Bug 2570826 (CVE-2026-126048) - CVE-2026-126048 gwenhywfar: Gwenhywfar: Denial of Service via stack-based buffer overflow during TLV parsing
Summary: CVE-2026-126048 gwenhywfar: Gwenhywfar: Denial of Service via stack-based buf...
Keywords:
Status: NEW
Alias: CVE-2026-126048
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-10 20:24 UTC by OSIDB Bzimport
Modified: 2026-11-11 00:01 UTC (History)
0 users

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Description OSIDB Bzimport 2026-11-10 20:24:57 UTC 
Gwenhywfar 4.99.8beta before 5.14.2 contains a stack-based buffer overflow in GWEN_TLV_Buffer_To_DB() in src/parser/tlv.c when decoding BER-TLV tags into a fixed 128-byte buffer. Attackers can supply a record with about 127 or more tag continuation bytes or a truncated multi-byte tag, such as via a malicious chip card's EF_SSD file read by libchipcard's ZKA driver, to crash the application.
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