Red Hat Security Advisory: runc security update

Fixed packages 3

Vulnerabilities 6

• Critical 9.1
  CVE-2025-68121

  Unexpected session resumption in crypto/tls

  During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user ca…

  Go standard library crypto/tls langfuse-3-worker katib-suggestion-hyperopt Debian Ubuntu Azure Linux Alpine Wolfi Go
  Feb 5, 2026
• High 7.5
  CVE-2025-61726

  Memory exhaustion in query parameter parsing in net/url

  The net/url package does not set a limit on the number of query parameters in a query. While the maximum size of query parameters in URLs is generally limited by the maximum request header size, the net/http.Request.ParseForm method can parse large URL-encode…

  Go standard library net/url katib-suggestion-hyperopt katib-earlystopping Debian Ubuntu Azure Linux Alpine Wolfi Go
  Jan 28, 2026
• High 7.5
  CVE-2025-61729

  Excessive resource consumption when printing error string for host certificate validation in crypto/x509

  Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certi…

  Go standard library crypto/x509 katib-suggestion-hyperopt katib-earlystopping Debian Ubuntu Azure Linux Alpine Wolfi Go
  Dec 2, 2025
• High 7.5
  CVE-2026-25679

  Incorrect parsing of IPv6 host literals in net/url

  url.Parse insufficiently validated the host/authority component and accepted some invalid URLs.

  Go standard library net/url langfuse-3-worker katib-suggestion-hyperopt Debian Ubuntu Azure Linux Alpine Wolfi Go
  Mar 6, 2026
• High 7.5
  CVE-2026-32280

  Unexpected work during chain building in crypto/x509

  During chain building, the amount of work that is done is not correctly limited when a large number of intermediate certificates are passed in VerifyOptions.Intermediates, which can lead to a denial of service. This affects both direct users of crypto/x509 an…

  Go standard library crypto/x509 golang go Debian Ubuntu Azure Linux Alpine Wolfi Go
  Apr 8, 2026
• Unscored —
  CVE-2026-23381

  net: bridge: fix nd_tbl NULL dereference when IPv6 is disabled

  In the Linux kernel, the following vulnerability has been resolved: net: bridge: fix nd_tbl NULL dereference when IPv6 is disabled When booting with the 'ipv6.disable=1' parameter, the nd_tbl is never initialized because inet6_init() exits before ndisc_init()…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Mar 25, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2418462
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2434432
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2437111
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2445356
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_25253.json
• report
  https://access.redhat.com/security/cve/CVE-2025-61726
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-61726
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-61726
• article
  https://go.dev/cl/736712
• article
  https://go.dev/issue/77101
• article
  https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc
• advisory
  https://pkg.go.dev/vuln/GO-2026-4341
• report
  https://access.redhat.com/security/cve/CVE-2025-61729
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-61729
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-61729
• article
  https://go.dev/cl/725920
• article
  https://go.dev/issue/76445
• article
  https://groups.google.com/g/golang-announce/c/8FJoBkPddm4
• advisory
  https://pkg.go.dev/vuln/GO-2025-4155
• report
  https://access.redhat.com/security/cve/CVE-2025-68121
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-68121
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-68121
• article
  https://go.dev/cl/737700
• article
  https://go.dev/issue/77217
• article
  https://groups.google.com/g/golang-announce/c/K09ubi9FQFk
• advisory
  https://pkg.go.dev/vuln/GO-2026-4337
• report
  https://access.redhat.com/security/cve/CVE-2026-23381
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2451220
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-23381
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-23381
• article
  https://lore.kernel.org/linux-cve-announce/2026032543-CVE-2026-23381-378d@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-25679
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-25679
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-25679
• article
  https://go.dev/cl/752180
• article
  https://go.dev/issue/77578
• article
  https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk
• advisory
  https://pkg.go.dev/vuln/GO-2026-4601