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Bug#1125189: harfbuzz: CVE-2026-22693

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On Sat, Jan 10, 2026 at 02:08:43PM +0100, Salvatore Bonaccorso wrote:
> Source: harfbuzz
> Version: 12.3.0-3
> 
> CVE-2026-22693[0]:
> | HarfBuzz is a text shaping engine. Prior to version 12.3.0, a null
> | pointer dereference vulnerability exists in the
> | SubtableUnicodesCache::create function located in src/hb-ot-cmap-
> | table.hh. The function fails to check if hb_malloc returns NULL
> | before using placement new to construct an object at the returned
> | pointer address. When hb_malloc fails to allocate memory (which can
> | occur in low-memory conditions or when using custom allocators that
> | simulate allocation failures), it returns NULL. The code then
> | attempts to call the constructor on this null pointer using
> | placement new syntax, resulting in undefined behavior and a
> | Segmentation Fault. This issue has been patched in version 12.3.0.
---end quoted text---

If the CVE has been fixed in 12.3.0, why is the bug filed against 
12.3.0-3 ?

-- 
‎أحمد المحمودي (Ahmed El-Mahmoudy)
 Digital design engineer
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 6E2E E4BB 72E2 F417 D066  6ABF 7B30 B496 A7EF 5761
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Bug#1125189: harfbuzz: CVE-2026-22693 Salvatore Bonaccorso <carnil@debian.org> - 2026-01-10 17:10 +0100
  Bug#1125189: harfbuzz: CVE-2026-22693 أحمد المحمودي <aelmahmoudy@users.sourceforge.net> - 2026-01-10 20:30 +0100
    Bug#1125189: harfbuzz: CVE-2026-22693 Salvatore Bonaccorso <carnil@debian.org> - 2026-01-10 20:50 +0100

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