CVE-2022-49807 nvmet: fix a memory leak in nvmet_auth_set_key
A memory leak in the Linux kernel's nvmet authentication module allows attackers to exhaust system memory, potentially causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-49807?
CVE-2022-49807 is a medium-severity memory corruption vulnerability in Linux kernel, published on 1 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
nvmet: fix a memory leak in nvmet_auth_set_key
When changing dhchap secrets we need to release the old secrets as well.
kmemleak complaint: -- unreferenced object 0xffff8c7f44ed8180 (size 64): comm "check", pid 7304, jiffies 4295686133 (age 72034.246s) hex dump (first 32 bytes): 44 48 48 43 2d 31 3a 30 30 3a 4c 64 4c 4f 64 71 DHHC-1:00:LdLOdq 79 56 69 67 77 48 55 32 6d 5a 59 4c 7a 35 59 38 yVigwHU2mZYLz5Y8 backtrace: [<00000000b6fc5071>] kstrdup+0x2e/0x60 [<00000000f0f4633f>] 0xffffffffc0e07ee6 [<0000000053006c05>] 0xffffffffc0dff783 [<00000000419ae922>] configfs_write_iter+0xb1/0x120 [<000000008183c424>] vfs_write+0x2be/0x3c0 [<000000009005a2a5>] ksys_write+0x5f/0xe0 [<00000000cd495c89>] do_syscall_64+0x38/0x90 [<00000000f2a84ac5>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
Weakness: CWE-401
Which versions are affected by CVE-2022-49807?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49807?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-49807 being exploited?
There is no known exploitation of CVE-2022-49807 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49807, GHSA-wx6j-jwh7-wq64, UBUNTU-CVE-2022-49807.