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

Vulnerability from cvelistv5 – Published: 2026-02-14 15:09 – Updated: 2026-02-14 15:09
VLAI?
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
References
Impacted products
Vendor Product Version
Linux Linux Affected: ace45bec6d77bc061c3c3d8ad99e298ea9800c2b , < c08cf314191cd0f8699089715efb9eff030f0086 (git)
Affected: ace45bec6d77bc061c3c3d8ad99e298ea9800c2b , < f8cf1368e0a5491b27189a695c36f64e48f3d19d (git)
Affected: ace45bec6d77bc061c3c3d8ad99e298ea9800c2b , < 5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b (git)
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    Linux Linux Affected: 4.17
Unaffected: 0 , < 4.17 (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": {
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      "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",
          "vendor": "Linux",
          "versions": [
            {
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              "versionType": "git"
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          "product": "Linux",
          "programFiles": [
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            "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": [
            {
              "status": "affected",
              "version": "4.17"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
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              "version": "6.12.69",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.18.*",
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              "version": "6.18.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
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                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
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                  "versionEndExcluding": "6.19",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-14T15:09:49.845Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c08cf314191cd0f8699089715efb9eff030f0086"
        },
        {
          "url": "https://git.kernel.org/stable/c/f8cf1368e0a5491b27189a695c36f64e48f3d19d"
        },
        {
          "url": "https://git.kernel.org/stable/c/5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b"
        }
      ],
      "title": "rxrpc: Fix data-race warning and potential load/store tearing",
      "x_generator": {
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      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23118",
    "datePublished": "2026-02-14T15:09:49.845Z",
    "dateReserved": "2026-01-13T15:37:45.969Z",
    "dateUpdated": "2026-02-14T15:09:49.845Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23118\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-14T15:16:06.933\",\"lastModified\":\"2026-02-14T15:16:06.933\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5d5fe8bcd331f1e34e0943ec7c18432edfcf0e8b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c08cf314191cd0f8699089715efb9eff030f0086\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f8cf1368e0a5491b27189a695c36f64e48f3d19d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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