CVE-2026-15722389-ds-base: 389-ds-base: pre-authentication stack buffer overflow in get_ruvelement_from_berval() via unbounded replica id parsing
Updated under an hour ago ()
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It affects Red Hat Directory Server 11.5 E4S for RHEL 8 and 10 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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A stack buffer overflow flaw was found in 389 Directory Server (389-ds-base). The get_ruvelement_from_berval() function in repl5_ruv.c copies digit characters from a network-supplied RUV berval into a fixed 16-byte stack buffer without bounds checking. A remote unauthenticated attacker can crash the LDAP server by sending a crafted StartNSDS50ReplicationRequest extended operation containing a replica ID field with more than 16 digit characters. The overflow occurs during payload decoding, before any authorization check. Stack protectors limit impact to denial of service.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-121
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Modified
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Directory Server 11.5 E4S for RHEL 8 redhat:directory_server_e4s | from 8060020260908152739.0ca98e7e not affected | CNA record |
Red Hat Red Hat Directory Server 11.9 for RHEL 8 redhat:directory_server | from 8100020260803140625.37ed7c03 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:3.2.0-9.el10_2 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus | from 0:3.0.6-20.el10_0 not affected | CNA record |
from 0:1.3.11.1-14.el7_9 not affected | CNA record | |
from 8040020260803141511.96015a92 not affected | CNA record | |
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support redhat:rhel_eus_long_life | from 8040020260803141511.96015a92 not affected | CNA record |
from 8080020260806114228.6dbb3803 not affected | CNA record | |
from 8080020260806114228.6dbb3803 not affected | CNA record | |
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus | from 0:2.6.1-23.el9_6 not affected | CNA record |
redhat directory_server redhat:directory_server | 11.0; 12.0 | NVD |
redhat 389_directory_server redhat:389_directory_server | all versions | NVD |
redhat enterprise_linux redhat:enterprise_linux | 7.0; 8.0; 9.0; 10.0 | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:55421vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:55422vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:55423vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:55424vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:55425vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:55426vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:55530vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:55532vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:55756vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:55757vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:55758vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:55794vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:56047vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:56048vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:56050vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:79217vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-15722vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2499961issue-tracking, x-refsource-redhat
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.