fill_super+0x2b9/0x3b0 [...] -------------------------------------------- This is because the resources allocated in jffs2_sum_init() are not released. Call jffs2_sum_exit() to release these resources to solve the problem.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.268% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://git.kernel.org/stable/c/28048a4cf3813b7cf5cc8cce629dfdc7951cb1c2
https://git.kernel.org/stable/c/3252d327f977b14663a10967f3b0930d6c325687
https://git.kernel.org/stable/c/4ba7bbeab8009faf3a726e565d98816593ddd5b0
https://git.kernel.org/stable/c/4da8763a3d2b684c773b72ed80fad40bc264bc40
https://git.kernel.org/stable/c/69295267c481545f636b69ff341b8db75aa136b9
https://git.kernel.org/stable/c/c14adb1cf70a984ed081c67e9d27bc3caad9537c
https://git.kernel.org/stable/c/cf9db013e167bc8fc2ecd7a13ed97a37df0c9dab
https://git.kernel.org/stable/c/d3a4fff1e7e408c32649030daa7c2c42a7e19a95
https://git.kernel.org/stable/c/ecc53e58596542791e82eff00702f8af7a313f70
https://lore.kernel.org/linux-cve-announce/2025022647-CVE-2022-49381-89d2@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2022-49381
https://www.cve.org/CVERecord?id=CVE-2022-49381

History

Oct 1, 2025 8:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Apr 21, 2025 2:45 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	threat_severity `Low`	threat_severity `Moderate`

Apr 14, 2025 9:00 PM First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Linux Linux linux Kernel
Weaknesses		CWE-401
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel

Feb 28, 2025 1:30 AM Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2025022647-CVE-2022-49381-89d2@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2022-49381 https://www.cve.org/CVERecord?id=CVE-2022-49381
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Low`

Feb 26, 2025 2:45 AM Description updated. Title updated. Added references View changes

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: jffs2: fix memory leak in jffs2_do_fill_super If jffs2_iget() or d_make_root() in jffs2_do_fill_super() returns an error, we can observe the following kmemleak report: -------------------------------------------- unreferenced object 0xffff888105a65340 (size 64): comm "mount", pid 710, jiffies 4302851558 (age 58.239s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff859c45e5>] kmem_cache_alloc_trace+0x475/0x8a0 [<ffffffff86160146>] jffs2_sum_init+0x96/0x1a0 [<ffffffff86140e25>] jffs2_do_mount_fs+0x745/0x2120 [<ffffffff86149fec>] jffs2_do_fill_super+0x35c/0x810 [<ffffffff8614aae9>] jffs2_fill_super+0x2b9/0x3b0 [...] unreferenced object 0xffff8881bd7f0000 (size 65536): comm "mount", pid 710, jiffies 4302851558 (age 58.239s) hex dump (first 32 bytes): bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ backtrace: [<ffffffff858579ba>] kmalloc_order+0xda/0x110 [<ffffffff85857a11>] kmalloc_order_trace+0x21/0x130 [<ffffffff859c2ed1>] __kmalloc+0x711/0x8a0 [<ffffffff86160189>] jffs2_sum_init+0xd9/0x1a0 [<ffffffff86140e25>] jffs2_do_mount_fs+0x745/0x2120 [<ffffffff86149fec>] jffs2_do_fill_super+0x35c/0x810 [<ffffffff8614aae9>] jffs2_fill_super+0x2b9/0x3b0 [...] -------------------------------------------- This is because the resources allocated in jffs2_sum_init() are not released. Call jffs2_sum_exit() to release these resources to solve the problem.
Title		jffs2: fix memory leak in jffs2_do_fill_super
References		https://git.kernel.org/stable/c/28048a4cf3813b7cf5cc8cce629dfdc7951cb1c2 https://git.kernel.org/stable/c/3252d327f977b14663a10967f3b0930d6c325687 https://git.kernel.org/stable/c/4ba7bbeab8009faf3a726e565d98816593ddd5b0 https://git.kernel.org/stable/c/4da8763a3d2b684c773b72ed80fad40bc264bc40 https://git.kernel.org/stable/c/69295267c481545f636b69ff341b8db75aa136b9 https://git.kernel.org/stable/c/c14adb1cf70a984ed081c67e9d27bc3caad9537c https://git.kernel.org/stable/c/cf9db013e167bc8fc2ecd7a13ed97a37df0c9dab https://git.kernel.org/stable/c/d3a4fff1e7e408c32649030daa7c2c42a7e19a95 https://git.kernel.org/stable/c/ecc53e58596542791e82eff00702f8af7a313f70