{"id":"CVE-2026-107348","aliases":["AZL-108195","BIT-pgbouncer-2026-107348","DEBIAN-CVE-2026-107348","EUVD-2026-101498","GHSA-982p-g5h4-w372","RHSA-2026:83843","UBUNTU-CVE-2026-107348"],"status":"published","title":"Integer overflow causes an infinite loop in message buffer growth in PgBouncer","description":"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.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00392,"percentile":0.33721,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-190","CWE-835"],"published":"2026-10-14T17:34:29Z","modified":"2026-11-02T14:16:48Z","fixes":[{"ecosystem":"Azure Linux:3","package":"pgbouncer","fixed_in":["1.26.1-1"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"pgbouncer","fixed_in":["1.26.1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"pgbouncer","fixed_in":["1.26.1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure 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Hat:hummingbird:1","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.26.1-1.hum1"}]}],"bundled":3},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.5-1","1.6.1-1","1.7-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.2-3build1","1.7.2-65-g2b8e6cf-1","1.8.1-1","1.8.1-1build1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.0-1","1.10.0-1build1","1.11.0-1","1.12.0-2","1.12.0-3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.15.0-1","1.16.1-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.20.0-1","1.21.0-1","1.22.0-1","1.22.0-1build1","1.22.0-1build3","1.22.0-1build4"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.25.1-1","1.25.2-1","1.25.2-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.24.1-1","1.25.0-2","1.25.1-1"]}],"references":[{"url":"https://www.pgbouncer.org/changelog.html","tags":["web","article","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107348","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-982p-g5h4-w372"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-107348","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:83843","tags":["advisory"]},{"url":"https://images.redhat.com/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-107348","tags":["report"]},{"url":"https://access.redhat.com/security/updates/classification/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-107349","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-107350","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_83843.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2552741","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-107348","tags":["advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2552735","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-107349","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107349","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2552733","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-107350","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107350","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-107348","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-107348","title":"Integer overflow causes an infinite loop in message buffer growth in PgBouncer","description":"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.","status":"published","published":"2026-10-14T17:34:29.838Z","modified":"2026-10-16T20:11:22.132Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-190","CWE-835"],"updated_at":"2026-11-02T13:45:25.313702Z"}],"euvd":[{"id":"EUVD-2026-101498","description":"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.","status":"published","published":"2026-10-14T17:34:29Z","modified":"2026-10-16T20:11:22Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T17:00:01.858348Z"}],"ghsa":[{"id":"GHSA-982p-g5h4-w372","title":"Integer overflow in the message buffer growth logic (mbuf_make_room) in PgBouncer 1.21.0 through...","description":"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.","status":"published","published":"2026-10-14T18:32:28Z","modified":"2026-10-14T18:32:35Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T15:13:28.02433Z"}],"nvd":[{"id":"CVE-2026-107348","description":"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.","status":"published","published":"2026-10-14T18:17:25.43Z","modified":"2026-10-16T21:17:18.243Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-190","CWE-835"],"updated_at":"2026-11-02T14:12:59.328869Z"}],"osv":[{"id":"DEBIAN-CVE-2026-107348","description":"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.","status":"published","published":"2026-10-14T18:17:25.43Z","modified":"2026-10-23T17:47:32.299376264Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:49.381767Z"},{"id":"RHSA-2026:83843","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-10-18T10:05:15Z","modified":"2026-10-18T10:15:34.79421615Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.547034Z"},{"id":"UBUNTU-CVE-2026-107348","description":"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.","status":"published","published":"2026-10-14T18:17:00Z","modified":"2026-10-28T17:50:31Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:55:59.130573Z"},{"id":"AZL-108195","title":"CVE-2026-107348 affecting package pgbouncer for versions less than 1.26.1-1","description":"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.","status":"published","published":"2026-10-14T18:17:25Z","modified":"2026-11-02T14:16:48.968602992Z","updated_at":"2026-11-02T15:28:01.725816Z"},{"id":"BIT-pgbouncer-2026-107348","title":"Integer overflow causes an infinite loop in message buffer growth in PgBouncer","description":"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.","status":"published","published":"2026-10-21T08:55:08.744Z","modified":"2026-10-21T12:00:37.733771573Z","updated_at":"2026-11-02T15:28:34.343258Z"}]}}