CVE-2022-50331
wwan_hwsim: fix possible memory leak in wwan_hwsim_dev_new()
Published 13 mo ago · modified 3 d ago · JSON
Summary
In the Linux kernel, the following vulnerability has been resolved:
wwan_hwsim: fix possible memory leak in wwan_hwsim_dev_new()
Inject fault while probing module, if device_register() fails, but the refcount of kobject is not decreased to 0, the name allocated in dev_set_name() is leaked. Fix this by calling put_device(), so that name can be freed in callback function kobject_cleanup().
unreferenced object 0xffff88810152ad20 (size 8): comm "modprobe", pid 252, jiffies 4294849206 (age 22.713s) hex dump (first 8 bytes): 68 77 73 69 6d 30 00 ff hwsim0.. backtrace: [<000000009c3504ed>] __kmalloc_node_track_caller+0x44/0x1b0 [<00000000c0228a5e>] kvasprintf+0xb5/0x140 [<00000000cff8c21f>] kvasprintf_const+0x55/0x180 [<0000000055a1e073>] kobject_set_name_vargs+0x56/0x150 [<000000000a80b139>] dev_set_name+0xab/0xe0
CISA SSVC assessment
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 d ago
Exploit prediction (EPSS)
0.16% probability of exploitation in the next 30 days, higher than 5% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Affected products
- Linux Linux
Classification
- Weakness
- CWE-401 Missing Release of Memory after Effective Lifetime
- Technology feeds
- Linux kernel (RSS, critical only)
References
- git.kernel.org /stable/c/50c31fa952309536c6e4461ff815ddccc8dff9d5
- git.kernel.org /stable/c/d87973314aba6de80a49f4271dd9be4ddc08e729
- git.kernel.org /stable/c/258ad2fe5ede773625adfda88b173f4123e59f45
Sources
- CVE List: CVE-2022-50331
- NVD: CVE-2022-50331
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