CVE-2025-38112 (GCVE-0-2025-38112)

Vulnerability from cvelistv5 – Published: 2025-07-03 08:35 – Updated: 2026-11-05 20:52
VLAI
Title
net: Fix TOCTOU issue in sk_is_readable()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: Fix TOCTOU issue in sk_is_readable() sk->sk_prot->sock_is_readable is a valid function pointer when sk resides in a sockmap. After the last sk_psock_put() (which usually happens when socket is removed from sockmap), sk->sk_prot gets restored and sk->sk_prot->sock_is_readable becomes NULL. This makes sk_is_readable() racy, if the value of sk->sk_prot is reloaded after the initial check. Which in turn may lead to a null pointer dereference. Ensure the function pointer does not turn NULL after the check.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 20:49 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6653 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8934ce2fd08171e8605f7fada91ee7619fe17ab8 , < c2b26638476baee154920bb587fc94ff1bf04336 (git)
Affected: 8934ce2fd08171e8605f7fada91ee7619fe17ab8 , < 6fa68d7eab34d448a61aa24ea31e68b3231ed20d (git)
Affected: 8934ce2fd08171e8605f7fada91ee7619fe17ab8 , < 8926a7ef1977a832dd6bf702f1a99303dbf15b15 (git)
Affected: 8934ce2fd08171e8605f7fada91ee7619fe17ab8 , < ff55c85a923e043d59d26b20a673a1b4a219c310 (git)
Affected: 8934ce2fd08171e8605f7fada91ee7619fe17ab8 , < 1e0de7582ceccbdbb227d4e0ddf65732f92526da (git)
Affected: 8934ce2fd08171e8605f7fada91ee7619fe17ab8 , < 1b367ba2f94251822577daed031d6b9a9e11ba91 (git)
Affected: 8934ce2fd08171e8605f7fada91ee7619fe17ab8 , < 2660a544fdc0940bba15f70508a46cf9a6491230 (git)
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Linux Linux Affected: 4.17
Unaffected: 0 , < 4.17 (semver)
Unaffected: 5.10.239 , ≤ 5.10.* (semver)
Unaffected: 5.15.186 , ≤ 5.15.* (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.94 , ≤ 6.6.* (semver)
Unaffected: 6.12.34 , ≤ 6.12.* (semver)
Unaffected: 6.15.3 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
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            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
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            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          }
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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                "value": "CWE-367"
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      "current_release_date": "2026-11-05T14:40:40+00:00",
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      "product_status:known_affected": "200",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service due to TOCTOU in `sk_is_readable()`",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38112.json",
      "version": "3"
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                    "timestamp": "2026-11-05T20:49:48.418942Z",
                    "version": "2.0.3"
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              "shortName": "CISA-ADP"
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        "dateReserved": "2025-04-16T04:51:23.985Z",
        "dateUpdated": "2026-11-05T20:52:16.103Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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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.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
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Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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