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RockyLinux 9 : krb5 (RLSA-2026:99715)

high Nessus Plugin ID 380296

Synopsis

The remote RockyLinux host is missing one or more security updates.

Description

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:99715 advisory.

 * krb5: MIT krb5 kadmind unauthenticated memory exhaustion via failed AUTH_GSSAPI_INIT requests (CVE-2026-112323)

 * krb5: MIT krb5 kadmind unauthenticated CPU DoS via AUTH_GSSAPI client states cleanup (CVE-2026-112322)

 * krb5: MIT krb5 GSS-RPC client memory leak on XID mismatch retries (CVE-2026-112314)

 * krb5: Unauthenticated KDC NULL pointer dereference KDC DoS via crafted PKINIT pre-auth request (CVE-2026-71200)

 * krb5: MIT krb5 kadmind unauthenticated memory leak DoS via AUTH_GSSAPI_INIT error paths (CVE-2026-112321)

 * krb5: MIT krb5 kadmind unauthenticated memory leak DoS via GSS-RPC auth flavor switching (CVE-2026-112320)

 * krb5: Unauthorized key reset of protected principal via kpasswd (CVE-2026-107884)

 * krb5: MIT krb5 kadmind authenticated memory exhaustion DoS via unbounded RPC XDR allocation (CVE-2026-112319)

 * krb5: MIT krb5 kadmind authenticated DoS exploiting dereference of null policy name pointers (CVE-2026-112318)

 * krb5: MIT krb5 KDC unauthenticated memory leak DoS in KDB keytab key decryption error path (CVE-2026-112317)

 * krb5: MIT krb5 KDC unauthenticated CPU DoS via quadratic ASN.1 SEQUENCE OF decoding (CVE-2026-119079)

 * krb5: MIT krb5 kadmind authenticated memory leak DoS in xdr_krb5_tl_data() decode failure (CVE-2026-112316)

 * krb5: Improper authorization via flawed PAC checksum verification (CVE-2026-111423)

 * krb5: MIT krb5 kadmind unauthenticated memory leak DoS in RPCSEC_GSS buffer decode failure (CVE-2026-112315)

 * krb5: krb5: Denial of Service via malformed PAC in S4U2Proxy requests (CVE-2026-107708)

 * krb5: krb5: Denial of Service via crafted forwarded credentials (CVE-2026-107778)

 * krb5: Alteration of authentication indicators in CAMMAC container (CVE-2026-71199)

 * krb5: kadmind: request alteration and protected information disclosure (CVE-2026-118380)

 * krb5: Unauthenticated KDC DoS based on ASN.1 decoder read overrun (CVE-2026-107364)

 Bug Fix(es) and Enhancement(s):

 * Set PKINIT CMS signatureAlgorithm based on certificate public key type [rhel-9.9.z] (JIRA:Rocky Linux-278059)

 * auth_gssapi_wrap_data xdr_bytes failure leak [rhel-9.9.z] (JIRA:Rocky Linux-296018)

 * xdr_bytes() does not free its allocation on partial decode failure [rhel-9.9.z] (JIRA:Rocky Linux-296030)

 * RPCSEC_GSS context lifecycle leaks [rhel-9.9.z] (JIRA:Rocky Linux-296039)

 * xdr_krb5_principal decode leak [rhel-9.9.z] (JIRA:Rocky Linux-296051)

 * process_chpw_request leak [rhel-9.9.z] (JIRA:Rocky Linux-296062)

 * Read overruns in GSSRPC svcauth_unix [rhel-9.9.z] (JIRA:Rocky Linux-296073)

 * Null dereference in KDC dispatch corner case [rhel-9.9.z] (JIRA:Rocky Linux-296085)

 * KDC DoS based on otherName value in PKINIT SAN code [rhel-9.9.z] (JIRA:Rocky Linux-296103)

 * Memory leak on krb5 gss_accept_sec_context() failure [rhel-9.9.z] (JIRA:Rocky Linux-296119)

 * KDC authdata filter does not catch KDC-issued types nested inside AD-IF-RELEVANT containers [rhel-9.9.z] (JIRA:Rocky Linux-296134)

 * Null dereference of principal names in krb5_rd_cred() [rhel-9.9.z] (JIRA:Rocky Linux-297007)

 * Dereference of empty first credential list element in GSS mechanism [rhel-9.9.z] (JIRA:Rocky Linux-297015)

 * Fix validation issues for trusted inputs [rhel-9.9.z] (JIRA:Rocky Linux-299746)

 * Skip expired keys when iterating over KEYRING ccache [rhel-9.9.z] (JIRA:Rocky Linux-299747)

 * Pass through null deleg_cred from SPNEGO to mech [rhel-9.9.z] (JIRA:Rocky Linux-299748)

 * Fix leaks on error in PKINIT signed-data creation [rhel-9.9.z] (JIRA:Rocky Linux-299749)

 * Fix hex key input handling in ktutil addent [rhel-9.9.z] (JIRA:Rocky Linux-299750)

 * Check reply length before V4 reply check [rhel-9.9.z] (JIRA:Rocky Linux-299751)

 * Fix memory leak in mpool_get() error paths [rhel-9.9.z] (JIRA:Rocky Linux-299752)

 * json: Correctly abort parse on invalid array [rhel-9.9.z] (JIRA:Rocky Linux-299753)

 * Prevent unsigned int overflow in iakerb_save_token() [rhel-9.9.z] (JIRA:Rocky Linux-299754)

 * Fix ksu memory leak in fcmd_resolve() [rhel-9.9.z] (JIRA:Rocky Linux-299755)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://bugzilla.redhat.com/show_bug.cgi?id=2478440

https://bugzilla.redhat.com/show_bug.cgi?id=2478445

https://bugzilla.redhat.com/show_bug.cgi?id=2478446

https://bugzilla.redhat.com/show_bug.cgi?id=2478447

https://bugzilla.redhat.com/show_bug.cgi?id=2478448

https://bugzilla.redhat.com/show_bug.cgi?id=2478449

https://bugzilla.redhat.com/show_bug.cgi?id=2478672

https://bugzilla.redhat.com/show_bug.cgi?id=2478684

https://bugzilla.redhat.com/show_bug.cgi?id=2478792

https://bugzilla.redhat.com/show_bug.cgi?id=2479209

https://bugzilla.redhat.com/show_bug.cgi?id=2479231

https://bugzilla.redhat.com/show_bug.cgi?id=2479331

https://bugzilla.redhat.com/show_bug.cgi?id=2479394

https://bugzilla.redhat.com/show_bug.cgi?id=2479403

https://bugzilla.redhat.com/show_bug.cgi?id=2548262

https://bugzilla.redhat.com/show_bug.cgi?id=2548269

https://bugzilla.redhat.com/show_bug.cgi?id=2563453

https://bugzilla.redhat.com/show_bug.cgi?id=2563461

https://bugzilla.redhat.com/show_bug.cgi?id=2569161

https://errata.rockylinux.org/RLSA-2026:99715

Plugin Details

Severity: High

ID: 380296

File Name: rocky_linux_RLSA-2026-99715.nasl

Version: 1.1

Type: Local

Published: 11/13/2026

Updated: 11/13/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.5

Percentile: 57.81

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N

CVSS Score Source: CVE-2026-71199

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2026-119079

CVSS v4

Risk Factor: High

Base Score: 7.1

Threat Score: 4.9

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-107778

Vulnerability Information

CPE: cpe:/o:rocky:linux:9, p-cpe:/a:rocky:linux:krb5-debuginfo, p-cpe:/a:rocky:linux:krb5-debugsource, p-cpe:/a:rocky:linux:krb5-devel, p-cpe:/a:rocky:linux:krb5-libs-debuginfo, p-cpe:/a:rocky:linux:krb5-libs, p-cpe:/a:rocky:linux:krb5-pkinit-debuginfo, p-cpe:/a:rocky:linux:krb5-pkinit, p-cpe:/a:rocky:linux:krb5-server-debuginfo, p-cpe:/a:rocky:linux:krb5-server-ldap-debuginfo, p-cpe:/a:rocky:linux:krb5-server-ldap, p-cpe:/a:rocky:linux:krb5-server, p-cpe:/a:rocky:linux:krb5-workstation-debuginfo, p-cpe:/a:rocky:linux:krb5-workstation, p-cpe:/a:rocky:linux:krb5-xrealmauthz-debuginfo, p-cpe:/a:rocky:linux:krb5-xrealmauthz, p-cpe:/a:rocky:linux:libkadm5-debuginfo, p-cpe:/a:rocky:linux:libkadm5

Required KB Items: Host/local_checks_enabled, Host/RockyLinux/release, Host/RockyLinux/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 11/13/2026

Vulnerability Publication Date: 10/8/2026

Reference Information

CVE: CVE-2026-107364, CVE-2026-107708, CVE-2026-107778, CVE-2026-107884, CVE-2026-111423, CVE-2026-112314, CVE-2026-112315, CVE-2026-112316, CVE-2026-112317, CVE-2026-112318, CVE-2026-112319, CVE-2026-112320, CVE-2026-112321, CVE-2026-112322, CVE-2026-112323, CVE-2026-118380, CVE-2026-119079, CVE-2026-71199, CVE-2026-71200