Threats Tagged 'ghsa-g44m-wpf7-gr7x'
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Threats Tagged 'ghsa-g44m-wpf7-gr7x'
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fs_read_glyphs() in the libXfont2 font-server client (src/fc/fserve.c) indexes the per-character encoding[] array using num_chars from the FS_QueryXBitmaps16 reply, but that array was allocated with a size derived from num_extents in the separate FS_QueryXExtents16 reply. The two CARD32 fields are never cross-checked. A malicious or compromised font server can send a small num_extents (e.g. 1) in the extents reply, then a large num_chars (e.g. 100000) in the bitmaps reply. This causes attacker-controlled out-of-bounds heap read and writes. Join the discussion | CVE Database V5 | 09/10/2026, 08:15:24 UTC Added: 09/10/2026, 08:37:51 UTC |
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