Foxit Reader annotation use-after-free — CVE-2018-9958

CVE_2018_9958

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critical CVE exact CVE_2018_9958

What it means

PDF JavaScript matches the public Foxit Reader 9.0.1.1049 annotation-UAF exploitation chain.

Why it fires

CVE-2018-9958 is an annotation point-property use-after-free in Foxit Reader. The exact public exploit allocates and destroys Text annotations, reclaims the 0x60-byte allocation with ArrayBuffer, uses Int32Array to disclose stale pointers, and triggers re-entry through a JavaScript getter. Requiring this complete chain avoids pinning generic annotation automation to the CVE.

Other CVE heuristics

CVE_2026_34621_RELATED CVE_2023_26369 CVE_2026_34621 CVE_2010_1297_FLASH_RICHMEDIA CVE_2010_1297_SWF_TRIGGER CVE_2011_0611_SWF_TRIGGER CVE_2009_1862_FLASH_RICHMEDIA CVE_2010_2883 CVE_2018_4901 CVE_2009_3459 CVE_2018_4990_JPX_EMBEDDED_CMD CVE_2018_4990_JPX_CMAP_TRIGGER CVE_2010_1240 CVE_2010_0188 CVE_2014_0514 CVE_2013_3346 CVE_2013_0640 CVE_2010_3654_FLASH_RICHMEDIA CVE_2007_5020_MAILTO_MSHTA CVE_2014_0496 CVE_2008_2551 CVE_2021_40444 CVE_2006_4694 CVE_2008_0118