CVE-2026-23138 (GCVE-0-2026-23138)
Vulnerability from cvelistv5
Published
2026-02-14 15:22
Modified
2026-03-25 10:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Add recursion protection in kernel stack trace recording A bug was reported about an infinite recursion caused by tracing the rcu events with the kernel stack trace trigger enabled. The stack trace code called back into RCU which then called the stack trace again. Expand the ftrace recursion protection to add a set of bits to protect events from recursion. Each bit represents the context that the event is in (normal, softirq, interrupt and NMI). Have the stack trace code use the interrupt context to protect against recursion. Note, the bug showed an issue in both the RCU code as well as the tracing stacktrace code. This only handles the tracing stack trace side of the bug. The RCU fix will be handled separately.
References
Impacted products
Vendor Product Version
Linux Linux Version: 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce
Version: 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce
Version: 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce
Version: 5f5fa7ea89dc82d34ed458f4d7a8634e8e9eefce
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/trace_recursion.h",
            "kernel/trace/trace.c"
          ],
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          "vendor": "Linux",
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Add recursion protection in kernel stack trace recording\n\nA bug was reported about an infinite recursion caused by tracing the rcu\nevents with the kernel stack trace trigger enabled. The stack trace code\ncalled back into RCU which then called the stack trace again.\n\nExpand the ftrace recursion protection to add a set of bits to protect\nevents from recursion. Each bit represents the context that the event is\nin (normal, softirq, interrupt and NMI).\n\nHave the stack trace code use the interrupt context to protect against\nrecursion.\n\nNote, the bug showed an issue in both the RCU code as well as the tracing\nstacktrace code. This only handles the tracing stack trace side of the\nbug. The RCU fix will be handled separately."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-25T10:20:23.720Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9b03768037d91ce727effb1c5d92d2c7781bf692"
        },
        {
          "url": "https://git.kernel.org/stable/c/19e18e6dabb1bbba76d2809ca7d8ae9e1f5975fe"
        },
        {
          "url": "https://git.kernel.org/stable/c/5b7f91acffd2c4c000971553d22efa1e1bb4feae"
        },
        {
          "url": "https://git.kernel.org/stable/c/5f1ef0dfcb5b7f4a91a9b0e0ba533efd9f7e2cdb"
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      ],
      "title": "tracing: Add recursion protection in kernel stack trace recording",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23138",
    "datePublished": "2026-02-14T15:22:23.385Z",
    "dateReserved": "2026-01-13T15:37:45.972Z",
    "dateUpdated": "2026-03-25T10:20:23.720Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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