CVE-2025-38462

vsock: Fix transport_{g2h,h2g} TOCTOU

Description

In the Linux kernel, the following vulnerability has been resolved: vsock: Fix transport_{g2h,h2g} TOCTOU vsock_find_cid() and vsock_dev_do_ioctl() may race with module unload. transport_{g2h,h2g} may become NULL after the NULL check. Introduce vsock_transport_local_cid() to protect from a potential null-ptr-deref. KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f] RIP: 0010:vsock_find_cid+0x47/0x90 Call Trace: __vsock_bind+0x4b2/0x720 vsock_bind+0x90/0xe0 __sys_bind+0x14d/0x1e0 __x64_sys_bind+0x6e/0xc0 do_syscall_64+0x92/0x1c0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f] RIP: 0010:vsock_dev_do_ioctl.isra.0+0x58/0xf0 Call Trace: __x64_sys_ioctl+0x12d/0x190 do_syscall_64+0x92/0x1c0 entry_SYSCALL_64_after_hwframe+0x4b/0x53

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/c5496ee685c48ed1cc183cd4263602579bb4a615
https://git.kernel.org/stable/c/80d7dc15805a93d520a249ac6d13d4f4df161c1b
https://git.kernel.org/stable/c/5752d8dbb3dfd7f1a9faf0f65377e60826ea9a17
https://git.kernel.org/stable/c/401239811fa728fcdd53e360a91f157ffd23e1f4
https://git.kernel.org/stable/c/3734d78210cceb2ee5615719a62a5c55ed381ff8
https://git.kernel.org/stable/c/6a1bcab67bea797d83aa9dd948a0ac6ed52d121d
https://git.kernel.org/stable/c/209fd720838aaf1420416494c5505096478156b4

Frequently Asked Questions

What is the severity of CVE-2025-38462?: CVE-2025-38462 has not yet been assigned a CVSS score.
How to fix CVE-2025-38462?: To fix CVE-2025-38462, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-38462 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-38462 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-38462?: CVE-2025-38462 affects Linux Linux, Linux Linux.

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