Answer in brief
CVE-2026-72350 records a High severity (CVSS 7.8) vulnerability in netfilter: xt_u32: reject invalid shift counts. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1b50b8a371e90a5e110f466e4ac02cf6b5f681de <ca7c92d9701249e6daf132087756a88cbf2bb2a3 || >=1b50b8a371e90a5e110f466e4ac02cf6b5f681de <b33b44250d57ab0e5a1e2571b5285fb0d0a7f382 || >=1b50b8a371e90a5e110f466e4ac02cf6b5f681de <728f479dc0447ae7eaef87926ff49142e415a811 || >=1b50b8a371e90a5e110f466e4ac02cf6b5f681de <0a8b7a6d763775709c601f584e709ae48bcc000a || >=1b50b8a371e90a5e110f466e4ac02cf6b5f681de <cce42014415cecd98aa49b3950e7b02ee7c81268 || >=1b50b8a371e90a5e110f466e4ac02cf6b5f681de <a597a722fb71a534138c20359b655726622b5f17 || >=1b50b8a371e90a5e110f466e4ac02cf6b5f681de <00d034fe8230dfc5832fe011ff2d81c1a2cc7a29 || >=1b50b8a371e90a5e110f466e4ac02cf6b5f681de <64cdf7d30ac18e43df6c48004435febb965809a8 | ca7c92d9701249e6daf132087756a88cbf2bb2a3, b33b44250d57ab0e5a1e2571b5285fb0d0a7f382, 728f479dc0447ae7eaef87926ff49142e415a811, 0a8b7a6d763775709c601f584e709ae48bcc000a, cce42014415cecd98aa49b3950e7b02ee7c81268, a597a722fb71a534138c20359b655726622b5f17, 00d034fe8230dfc5832fe011ff2d81c1a2cc7a29, 64cdf7d30ac18e43df6c48004435febb965809a8 |
| Linux/Linuxgeneric | 2.6.23 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_u32: reject invalid shift counts u32_match_it() executes rule-supplied shift operands on a 32-bit value. A malformed u32 rule can provide a shift count of 32 or more, triggering an undefined shift out-of-bounds during packet evaluation. Validate XT_U32_LEFTSH and XT_U32_RIGHTSH operands in u32_mt_checkentry() and reject malformed rules before they reach the packet path.
Quoted source text, attributed separately from HOL analysis.