CVE-2025-38462

vsock: Fix transport_{g2h,h2g} TOCTOU

MEDIUM

4.7

CVSS Score

Published: July 25, 2025 at 03:27 PM UTC

Updated: June 17, 2026 at 09:16 AM UTC

2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity

MEDIUM4.7

Exploit prediction

EPSS 0.1%

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

11.0

Linux Kernel · Linux

95%

5.11 ≤ v < 5.15.1895.16 ≤ v < 6.1.1465.5 ≤ v < 5.10.2405.5 ≤ v < 5.15.1895.5 ≤ v < 6.1.1465.5 ≤ v < 6.12.395.5 ≤ v < 6.15.75.5 ≤ v < 6.165.5 ≤ v < 6.6.996.13 ≤ v < 6.15.76.2 ≤ v < 6.6.996.7 ≤ v < 6.12.395.5 6.16 rc1 6.16 rc2 6.16 rc3 6.16 rc4 6.16 rc5c0cfa2d8a788fcf45df5bf4070ab2474c88d543a

Vendor states this is fixed in 209fd720838aaf1420416494c5505096478156b4 (fixed)

Vendor states this is fixed in 3734d78210cceb2ee5615719a62a5c55ed381ff8 (fixed)

Vendor states this is fixed in 401239811fa728fcdd53e360a91f157ffd23e1f4 (fixed)

Vendor states this is fixed in 5752d8dbb3dfd7f1a9faf0f65377e60826ea9a17 (fixed)

Vendor states this is fixed in 6a1bcab67bea797d83aa9dd948a0ac6ed52d121d (fixed)

Vendor states this is fixed in 80d7dc15805a93d520a249ac6d13d4f4df161c1b (fixed)

Vendor states this is fixed in c5496ee685c48ed1cc183cd4263602579bb4a615 (fixed)

Vendor states this is fixed in 5.10.240 (unaffected)

Vendor states this is fixed in 5.15.189 (unaffected)

Vendor states this is fixed in 5.5 (unaffected)

Vendor states this is fixed in 6.1.146 (unaffected)

Vendor states this is fixed in 6.12.39 (unaffected)