Bug 2494234 - CVE-2026-27145 node-exporter: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries [epel-all]
Summary: CVE-2026-27145 node-exporter: golang crypto/x509: Denial of Service via exces...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: node-exporter
Version: epel10
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Mikel Olasagasti Uranga
QA Contact:
URL:
Whiteboard: {"flaws": ["1765a0c8-adb1-4223-88bf-d...
Depends On:
Blocks: CVE-2026-27145
TreeView+ depends on / blocked
 
Reported: 2026-06-29 14:13 UTC by jkelly
Modified: 2026-07-18 00:42 UTC (History)
2 users (show)

Fixed In Version: node-exporter-1.12.0-1.el10_3 node-exporter-1.12.1-1.el10_2 node-exporter-1.12.1-1.el9
Clone Of:
Environment:
Last Closed: 2026-07-15 00:26:26 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description jkelly 2026-06-29 14:13:12 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

(*x509.Certificate).VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name (SAN) entries. This caused strings.Split(host, ".") to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically based on the number of SAN entries multiplied by the hostname's label count. Because x509.Verify validates hostnames before building the certificate chain, this overhead occurred even for untrusted certificates.

Comment 1 Fedora Update System 2026-07-11 12:20:47 UTC
FEDORA-EPEL-2026-958e73b074 (node-exporter-1.12.0-1.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-958e73b074

Comment 2 Fedora Update System 2026-07-11 12:20:48 UTC
FEDORA-EPEL-2026-3d2074184a (node-exporter-1.12.0-1.el10_2) has been submitted as an update to Fedora EPEL 10.2.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-3d2074184a

Comment 3 Fedora Update System 2026-07-12 01:18:31 UTC
FEDORA-EPEL-2026-befb40435d has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-befb40435d

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-07-12 01:23:48 UTC
FEDORA-EPEL-2026-3d2074184a has been pushed to the Fedora EPEL 10.2 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-3d2074184a

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-07-12 01:29:48 UTC
FEDORA-EPEL-2026-958e73b074 has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-958e73b074

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2026-07-15 00:26:26 UTC
FEDORA-EPEL-2026-befb40435d (node-exporter-1.12.0-1.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 7 Fedora Update System 2026-07-16 01:17:13 UTC
FEDORA-EPEL-2026-73c6251f78 has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-73c6251f78

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 8 Fedora Update System 2026-07-16 01:38:33 UTC
FEDORA-EPEL-2026-0f871c49cd has been pushed to the Fedora EPEL 10.2 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-0f871c49cd

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 9 Fedora Update System 2026-07-18 00:29:19 UTC
FEDORA-EPEL-2026-0f871c49cd (node-exporter-1.12.1-1.el10_2) has been pushed to the Fedora EPEL 10.2 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 10 Fedora Update System 2026-07-18 00:42:22 UTC
FEDORA-EPEL-2026-73c6251f78 (node-exporter-1.12.1-1.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.


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