CVE-2025-38471 (GCVE-0-2025-38471)

Vulnerability from cvelistv5 – Published: 2025-07-28 11:21 – Updated: 2026-08-05 12:02
VLAI
Title
tls: always refresh the queue when reading sock
Summary
In the Linux kernel, the following vulnerability has been resolved: tls: always refresh the queue when reading sock After recent changes in net-next TCP compacts skbs much more aggressively. This unearthed a bug in TLS where we may try to operate on an old skb when checking if all skbs in the queue have matching decrypt state and geometry. BUG: KASAN: slab-use-after-free in tls_strp_check_rcv+0x898/0x9a0 [tls] (net/tls/tls_strp.c:436 net/tls/tls_strp.c:530 net/tls/tls_strp.c:544) Read of size 4 at addr ffff888013085750 by task tls/13529 CPU: 2 UID: 0 PID: 13529 Comm: tls Not tainted 6.16.0-rc5-virtme Call Trace: kasan_report+0xca/0x100 tls_strp_check_rcv+0x898/0x9a0 [tls] tls_rx_rec_wait+0x2c9/0x8d0 [tls] tls_sw_recvmsg+0x40f/0x1aa0 [tls] inet_recvmsg+0x1c3/0x1f0 Always reload the queue, fast path is to have the record in the queue when we wake, anyway (IOW the path going down "if !strp->stm.full_len").
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0d87bbd39d7fd1135ab9eca672d760470f6508e8 , < 730fed2ff5e259495712518e18d9f521f61972bb (git)
Affected: 0d87bbd39d7fd1135ab9eca672d760470f6508e8 , < 1f3a429c21e0e43e8b8c55d30701e91411a4df02 (git)
Affected: 0d87bbd39d7fd1135ab9eca672d760470f6508e8 , < cdb767915fc9a15d88d19d52a1455f1dc3e5ddc8 (git)
Affected: 0d87bbd39d7fd1135ab9eca672d760470f6508e8 , < c76f6f437c46b2390888e0e1dc7aafafa9f4e0c6 (git)
Affected: 0d87bbd39d7fd1135ab9eca672d760470f6508e8 , < 4ab26bce3969f8fd925fe6f6f551e4d1a508c68b (git)
Affected: 2277d7cbdf47531b2c3cd01ba15255fa955aab35 (git)
Affected: 6.0.6 , < 6.1 (semver)
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Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 6.1.147 , ≤ 6.1.* (semver)
Unaffected: 6.6.100 , ≤ 6.6.* (semver)
Unaffected: 6.12.40 , ≤ 6.12.* (semver)
Unaffected: 6.15.8 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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This unearthed a bug in TLS where we may try\\nto operate on an old skb when checking if all skbs in the\\nqueue have matching decrypt state and geometry.\\n\\n    BUG: KASAN: slab-use-after-free in tls_strp_check_rcv+0x898/0x9a0 [tls]\\n    (net/tls/tls_strp.c:436 net/tls/tls_strp.c:530 net/tls/tls_strp.c:544)\\n    Read of size 4 at addr ffff888013085750 by task tls/13529\\n\\n    CPU: 2 UID: 0 PID: 13529 Comm: tls Not tainted 6.16.0-rc5-virtme\\n    Call Trace:\\n     kasan_report+0xca/0x100\\n     tls_strp_check_rcv+0x898/0x9a0 [tls]\\n     tls_rx_rec_wait+0x2c9/0x8d0 [tls]\\n     tls_sw_recvmsg+0x40f/0x1aa0 [tls]\\n     inet_recvmsg+0x1c3/0x1f0\\n\\nAlways reload the queue, fast path is to have the record in the queue\\nwhen we wake, anyway (IOW the path going down \\\"if !strp-\u003estm.full_len\\\").\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: TLS: siempre actualiza la cola al leer un archivo SOCK. Tras cambios recientes en Net-Next, TCP compacta los archivos SKB de forma mucho m\u00e1s agresiva. Esto revel\u00f3 un error en TLS que permite intentar operar en un archivo SKB antiguo al comprobar si todos los archivos SKB de la cola tienen el mismo estado de descifrado y geometr\u00eda. 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Party Advisory\"]},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-082556.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-07-30T08:47:14+00:00",
      "cve": "CVE-2025-38471",
      "id": "CVE-2025-38471",
      "initial_release_date": "2025-07-28T00:00:00+00:00",
      "product_status:fixed": "1169",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tls: always refresh the queue when reading sock",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38471.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-16T18:40:29Z",
      "cve": "CVE-2025-38471",
      "id": "CVE-2025-38471",
      "initial_release_date": "2025-07-28T23:22:55Z",
      "product_status:known_affected": "445",
      "product_status:known_not_affected": "281",
      "product_status:recommended": "502",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38471",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38471.json",
      "version": "45"
    }
  }
}



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Tags
Taxonomy of the tags.





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.