VulnerabilityPublished 25 Jul 2025Updated 5 Nov 2026

CVE-2025-38462: Linux kernel · vsock: Fix transport_{g2h,h2g} TOCTOU

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in c5496ee685c48ed1cc183cd4263602579bb4a615 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:19 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch

Available – fixed in c5496ee685c48ed1cc183cd4263602579bb4a615, 401239811fa728fcdd53e360a91f157ffd23e1f4, 5752d8dbb3dfd7f1a9faf0f65377e60826ea9a17 +4

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ c0cfa2d8a788fcf45df5bf4070ab2474c88d543a, < c5496ee685c48ed1cc183cd4263602579bb4a615	Fixed in c5496ee685c48ed1cc183cd4263602579bb4a615
LinuxLinux	Affected ≥ c0cfa2d8a788fcf45df5bf4070ab2474c88d543a, < 401239811fa728fcdd53e360a91f157ffd23e1f4	Fixed in 401239811fa728fcdd53e360a91f157ffd23e1f4
LinuxLinux	Affected ≥ c0cfa2d8a788fcf45df5bf4070ab2474c88d543a, < 5752d8dbb3dfd7f1a9faf0f65377e60826ea9a17	Fixed in 5752d8dbb3dfd7f1a9faf0f65377e60826ea9a17
LinuxLinux	Affected ≥ c0cfa2d8a788fcf45df5bf4070ab2474c88d543a, < 3734d78210cceb2ee5615719a62a5c55ed381ff8	Fixed in 3734d78210cceb2ee5615719a62a5c55ed381ff8
LinuxLinux	Affected ≥ c0cfa2d8a788fcf45df5bf4070ab2474c88d543a, < 209fd720838aaf1420416494c5505096478156b4	Fixed in 209fd720838aaf1420416494c5505096478156b4
LinuxLinux	Affected ≥ c0cfa2d8a788fcf45df5bf4070ab2474c88d543a, < 80d7dc15805a93d520a249ac6d13d4f4df161c1b	Fixed in 80d7dc15805a93d520a249ac6d13d4f4df161c1b

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

References

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