{
  "cveId": "CVE-2026-64028",
  "url": "https://patchblox.com/security/cve/CVE-2026-64028",
  "summary": "CVE-2026-64028 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2026-64028, released July 20, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  tracing: Avoid NULL return from hist_field_name(...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  tracing: Avoid NULL return from hist_field_name() on truncation  hist_field_name() returns \u0022\u0022 everywhere except the fully-qualified VAR_REF/EXPR case, where snprintf() truncation returns NULL early and bypasses the bottom NULL-\u003E\u0022\u0022 guard. Callers don\u0027t expect NULL: strcat(expr, hist_field_name(field, 0)) at trace_events_hist.c:1758 and the strcmp() in the sort-key match loop at :4804 both deref it.  system and event_name are bounded by MAX_EVENT_NAME_LEN, but the field name on a VAR_REF is kstrdup\u0027d from a histogram variable name parsed out of the trigger string and has no length cap, so a long enough var name in a fully qualified reference can reach the truncation path.  Keep the length check but leave field_name as \u0022\u0022 on overflow.",
  "published": "2026-07-19T16:17:42Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.0013,
  "epssPercentile": 0.02675,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
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