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TI-2026-04758 Aliases CVE-2026-5435GHSA-32rw-r8mp-pw42

Potential buffer overflow in ns_sprintrrf TSIG handling path

Priority LOW 38CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Partial Red Hat: 18 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.2 and newer fail to enforce the caller-supplied buffer length, and can result in an out-of-bounds write when printing TSIG records.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00237 14th percentileScored 2026-11-07
Fix Partial Red Hat: 26 advisoriesRed Hat: 18 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GNUglibc2.2 and later—No fix listedCNA
  • glibc VendorGNU Affected 2.2 and later Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*2.2VulnerableGNU
  • cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:* Versions 2.2 Vulnerable ·GNU

Remediation

Red Hat 26 advisories

  • RHSA-2026:82888 Released 2026-10-14 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.17.2
    • Cert Manager support for Red Hat OpenShift release 1.17 registry.redhat.io/cert-manager/cert-manager-operator-bundle
  • RHSA-2026:82857 Released 2026-10-14 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.18.2
    • Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/cert-manager-operator-bundle
  • RHSA-2026:82372 Released 2026-10-13 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.18.2
    • Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/cert-manager-operator-rhel9
Show 23 more Red Hat advisories
  • RHSA-2026:82354 Released 2026-10-13 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.18.2
    • Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/cert-manager-istio-csr-rhel9
  • RHSA-2026:82347 Released 2026-10-13 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.18.2
    • Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/jetstack-cert-manager-acmesolver-rhel9, registry.redhat.io/cert-manager/jetstack-cert-manager-rhel9
  • RHSA-2026:82336 Released 2026-10-13 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.17.1
    • Cert Manager support for Red Hat OpenShift release 1.17 registry.redhat.io/cert-manager/cert-manager-istio-csr-rhel9
  • RHSA-2026:82322 Released 2026-10-13 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.17.2
    • Cert Manager support for Red Hat OpenShift release 1.17 registry.redhat.io/cert-manager/cert-manager-operator-rhel9
  • RHSA-2026:82304 Released 2026-10-13 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.17.2
    • Cert Manager support for Red Hat OpenShift release 1.17 registry.redhat.io/cert-manager/jetstack-cert-manager-acmesolver-rhel9, registry.redhat.io/cert-manager/jetstack-cert-manager-rhel9
  • RHSA-2026:81201 Released 2026-10-12 · Red Hat rating Important
    Cost Management Metrics Operator Update
    • Cost Management 4 registry.redhat.io/costmanagement/costmanagement-metrics-rhel9-operator
  • RHSA-2026:72502 Released 2026-09-28 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.20.1
    • Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/cert-manager-trust-manager-rhel9
  • RHSA-2026:72476 Released 2026-09-28 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.20.1
    • Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/cert-manager-operator-rhel9
  • RHSA-2026:72475 Released 2026-09-28 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.20.1
    • Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/cert-manager-istio-csr-rhel9
  • RHSA-2026:72470 Released 2026-09-28 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.20.1
    • Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/jetstack-cert-manager-acmesolver-rhel9, registry.redhat.io/cert-manager/jetstack-cert-manager-rhel9
  • RHSA-2026:72399 Released 2026-09-28 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.20.1
    • Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/cert-manager-operator-rhel9
  • RHSA-2026:72395 Released 2026-09-28 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.20.1
    • Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/cert-manager-istio-csr-rhel9
  • RHSA-2026:72394 Released 2026-09-28 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.20.1
    • Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/jetstack-cert-manager-rhel9
  • RHSA-2026:58981 Released 2026-08-24 · Red Hat rating Critical
    Red Hat Update Infrastructure 5.3 Technology Preview security update
    • Red Hat Update Infrastructure 5 registry.redhat.io/rhui5/cds-kubernetes-tp-rhel9, registry.redhat.io/rhui5/installer-tp-rhel9, registry.redhat.io/rhui5/rhua-tp-rhel9
  • RHSA-2026:53371 Released 2026-08-11 · Red Hat rating Important
    Insights proxy Container Image
    • Red Hat Insights proxy 1.5 registry.redhat.io/insights-proxy/insights-proxy-container-rhel9
  • RHSA-2026:50205 Released 2026-08-04 · Red Hat rating Important
    Red Hat build of OpenTelemetry 3.10.1 release
    • Red Hat OpenShift distributed tracing 3.10.1 registry.redhat.io/rhosdt/opentelemetry-collector-rhel9, registry.redhat.io/rhosdt/opentelemetry-rhel9-operator
  • RHSA-2026:46836 Released 2026-07-27 · Red Hat rating Important
    A Subscription Management tool for finding and reporting Red Hat product usage
    • Red Hat Discovery 2 registry.redhat.io/discovery/discovery-server-rhel9, registry.redhat.io/discovery/discovery-ui-rhel9
  • RHSA-2026:44624 Released 2026-07-23 · Red Hat rating Important
    Red Hat OpenShift distributed tracing platform (Tempo) 3.10.2 release
    • Red Hat OpenShift distributed tracing 3.10.1 registry.redhat.io/rhosdt/tempo-gateway-opa-rhel9, registry.redhat.io/rhosdt/tempo-gateway-rhel9, registry.redhat.io/rhosdt/tempo-jaeger-query-rhel9 +4
  • RHSA-2026:44481 Released 2026-07-23 · Red Hat rating Important
    Red Hat Update Infrastructure 5.2 security update
    • Red Hat Update Infrastructure 5 registry.redhat.io/rhui5/cds-kubernetes-rhel9, registry.redhat.io/rhui5/cds-rhel9, registry.redhat.io/rhui5/haproxy-rhel9 +2
  • RHSA-2026:42952 Released 2026-07-22 · Red Hat rating Moderate
    glibc security update
    • Red Hat Enterprise Linux AppStream (v. 9) glibc-devel-2.34-274.el9_8, glibc-doc-2.34-274.el9_8, glibc-headers-2.34-274.el9_8 +2
    • Red Hat Enterprise Linux BaseOS (v. 9) glibc-2.34-274.el9_8, glibc-all-langpacks-2.34-274.el9_8, glibc-common-2.34-274.el9_8 +47
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) glibc-benchtests-2.34-274.el9_8, glibc-nss-devel-2.34-274.el9_8, glibc-static-2.34-274.el9_8 +2
  • RHSA-2026:42733 Released 2026-07-21 · Red Hat rating Moderate
    glibc security update
    • Red Hat Enterprise Linux AppStream (v. 8) compat-libpthread-nonshared-2.28-251.el8_10.40, glibc-utils-2.28-251.el8_10.40
    • Red Hat Enterprise Linux BaseOS (v. 8) glibc-2.28-251.el8_10.40, glibc-all-langpacks-2.28-251.el8_10.40, glibc-common-2.28-251.el8_10.40 +47
    • Red Hat Enterprise Linux CRB (v. 8) glibc-benchtests-2.28-251.el8_10.40, glibc-nss-devel-2.28-251.el8_10.40, glibc-static-2.28-251.el8_10.40 +1
  • RHSA-2026:42694 Released 2026-07-21 · Red Hat rating Moderate
    glibc security update
    • Red Hat Enterprise Linux AppStream (v. 10) glibc-devel-2.39-128.el10_2, glibc-doc-2.39-128.el10_2, glibc-locale-source-2.39-128.el10_2 +1
    • Red Hat Enterprise Linux BaseOS (v. 10) glibc-2.39-128.el10_2, glibc-all-langpacks-2.39-128.el10_2, glibc-common-2.39-128.el10_2 +47
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) glibc-benchtests-2.39-128.el10_2, glibc-nss-devel-2.39-128.el10_2, glibc-static-2.39-128.el10_2 +2
  • RHSA-2026:12740 Released 2026-05-01 · Red Hat rating Moderate
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images glibc-2.42-12.hum1@aarch64, glibc-2.42-12.hum1@src, glibc-2.42-12.hum1@x86_64 +47

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Cert Manager support for Red Hat OpenShift release 1.17Fixed RHSA-2026:82304, RHSA-2026:82322, RHSA-2026:82336, RHSA-2026:82888
Cert Manager support for Red Hat OpenShift release 1.18Fixed RHSA-2026:82347, RHSA-2026:82354, RHSA-2026:82372, RHSA-2026:82857
Cert Manager support for Red Hat OpenShift release 1.20Fixed RHSA-2026:72394, RHSA-2026:72395, RHSA-2026:72399, RHSA-2026:72470, RHSA-2026:72475, RHSA-2026:72476, RHSA-2026:72502
Cost Management 4Fixed RHSA-2026:81201
Red Hat Discovery 2Fixed RHSA-2026:46836
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:42694
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:42733
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:42952
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:42694
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:42733
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:42952
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:42733
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:42694
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:42952
Red Hat Hardened ImagesFixed RHSA-2026:12740
Red Hat Insights proxy 1.5Fixed RHSA-2026:53371
Red Hat OpenShift distributed tracing 3.10.1Fixed RHSA-2026:44624, RHSA-2026:50205
Red Hat Update Infrastructure 5Fixed RHSA-2026:44481, RHSA-2026:58981
Not affected: 6 products
  • Cert Manager support for Red Hat OpenShift release 1.20
  • Cost Management 4
  • Red Hat Hardened Images
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat OpenShift distributed tracing 3.10.1
  • Red Hat Update Infrastructure 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5435
  2. 2026-10-03 Alias added: GHSA-32rw-r8mp-pw42
  3. 2026-10-13 Fix available: RHSA-2026:81201 · Red Hat
  4. 2026-10-13 Fix available: Cost Management 4 · Red Hat
  5. 2026-10-14 Fix available: RHSA-2026:82304 · Red Hat
  6. 2026-10-14 Fix available: RHSA-2026:82322 · Red Hat
  7. 2026-10-14 Fix available: RHSA-2026:82336 · Red Hat
  8. 2026-10-14 Fix available: RHSA-2026:82372 · Red Hat
  9. 2026-10-14 Fix available: RHSA-2026:82354 · Red Hat
  10. 2026-10-14 Fix available: RHSA-2026:82347 · Red Hat
  11. 2026-10-15 Fix available: RHSA-2026:82857 · Red Hat
  12. 2026-10-15 Fix available: RHSA-2026:82888 · Red Hat
  13. 2026-10-16 Fix available: Cert Manager support for Red Hat OpenShift release 1.17, Cert Manager support for Red Hat OpenShift release 1.18 · Red Hat
  14. 2026-11-01 Fix available: Red Hat OpenShift distributed tracing 3.10.1 · Red Hat
  15. 2026-11-06 Affected versions changed · Red Hat

References

Advisory 1

Other 1

  • TI-2023-04522 Glibc: buffer overflow in ld.so leading to privilege escalation KEVCVSS 3.1HIGH 7.8
  • TI-2015-00205 Heap-based buffer overflow in the __nss_hostname_digits_dots function in glibc 2.2, and… CVSS 2.0HIGH 10.0
  • TI-2026-04772 scanf %mc off-by-one heap buffer overflow CVSS 3.1CRITICAL 9.8
  • TI-2022-07360 The deprecated compatibility function clnt_create in the sunrpc module of the GNU C… CVSS 3.1CRITICAL 9.8
  • TI-2022-07359 The deprecated compatibility function svcunix_create in the sunrpc module of the GNU C… CVSS 3.1CRITICAL 9.8
  • TI-2015-06274 Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the… CVSS 3.0HIGH 8.1
See all 162 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences