6.5
Medium
CVE-2026-112319 Krb5: mit krb5 kadmind authenticated memory exhaustion dos via unbounded rpc xdr allocation
Description
The GSS-RPC layer in MIT Kerberos 5 (aka krb5) does not enforce size limits on XDR-decoded data, which allows remote authenticated users to cause a denial of service (memory exhaustion or excessive CPU consumption in kadmind) via crafted RPC requests that trigger unbounded memory allocations during XDR decoding.
CVSS 3.1 detail
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitable remotely over the network, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- Interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 6 | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Red Hat Hardened Images | Versions not published |
Other CVEs of Red Hat Enterprise Linux 10
The 1475 CVEs of Red Hat Enterprise Linux 10 →
CVE-2026-122056
Openscap: one-byte heap buffer overflow in sds-compose may lead to denial-of-service
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CVE-2026-112314
Krb5: mit krb5 gss-rpc client memory leak on xid mismatch retries
7.5
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CVE-2026-112321
Krb5: mit krb5 kadmind unauthenticated memory leak dos via auth_gssapi_init error paths
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High
CVE-2026-112320
Krb5: mit krb5 kadmind unauthenticated memory leak dos via gss-rpc auth flavor switching
7.5
High