csaf_suse - suse-su-2025:4275-1

SUSE-SU-2025:4275-1

Vulnerability from csaf_suse - Published: 2025-11-27 10:04 - Updated: 2025-11-27 10:04

Summary

Security update for the Linux Kernel (Live Patch 15 for SUSE Linux Enterprise 15 SP6)

Notes

Title of the patch

Security update for the Linux Kernel (Live Patch 15 for SUSE Linux Enterprise 15 SP6)

Description of the patch

This update for the SUSE Linux Enterprise kernel 6.4.0-150600.23.70 fixes one security issue The following security issue was fixed: - CVE-2025-38616: tls: handle data disappearing from under the TLS ULP (bsc#1249537).

Patchnames

SUSE-2025-4275,SUSE-SLE-Module-Live-Patching-15-SP6-2025-4275

CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).

JSON

To clipboard

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  "vulnerabilities": [
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      "ids": [
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          "text": "https://www.suse.com/security/cve/CVE-2025-38616"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ntls: handle data disappearing from under the TLS ULP\n\nTLS expects that it owns the receive queue of the TCP socket.\nThis cannot be guaranteed in case the reader of the TCP socket\nentered before the TLS ULP was installed, or uses some non-standard\nread API (eg. zerocopy ones). Replace the WARN_ON() and a buggy\nearly exit (which leaves anchor pointing to a freed skb) with real\nerror handling. Wipe the parsing state and tell the reader to retry.\n\nWe already reload the anchor every time we (re)acquire the socket lock,\nso the only condition we need to avoid is an out of bounds read\n(not having enough bytes in the socket for previously parsed record len).\n\nIf some data was read from under TLS but there\u0027s enough in the queue\nwe\u0027ll reload and decrypt what is most likely not a valid TLS record.\nLeading to some undefined behavior from TLS perspective (corrupting\na stream? missing an alert? missing an attack?) but no kernel crash\nshould take place.",
          "title": "CVE description"
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        {
          "category": "external",
          "summary": "SUSE Bug 1249537 for CVE-2025-38616",
          "url": "https://bugzilla.suse.com/1249537"
        }
      ],
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          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H",
            "version": "3.1"
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          "category": "impact",
          "date": "2025-11-27T10:04:14Z",
          "details": "important"
        }
      ],
      "title": "CVE-2025-38616"
    }
  ]
}

CVE-2025-38616 (GCVE-0-2025-38616)

Vulnerability from cvelistv5 – Published: 2025-08-22 13:01 – Updated: 2025-09-29 05:54

Summary

In the Linux kernel, the following vulnerability has been resolved: tls: handle data disappearing from under the TLS ULP TLS expects that it owns the receive queue of the TCP socket. This cannot be guaranteed in case the reader of the TCP socket entered before the TLS ULP was installed, or uses some non-standard read API (eg. zerocopy ones). Replace the WARN_ON() and a buggy early exit (which leaves anchor pointing to a freed skb) with real error handling. Wipe the parsing state and tell the reader to retry. We already reload the anchor every time we (re)acquire the socket lock, so the only condition we need to avoid is an out of bounds read (not having enough bytes in the socket for previously parsed record len). If some data was read from under TLS but there's enough in the queue we'll reload and decrypt what is most likely not a valid TLS record. Leading to some undefined behavior from TLS perspective (corrupting a stream? missing an alert? missing an attack?) but no kernel crash should take place.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/f1fe99919f629f980…
	https://git.kernel.org/stable/c/eb0336f213fe88bbd…
	https://git.kernel.org/stable/c/db3658a12d5ec4db7…
	https://git.kernel.org/stable/c/2fb97ed9e2672b4f6…
	https://git.kernel.org/stable/c/6db015fc4b5d5f63a…

Impacted products

Vendor

Product

Version

Linux

Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < f1fe99919f629f980d0b8a7ff16950bffe06a859 (git)
Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < eb0336f213fe88bbdb7d2b19c9c9ec19245a3155 (git)
Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < db3658a12d5ec4db7185ae7476151a50521b7207 (git)
Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < 2fb97ed9e2672b4f6e24ce206ac1a875ce4bcb38 (git)
Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < 6db015fc4b5d5f63a64a193f65d98da3a7fc811d (git)

Linux

Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.6.103 , ≤ 6.6.* (semver)
Unaffected: 6.12.43 , ≤ 6.12.* (semver)
Unaffected: 6.15.11 , ≤ 6.15.* (semver)
Unaffected: 6.16.2 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "net/tls/tls.h",
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              "versionType": "semver"
            },
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
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        }
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        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/6db015fc4b5d5f63a64a193f65d98da3a7fc811d"
        }
      ],
      "title": "tls: handle data disappearing from under the TLS ULP",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38616",
    "datePublished": "2025-08-22T13:01:23.217Z",
    "dateReserved": "2025-04-16T04:51:24.029Z",
    "dateUpdated": "2025-09-29T05:54:51.143Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

SUSE-SU-2025:4275-1

CVE-2025-38616 (GCVE-0-2025-38616)

Tags

Sightings

Nomenclature