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CVE-2025-38461 (GCVE-0-2025-38461)

Vulnerability from cvelistv5 – Published: 2025-07-25 15:27 – Updated: 2026-08-05 12:02
VLAI
Title
vsock: Fix transport_* TOCTOU
Summary
In the Linux kernel, the following vulnerability has been resolved: vsock: Fix transport_* TOCTOU Transport assignment may race with module unload. Protect new_transport from becoming a stale pointer. This also takes care of an insecure call in vsock_use_local_transport(); add a lockdep assert. BUG: unable to handle page fault for address: fffffbfff8056000 Oops: Oops: 0000 [#1] SMP KASAN RIP: 0010:vsock_assign_transport+0x366/0x600 Call Trace: vsock_connect+0x59c/0xc40 __sys_connect+0xe8/0x100 __x64_sys_connect+0x6e/0xc0 do_syscall_64+0x92/0x1c0 entry_SYSCALL_64_after_hwframe+0x4b/0x53
Severity
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 20:41 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 8667e8d0eb46bc54fdae30ba2f4786407d3d88eb (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 36a439049b34cca0b3661276049b84a1f76cc21a (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 9ce53e744f18e73059d3124070e960f3aa9902bf (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 9d24bb6780282b0255b9929abe5e8f98007e2c6e (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < ae2c712ba39c7007de63cb0c75b51ce1caaf1da5 (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 7b73bddf54777fb62d4d8c7729d0affe6df04477 (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 687aa0c5581b8d4aa87fd92973e4ee576b550cdf (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 5.10.240 , ≤ 5.10.* (semver)
Unaffected: 5.15.189 , ≤ 5.15.* (semver)
Unaffected: 6.1.146 , ≤ 6.1.* (semver)
Unaffected: 6.6.99 , ≤ 6.6.* (semver)
Unaffected: 6.12.39 , ≤ 6.12.* (semver)
Unaffected: 6.15.7 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: Fix transport_* TOCTOU\n\nTransport assignment may race with module unload. Protect new_transport\nfrom becoming a stale pointer.\n\nThis also takes care of an insecure call in vsock_use_local_transport();\nadd a lockdep assert.\n\nBUG: unable to handle page fault for address: fffffbfff8056000\nOops: Oops: 0000 [#1] SMP KASAN\nRIP: 0010:vsock_assign_transport+0x366/0x600\nCall Trace:\n vsock_connect+0x59c/0xc40\n __sys_connect+0xe8/0x100\n __x64_sys_connect+0x6e/0xc0\n do_syscall_64+0x92/0x1c0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: vsock: Se corrige la asignaci\u00f3n de transporte transport_* TOCTOU que podr\u00eda competir con la descarga del m\u00f3dulo. Se evita que new_transport se convierta en un puntero obsoleto. Esto tambi\u00e9n soluciona una llamada insegura en vsock_use_local_transport(); se a\u00f1ade una aserci\u00f3n lockdep. BUG: unable to handle page fault for address: fffffbfff8056000 Oops: Oops: 0000 [#1] SMP KASAN RIP: 0010:vsock_assign_transport+0x366/0x600 Call Trace: vsock_connect+0x59c/0xc40 __sys_connect+0xe8/0x100 __x64_sys_connect+0x6e/0xc0 do_syscall_64+0x92/0x1c0 entry_SYSCALL_64_after_hwframe+0x4b/0x53"
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            "tags": [
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      "current_release_date": "2026-07-30T09:04:09+00:00",
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      "product_status:known_affected": "22",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: vsock: Fix transport_* TOCTOU",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38461.json",
      "version": "3"
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.