CVE-2026-107348 (GCVE-0-2026-107348)
Vulnerability from cvelistv5
Published
2026-10-14 17:34
Modified
2026-10-16 20:11
CWE
  • CWE-190 - Integer Overflow or Wraparound
  • CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Summary
Integer overflow in the message buffer growth logic (mbuf_make_room) in PgBouncer 1.21.0 through 1.26.0 allows a remote attacker to cause a denial of service when max_packet_size is configured above 2147483648. A packet header declaring a length above 2^31 makes the buffer size computation overflow, leaving the growth loop unable to terminate. Because PgBouncer serves all clients from a single process, this saturates a CPU core and stalls every pooled connection until the process is restarted. Since 1.23.0 the overflow is reachable before authentication with a five-byte packet header.
Impacted products
Vendor Product Version
n/a PgBouncer Version: 1.21.0   ≤
Show details on NVD website


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