CVE-2026-123975

Description

Grid Community Toolkit before 6.2.20261111 (globus-gss-assist before 12.9) contains a heap out-of-bounds write in globus_gss_assist_token_get_fd() triggered by SSLv2 record lengths below 3. Remote unauthenticated clients can send a crafted GSI handshake record to services like globus-gatekeeper and myproxy to corrupt heap memory and crash the service.

References

• https://github.com/gridcf/gct/blob/v6.2.20190829/gsi/gss_assist/source/tokens_f.c
• https://github.com/gridcf/gct/commit/3df2be4834c146bdcec90009a0f2e5771ff63cca
• https://github.com/gridcf/gct/releases/tag/v6.2.20261111
• https://gridcf.org/#2026-11-11
• https://www.vulncheck.com/advisories/grid-community-toolkit-globus-gss-assist-before-12.9-pre-authentication-heap-out-of-bounds-write