Red Hat Security Advisory: buildah security update

Fixed packages 5

Vulnerabilities 4

• High 7.5
  CVE-2026-56855

  Prevent DoS on deadlocked established channel in golang.org/x/crypto/ssh

  Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. Now, we handle all RFC 4254 channel messages; global requests are handled explicitly. Then, treat all other messages as a…

  golang.org/x/crypto golang.org/x/crypto/ssh zot kubescape Debian Ubuntu Azure Linux Wolfi Go
  Sep 2, 2026
• High 7.5
  CVE-2026-78667

  Lack of limit on size of parsed Range headers in net/http

  When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) can consume an excessive amount of CPU.

  Go standard library net/http golang go Debian Ubuntu Azure Linux Alpine Wolfi Go
  Oct 8, 2026
• Medium 6.8
  CVE-2026-111943 Public exploit

  Distrust compromised intermediate certificates in crypto/x509

  On most platforms, Go uses the given system root certificates. However, in some narrower cases, the system trust stores may not be updated without further action. To defend against the narrower set of cases that may remain affected, a denylist was added in cr…

  Go standard library crypto/x509 golang go Debian Ubuntu Azure Linux Alpine Wolfi Go crates.io
  Oct 21, 2026
• Medium 5.5
  CVE-2025-11395

  Podman: arbitrary file write when importing oci archive

  A flaw was found in Podman. If an attacker can pass a crafted tar archive to the `podman load` command, they can create files on the host machine with the privileges of the user running Podman.

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 10 Linux Debian Ubuntu Azure Linux Alpine
  Sep 15, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2528050
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2548334
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2556068
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_90424.json
• report
  https://access.redhat.com/security/cve/CVE-2025-11395
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2402034
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-11395
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-11395
• report
  https://access.redhat.com/security/cve/CVE-2026-56855
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-56855
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-56855
• article
  https://go.dev/cl/826524
• article
  https://go.dev/issue/81317
• article
  https://groups.google.com/g/golang-announce/c/1y3fb2np35U
• advisory
  https://pkg.go.dev/vuln/GO-2026-6355
• report
  https://access.redhat.com/security/cve/CVE-2026-78667
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-78667
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-78667
• article
  https://go.dev/cl/847309
• article
  https://go.dev/issue/81858
• article
  https://groups.google.com/g/golang-announce/c/U2fTuyDJznI
• advisory
  https://pkg.go.dev/vuln/GO-2026-6609
• report
  https://access.redhat.com/security/cve/CVE-2026-111943
• article
  https://access.redhat.com/security/vulnerabilities/RHSB-2026-012
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-111943
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-111943
• article
  https://github.com/golang/go/issues/82345
• article
  https://groups.google.com/g/golang-nuts/c/K22sG2AYnKU
• advisory
  https://pkg.go.dev/vuln/GO-2026-6809