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Fix missing write lock validation in SplHeap::next()#21448

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ndossche wants to merge 2 commits intophp:PHP-8.4from
ndossche:spl-heap-wlock
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Fix missing write lock validation in SplHeap::next()#21448
ndossche wants to merge 2 commits intophp:PHP-8.4from
ndossche:spl-heap-wlock

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@ndossche ndossche commented Mar 14, 2026

Reported by @cnitlrt and @arnoldasr

@ndossche ndossche requested a review from Girgias as a code owner March 14, 2026 23:05
@ndossche ndossche linked an issue Mar 15, 2026 that may be closed by this pull request
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SplHeap::next() Write-Lock Bypass - Use-After-Free

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