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Fencer Intel
no cvss —

GHSA-q83h-524g-xf6h json

h2 unbounded empty DATA frames

published 2mo ago modified last mo. also RUSTSEC-2026-0258

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

The h2 crate, used internally by hyper, had a flaw that would accept and queue empty DATA frames without limit. If streams were not actively drained, this could lead to unbounded memory usage, or a panic if the length overflows.

Low severity.

Patched in v0.4.16.

Patch / fix

  • crates.io h2 0.4.16

Is GHSA-q83h-524g-xf6h in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Affected packages

ecosystem package affected fixed in
crates.io h2
>=0.0.0-0, <0.4.16
0.4.16

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.