CVE-2026-64028

CVE CVE-2026-64028EUVD EUVD-2026-45601Published 2026-07-19T15:39:19.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: tracing: Avoid NULL return from hist_field_name() on truncation hist_field_name() returns "" everywhere except the fully-qualified VAR_REF/EXPR case, where snprintf() truncation returns NULL early and bypasses the bottom NULL->"" guard. Callers don't 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'd 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 "" on overflow.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux 7.0.10 <7.0.11; 0402c60abe769098d77f3b3bd1e29a97922b614b <d6c8b3ebdcdb12b59ad4212acb137cc56cae453d; 5ec1d1e97de134beed3a5b08235a60fc1c51af96 <576ec047d20b368b43c4d5db98c4f2e0f3c101ec; 6.18.33 <6.18.34; 6929e650db8451a9975ac0a631ba2d6e5d1e80ba <915c1254fe0788abddc31095b360e9dc98907a34; 9399a92989354e34086f9a5c379493217df83c5e <e91687643c440ca3997d67646e6f80b92edc6703; 6.6.141 <6.6.142; dfd1cd57ee6067301841b7b0967c70f910a51150 <37377b39ff86dacbc533275c1155210d4fd5dc91; 3cb6cb9c5a547a1979ad74f38eefe8e3687d96e0 <be4e99038c1603fa6b329d8ee3e364825e17c353; e5c223f46c2e0691461dd97510c15e1f77148872 <0402a1d3ddec565132867337ed44514a09d84728; 2e8578364061c4e88ae33bc20c2d6f64f365f6a2 <e3f5d42cdc2f167719564693675f1eead81378ea; 6.12.91 <6.12.92

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

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