CVE-2022-49381 Details
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.
A memory leak vulnerability has been identified in the Linux kernel's JFFS2 file system. When the function 'jffs2_iget()' or 'd_make_root()' in 'jffs2_do_fill_super()' encounters an error, it fails to release resources allocated during the file system initialization. This oversight leads to unreferenced objects remaining in memory, as reported by the kernel's memory leak detector. The leaked memory includes 64-byte and 64-kilobyte objects, which are not freed, causing a gradual increase in memory usage that could impact system performance.
To address this vulnerability, the 'jffs2_sum_exit()' function should be called to release the resources that are not being freed, as indicated in the kmemleak report.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Oct 1, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/28048a4cf3813b7cf5cc8cce629dfdc7951cb1c2 | kernel.org | Patch |
| https://git.kernel.org/stable/c/3252d327f977b14663a10967f3b0930d6c325687 | kernel.org | Patch |
| https://git.kernel.org/stable/c/4ba7bbeab8009faf3a726e565d98816593ddd5b0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/4da8763a3d2b684c773b72ed80fad40bc264bc40 | kernel.org | Patch |
| https://git.kernel.org/stable/c/69295267c481545f636b69ff341b8db75aa136b9 | kernel.org | Patch |
| https://git.kernel.org/stable/c/c14adb1cf70a984ed081c67e9d27bc3caad9537c | kernel.org | Patch |
| https://git.kernel.org/stable/c/cf9db013e167bc8fc2ecd7a13ed97a37df0c9dab | kernel.org | Patch |
| https://git.kernel.org/stable/c/d3a4fff1e7e408c32649030daa7c2c42a7e19a95 | kernel.org | Patch |
| https://git.kernel.org/stable/c/ecc53e58596542791e82eff00702f8af7a313f70 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-401 | Missing Release of Memory after Effective Lifetime | [email protected] |
| CWE-401 | Missing Release of Memory after Effective Lifetime | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 2.6.15, < 4.9.318 >= 4.10, < 4.14.283 >= 4.15, < 4.19.247 >= 4.20, < 5.4.198 >= 5.5, < 5.10.122 >= 5.11, < 5.15.47 >= 5.16, < 5.17.15 >= 5.18, < 5.18.4 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Oct 1, 2025 | CVE Modified | CISA-ADP |
| Apr 14, 2025 | Initial Analysis | [email protected] |
| Feb 26, 2025 | New CVE Received | kernel.org |