Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: sock: redo the psock vs ULP protection check Commit 8a59f9d1e3d4 ("sock: Introduce sk->sk_prot->psock_update_sk_prot()") has moved the inet_csk_has_ulp(sk) check from sk_psock_init() to the new tcp_bpf_update_proto() function. I'm guessing that this was done to allow creating psocks for non-inet sockets. Unfortunately the destruction path for psock includes the ULP unwind, so we need to fail the sk_psock_init() itself. Otherwise if ULP is already present we'll notice that later, and call tcp_update_ulp() with the sk_proto of the ULP itself, which will most likely result in the ULP looping its callbacks.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.13, < 5.15.51 |
References
- https://git.kernel.org/stable/c/72fa0f65b56605b8a9ae9fba2082f2123f7fe017Patch
- https://git.kernel.org/stable/c/922309e50befb0cfa5cb65e4989b7706d6578846Patch
- https://git.kernel.org/stable/c/e34a07c0ae3906f97eb18df50902e2a01c1015b6Patch
FAQ
What is CVE-2022-49732?
CVE-2022-49732 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: sock: redo the psock vs ULP protection check Commit 8a59f9d1e3d4 ("sock: Introduce sk->sk_prot->psock_update_sk_prot()") has moved...
How severe is CVE-2022-49732?
CVE-2022-49732 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-49732?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.