CVE-2026-64299 (GCVE-0-2026-64299)
Vulnerability from cvelistv5
Published
2026-07-25 08:49
Modified
2026-08-17 04:52
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Prevent out-of-bounds read in glob matching String event fields are not necessarily NUL-terminated, so the filter predicate functions (filter_pred_string(), filter_pred_strloc() and filter_pred_strrelloc()) pass the field length to the regex match callbacks, and the length-aware matchers honour it. regex_match_glob() was the exception: it ignored the length and called glob_match(), which scans the string until it hits a NUL byte. Some string fields are not NUL-terminated. One example is the dynamic char array of the xfs_* namespace tracepoints, which is copied without a trailing NUL. For such a field, glob matching reads past the end of the event field, causing a KASAN slab-out-of-bounds read in glob_match(), reached via regex_match_glob() and filter_match_preds() from the xfs_lookup tracepoint. Add a length-bounded glob_match_len() and use it from regex_match_glob() so glob matching always stops at the field boundary. The matching loop is factored into a shared helper so glob_match() keeps its behaviour.
References
Impacted products
Vendor Product Version
Linux Linux Version: 60f1d5e3bac44b598f67d36062da96c095d2b700
Version: 60f1d5e3bac44b598f67d36062da96c095d2b700
Version: 60f1d5e3bac44b598f67d36062da96c095d2b700
Version: 60f1d5e3bac44b598f67d36062da96c095d2b700
Version: 60f1d5e3bac44b598f67d36062da96c095d2b700
Version: 60f1d5e3bac44b598f67d36062da96c095d2b700
Version: 60f1d5e3bac44b598f67d36062da96c095d2b700
Version: 60f1d5e3bac44b598f67d36062da96c095d2b700
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/glob.h",
            "kernel/trace/trace_events_filter.c",
            "lib/glob.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "265f3a690f6c7d69ef7d2ca50b04b4853a211df3",
              "status": "affected",
              "version": "60f1d5e3bac44b598f67d36062da96c095d2b700",
              "versionType": "git"
            },
            {
              "lessThan": "ee5b8888d3248618251fb69a2fad92afcb81557e",
              "status": "affected",
              "version": "60f1d5e3bac44b598f67d36062da96c095d2b700",
              "versionType": "git"
            },
            {
              "lessThan": "56d4c9ab84714eebb285a2fee68aaedf81e3ef15",
              "status": "affected",
              "version": "60f1d5e3bac44b598f67d36062da96c095d2b700",
              "versionType": "git"
            },
            {
              "lessThan": "35ae19764eabfe9c29029d3b5713c86e6855acdf",
              "status": "affected",
              "version": "60f1d5e3bac44b598f67d36062da96c095d2b700",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "60f1d5e3bac44b598f67d36062da96c095d2b700",
              "versionType": "git"
            },
            {
              "lessThan": "2dad64a97e1df47f5d9ccb17fa319aa348617226",
              "status": "affected",
              "version": "60f1d5e3bac44b598f67d36062da96c095d2b700",
              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "60f1d5e3bac44b598f67d36062da96c095d2b700",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/glob.h",
            "kernel/trace/trace_events_filter.c",
            "lib/glob.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.10"
            },
            {
              "lessThan": "4.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.96",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.39",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.4",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Prevent out-of-bounds read in glob matching\n\nString event fields are not necessarily NUL-terminated, so the filter\npredicate functions (filter_pred_string(), filter_pred_strloc() and\nfilter_pred_strrelloc()) pass the field length to the regex match\ncallbacks, and the length-aware matchers honour it.\n\nregex_match_glob() was the exception: it ignored the length and called\nglob_match(), which scans the string until it hits a NUL byte. Some\nstring fields are not NUL-terminated. One example is the dynamic char\narray of the xfs_* namespace tracepoints, which is copied without a\ntrailing NUL. For such a field, glob matching reads past the end of\nthe event field, causing a KASAN slab-out-of-bounds read in\nglob_match(), reached via regex_match_glob() and filter_match_preds()\nfrom the xfs_lookup tracepoint.\n\nAdd a length-bounded glob_match_len() and use it from regex_match_glob()\nso glob matching always stops at the field boundary. The matching loop\nis factored into a shared helper so glob_match() keeps its behaviour."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The attacker installs a glob filter through tracefs or perf_event_open and triggers it using a local pathname syscall on an affected filesystem such as XFS. Network clients cannot normally install or observe the required tracing filter.\nAC:L - No race or uncontrollable timing is required; the attacker selects a full-glob pattern and triggers a non-NUL-terminated event field repeatedly. Reused per-CPU trace buffers can also be groomed by attacker-controlled events.\nPR:L - Although user namespaces alone cannot bypass tracefs or initial-namespace perf capability checks, ordinary users can install filters when tracefs access is delegated to a tracing group or perf_event_paranoid permits kernel events. These are supported and reasonable deployments requiring only basic user privileges.\nUI:N - The attacker can install the filter and trigger pathname lookups directly without another user\u0027s action.\nS:U - The out-of-bounds read affects the host kernel within the same security authority and does not cross a guest-host, hypervisor, or IOMMU boundary.\nC:H - glob_match() ignores the supplied field length and scans until an incidental NUL, allowing filter results to act as an oracle over adjacent or reused kernel trace-buffer data. The read is not strictly bounded to a few bytes.\nI:N - The vulnerable code only reads memory and changes the Boolean filter result; it provides no out-of-bounds write or other memory-modification primitive.\nA:H - The repeatable unbounded scan can cross the event allocation or page boundary, producing the reported KASAN invalid access and potentially an oops or panic on inaccessible or poisoned memory. Panic-on-warning configurations make total availability loss directly achievable."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:52:57.094Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/265f3a690f6c7d69ef7d2ca50b04b4853a211df3"
        },
        {
          "url": "https://git.kernel.org/stable/c/ee5b8888d3248618251fb69a2fad92afcb81557e"
        },
        {
          "url": "https://git.kernel.org/stable/c/56d4c9ab84714eebb285a2fee68aaedf81e3ef15"
        },
        {
          "url": "https://git.kernel.org/stable/c/35ae19764eabfe9c29029d3b5713c86e6855acdf"
        },
        {
          "url": "https://git.kernel.org/stable/c/ebb55902856973906c8bb339a3a34824ed4a5086"
        },
        {
          "url": "https://git.kernel.org/stable/c/2dad64a97e1df47f5d9ccb17fa319aa348617226"
        },
        {
          "url": "https://git.kernel.org/stable/c/e5d5f3bd053a5f14787526c9f0f55ef900d43ac6"
        },
        {
          "url": "https://git.kernel.org/stable/c/0a6070839b1ef276d5b05bedfb787743e140fb17"
        }
      ],
      "title": "tracing: Prevent out-of-bounds read in glob matching",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64299",
    "datePublished": "2026-07-25T08:49:35.742Z",
    "dateReserved": "2026-07-19T15:36:31.778Z",
    "dateUpdated": "2026-08-17T04:52:57.094Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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