GHSA-FV73-WVQP-HJM7
Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-27 06:30In 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.
{
"affected": [],
"aliases": [
"CVE-2026-64299"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-25T10:17:10Z",
"severity": "HIGH"
},
"details": "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.",
"id": "GHSA-fv73-wvqp-hjm7",
"modified": "2026-07-27T06:30:31Z",
"published": "2026-07-25T12:31:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64299"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0a6070839b1ef276d5b05bedfb787743e140fb17"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/265f3a690f6c7d69ef7d2ca50b04b4853a211df3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2dad64a97e1df47f5d9ccb17fa319aa348617226"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/35ae19764eabfe9c29029d3b5713c86e6855acdf"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/56d4c9ab84714eebb285a2fee68aaedf81e3ef15"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e5d5f3bd053a5f14787526c9f0f55ef900d43ac6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ebb55902856973906c8bb339a3a34824ed4a5086"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ee5b8888d3248618251fb69a2fad92afcb81557e"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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