=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.4186 USN-8180-4: Linux kernel (Azure FIPS) vulnerabilities 24 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Linux kernel (Azure FIPS) Publisher: Ubuntu Operating System: Ubuntu Resolution: Patch/Upgrade CVE Names: CVE-2025-38232 CVE-2023-53520 CVE-2025-68365 CVE-2025-68725 CVE-2025-38408 CVE-2026-23125 CVE-2026-23128 CVE-2025-68817 CVE-2023-53662 CVE-2025-71162 CVE-2025-71163 CVE-2025-71185 CVE-2025-71186 CVE-2025-71190 CVE-2025-71191 CVE-2025-71194 CVE-2025-71196 CVE-2025-71197 CVE-2025-71199 CVE-2026-22997 CVE-2026-22999 CVE-2026-23001 CVE-2026-23003 CVE-2026-23011 CVE-2026-23026 CVE-2026-23033 CVE-2026-23037 CVE-2026-23038 CVE-2026-23049 CVE-2026-23056 CVE-2026-23058 CVE-2026-23061 CVE-2026-23063 CVE-2026-23064 CVE-2026-23071 CVE-2026-23073 CVE-2026-23075 CVE-2026-23076 CVE-2026-23078 CVE-2026-23080 CVE-2026-23083 CVE-2026-23084 CVE-2026-23085 CVE-2026-23087 CVE-2026-23089 CVE-2026-23090 CVE-2026-23091 CVE-2026-23093 CVE-2025-38057 CVE-2026-23095 CVE-2026-23096 CVE-2026-23097 CVE-2026-23098 CVE-2026-23099 CVE-2026-23101 CVE-2026-23103 CVE-2026-23105 CVE-2026-23108 CVE-2025-68211 CVE-2023-54207 CVE-2025-38125 CVE-2026-23209 CVE-2025-38591 CVE-2025-40149 CVE-2025-68340 CVE-2025-40164 CVE-2026-23164 CVE-2026-23124 CVE-2026-23120 CVE-2026-22998 CVE-2025-71188 CVE-2026-23119 CVE-2026-23121 CVE-2026-23133 CVE-2026-23145 CVE-2026-23146 CVE-2026-23150 CVE-2026-23167 CVE-2026-23170 CVE-2023-53421 Original Bulletin: https://ubuntu.com/security/notices/USN-8180-4 Comment: CVSS (Max): 7.8 CVE-2026-23209 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) CVSS Source: [Ubuntu], Red Hat, SUSE Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H EPSS (Max): 0.1% (27th) CVE-2025-38057 2026-04-23 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-8180-4: Linux kernel (Azure FIPS) vulnerabilities Publication date 23 April 2026 Overview Several security issues were fixed in the Linux kernel. Releases 22.04 LTS --------------------------------------------------------------------------------- Open side navigation Packages o linux-azure-fips - Linux kernel for Microsoft Azure Cloud systems with FIPS Details Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: o ARM64 architecture; o Block layer subsystem; o Drivers core; o Bluetooth drivers; o DMA engine subsystem; o GPU drivers; o HID subsystem; o Intel Trace Hub HW tracing drivers; o IIO ADC drivers; o IRQ chip drivers; o Modular ISDN driver; o LED subsystem; o UACCE accelerator framework; o Ethernet bonding driver; o Network drivers; o STMicroelectronics network drivers; o Ethernet team driver; o NVME drivers; o PHY drivers; o SLIMbus drivers; o W1 Dallas's 1-wire bus driver; o Xen hypervisor drivers; o BTRFS file system; o Ext4 file system; o Network file system (NFS) client; o Network file system (NFS) server daemon; o NTFS3 file system; o SMB network file system; o NFC subsystem; o BPF subsystem; o IRQ subsystem; o Memory management; o Bluetooth subsystem; o CAN network layer; o Networking core; o IPv4 networking; o IPv6 networking; o L2TP protocol; o NET/ROM layer; o Network traffic control; o SCTP protocol; o TLS protocol; o XFRM subsystem; o Creative Sound Blaster X-Fi driver; o USB sound devices --------------------------------------------------------------------------------- Update instructions ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. The problem can be corrected by updating your system to the following package versions: Ubuntu Package Version Release linux-image-5.15.0-1110-azure-fips - 5.15.0-1110.119+fips1 FIPS Updates FIPS-140 certified package with security fixes. Available with 22.04 Ubuntu Pro. LTS linux-image-azure-fips - 5.15.0.1110.95 FIPS Updates FIPS-140 jammy certified package with security fixes. Available with Ubuntu Pro. linux-image-azure-fips-5.15 - 5.15.0.1110.95 FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro. --------------------------------------------------------------------------------- References o CVE-2026-23209 o CVE-2026-23170 o CVE-2026-23167 o CVE-2026-23164 o CVE-2026-23150 o CVE-2026-23146 o CVE-2026-23145 o CVE-2026-23133 o CVE-2026-23128 o CVE-2026-23125 o CVE-2026-23124 o CVE-2026-23121 o CVE-2026-23120 o CVE-2026-23119 o CVE-2026-23108 o CVE-2026-23105 o CVE-2026-23103 o CVE-2026-23101 o CVE-2026-23099 o CVE-2026-23098 o CVE-2026-23097 o CVE-2026-23096 o CVE-2026-23095 o CVE-2026-23093 o CVE-2026-23091 o CVE-2026-23090 o CVE-2026-23089 o CVE-2026-23087 o CVE-2026-23085 o CVE-2026-23084 o CVE-2026-23083 o CVE-2026-23080 o CVE-2026-23078 o CVE-2026-23076 o CVE-2026-23075 o CVE-2026-23073 o CVE-2026-23071 o CVE-2026-23064 o CVE-2026-23063 o CVE-2026-23061 o CVE-2026-23058 o CVE-2026-23056 o CVE-2026-23049 o CVE-2026-23038 o CVE-2026-23037 o CVE-2026-23033 o CVE-2026-23026 o CVE-2026-23011 o CVE-2026-23003 o CVE-2026-23001 o CVE-2026-22999 o CVE-2026-22998 o CVE-2026-22997 o CVE-2025-71199 o CVE-2025-71197 o CVE-2025-71196 o CVE-2025-71194 o CVE-2025-71191 o CVE-2025-71190 o CVE-2025-71188 o CVE-2025-71186 o CVE-2025-71185 o CVE-2025-71163 o CVE-2025-71162 o CVE-2025-68817 o CVE-2025-68725 o CVE-2025-68365 o CVE-2025-68340 o CVE-2025-68211 o CVE-2025-40164 o CVE-2025-40149 o CVE-2025-38591 o CVE-2025-38408 o CVE-2025-38232 o CVE-2025-38125 o CVE-2025-38057 o CVE-2023-54207 o CVE-2023-53662 o CVE-2023-53520 o CVE-2023-53421 --------------------------------------------------------------------------------- Related notices o USN-8204-1 o USN-8203-1 o USN-8188-1 o USN-8187-1 o USN-8186-1 o USN-8185-1 o USN-8184-1 o USN-8183-1 o USN-8183-2 o USN-8180-1 o USN-8180-2 o USN-8180-3 o USN-8179-1 o USN-8179-2 o USN-8179-3 o USN-8177-1 o USN-8177-2 o USN-8165-1 o USN-8162-1 o USN-8152-1 o USN-8126-1 o USN-8125-1 o USN-8100-1 o USN-8095-1 o USN-8095-2 o USN-8095-3 o USN-8095-4 o USN-8095-5 o USN-8094-5 o USN-8094-1 o USN-8094-2 o USN-8094-3 o USN-8094-4 o USN-8074-1 o USN-8074-2 o USN-8052-1 o USN-8052-2 o USN-8048-1 o USN-8034-1 o USN-8034-2 o USN-8031-1 o USN-8031-2 o USN-8031-3 o USN-8030-1 o USN-8029-1 o USN-8029-2 o USN-8029-3 o USN-8028-1 o USN-8028-2 o USN-8028-3 o USN-8028-4 o USN-8028-5 o USN-8028-6 o USN-8028-7 o USN-8028-8 o USN-7856-1 o USN-7834-1 o USN-7833-1 o USN-7833-2 o USN-7833-3 o USN-7833-4 o USN-7789-1 o USN-7789-2 o USN-7771-1 o USN-7770-1 o USN-7769-1 o USN-7769-2 o USN-7769-3 --------------------------------------------------------------------------------- - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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| Vendor | Product | Versions |
|---|---|---|
| Ubuntu | Linux kernel (Azure FIPS) |