🛡️ CVE-2022-49381 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

jffs2: fix memory leak in jffs2_do_fill_super

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

CVE-2022-49381 is recorded against 2 packages.

  • kernel (from 5.18.0 up to 5.18.4)
  • linux-kernel (from 5.18 up to 5.18.4)

Timeline and source

Published on 26 February 2025 and last revised on 15 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2022-49381 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-02-26
Updated 2026-08-12
Modified 2026-07-15

Affected Packages

Software From version Fixed in
kernel 5.18.0 5.18.4
linux-kernel 5.18 5.18.4

References

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