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GHSA-P8GW-HVF3-XMC4

Vulnerability from github – Published: 2026-02-14 15:32 – Updated: 2026-03-25 12:30

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.

Severity

4.7 (Medium)


                  
                    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23118"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-14T15:16:06Z",
    "severity": "MODERATE"
  },
  "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": "2026-03-25T12:30:19Z",
  "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/a426f29ac3fa3465093567ab763ada46762fb57c"
    },
    {
      "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": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-23118 (GCVE-0-2026-23118)

Vulnerability from cvelistv5 – Published: 2026-02-14 15:09 – Updated: 2026-05-11 22:00

Title

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

Summary

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.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/a426f29ac3fa34650…
https://git.kernel.org/stable/c/c08cf314191cd0f86…
https://git.kernel.org/stable/c/f8cf1368e0a5491b2…
https://git.kernel.org/stable/c/5d5fe8bcd331f1e34…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ace45bec6d77bc061c3c3d8ad99e298ea9800c2b , < a426f29ac3fa3465093567ab763ada46762fb57c (git) Affected: ace45bec6d77bc061c3c3d8ad99e298ea9800c2b , < c08cf314191cd0f8699089715efb9eff030f0086 (git) Affected: ace45bec6d77bc061c3c3d8ad99e298ea9800c2b , < f8cf1368e0a5491b27189a695c36f64e48f3d19d (git) Affected: ace45bec6d77bc061c3c3d8ad99e298ea9800c2b , < 5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b (git)
Linux	Linux	Affected: 4.17 Unaffected: 0 , < 4.17 (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.69 , ≤ 6.12.* (semver) Unaffected: 6.18.8 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/rxrpc/ar-internal.h",
            "net/rxrpc/conn_event.c",
            "net/rxrpc/output.c",
            "net/rxrpc/peer_event.c",
            "net/rxrpc/proc.c",
            "net/rxrpc/rxgk.c",
            "net/rxrpc/rxkad.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
            },
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/rxrpc/ar-internal.h",
            "net/rxrpc/conn_event.c",
            "net/rxrpc/output.c",
            "net/rxrpc/peer_event.c",
            "net/rxrpc/proc.c",
            "net/rxrpc/rxgk.c",
            "net/rxrpc/rxkad.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.69",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "value": "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."
        }
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      "providerMetadata": {
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    "datePublished": "2026-02-14T15:09:49.845Z",
    "dateReserved": "2026-01-13T15:37:45.969Z",
    "dateUpdated": "2026-05-11T22:00:28.575Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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