GHSA-P8GW-HVF3-XMC4

Vulnerability from github – Published: 2026-02-14 15:32 – Updated: 2026-02-14 15:32
VLAI?
Details

In the Linux kernel, the following vulnerability has been resolved:

rxrpc: Fix data-race warning and potential load/store tearing

Fix the following:

    BUG: KCSAN: data-race in rxrpc_peer_keepalive_worker / rxrpc_send_data_packet

which is reporting an issue with the reads and writes to ->last_tx_at in:

    conn->peer->last_tx_at = ktime_get_seconds();

and:

    keepalive_at = peer->last_tx_at + RXRPC_KEEPALIVE_TIME;

The lockless accesses to these to values aren't actually a problem as the read only needs an approximate time of last transmission for the purposes of deciding whether or not the transmission of a keepalive packet is warranted yet.

Also, as ->last_tx_at is a 64-bit value, tearing can occur on a 32-bit arch.

Fix both of these by switching to an unsigned int for ->last_tx_at and only storing the LSW of the time64_t. It can then be reconstructed at need provided no more than 68 years has elapsed since the last transmission.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23118"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-14T15:16:06Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix data-race warning and potential load/store tearing\n\nFix the following:\n\n        BUG: KCSAN: data-race in rxrpc_peer_keepalive_worker / rxrpc_send_data_packet\n\nwhich is reporting an issue with the reads and writes to -\u003elast_tx_at in:\n\n        conn-\u003epeer-\u003elast_tx_at = ktime_get_seconds();\n\nand:\n\n        keepalive_at = peer-\u003elast_tx_at + RXRPC_KEEPALIVE_TIME;\n\nThe lockless accesses to these to values aren\u0027t actually a problem as the\nread only needs an approximate time of last transmission for the purposes\nof deciding whether or not the transmission of a keepalive packet is\nwarranted yet.\n\nAlso, as -\u003elast_tx_at is a 64-bit value, tearing can occur on a 32-bit\narch.\n\nFix both of these by switching to an unsigned int for -\u003elast_tx_at and only\nstoring the LSW of the time64_t.  It can then be reconstructed at need\nprovided no more than 68 years has elapsed since the last transmission.",
  "id": "GHSA-p8gw-hvf3-xmc4",
  "modified": "2026-02-14T15:32:18Z",
  "published": "2026-02-14T15:32:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23118"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c08cf314191cd0f8699089715efb9eff030f0086"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8cf1368e0a5491b27189a695c36f64e48f3d19d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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