ghsa-8r96-vh27-xgf4
Vulnerability from github
Published
2025-07-28 12:30
Modified
2025-07-28 12:30
Details

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").

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38471"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-28T12:15:28Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntls: always refresh the queue when reading sock\n\nAfter recent changes in net-next TCP compacts skbs much more\naggressively. 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\").",
  "id": "GHSA-8r96-vh27-xgf4",
  "modified": "2025-07-28T12:30:34Z",
  "published": "2025-07-28T12:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38471"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f3a429c21e0e43e8b8c55d30701e91411a4df02"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ab26bce3969f8fd925fe6f6f551e4d1a508c68b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/730fed2ff5e259495712518e18d9f521f61972bb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c76f6f437c46b2390888e0e1dc7aafafa9f4e0c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cdb767915fc9a15d88d19d52a1455f1dc3e5ddc8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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