CVE-2025-38462 Information

Jul 26, 2025 cve

Description

In the Linux kernel the following vulnerability has been resolved:

vsock: Fix transport_g2hh2g TOCTOU

vsock_find_cid() and vsock_dev_do_ioctl() may race with module unload. transport_g2hh2g 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

Reference

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

CNNVD-202507-3313 (Published: 2025-07-25)

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