# ALSA-2026:21556: Security update for 74 packages ALSA-2026:21556, released May 28, 2026, fixes 20 CVEs across 74 products. None of them is reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/fix/linux/alsa-2026-21556 - Platform: Linux - Released: May 28, 2026 - Priority: Urgent (Closes CVE-2025-68366, rated Critical) - CVEs: 20, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://osv.dev/vulnerability/ALSA-2026:21556 ## Applies to | Product | Release | Fixed in | |---|---|---| | [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k](https://patchblox.com/security/data/product/linux/kernel-64k.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k-core](https://patchblox.com/security/data/product/linux/kernel-64k-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k-debug](https://patchblox.com/security/data/product/linux/kernel-64k-debug.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k-debug-core](https://patchblox.com/security/data/product/linux/kernel-64k-debug-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k-debug-devel](https://patchblox.com/security/data/product/linux/kernel-64k-debug-devel.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k-debug-devel-matched](https://patchblox.com/security/data/product/linux/kernel-64k-debug-devel-matched.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k-debug-modules](https://patchblox.com/security/data/product/linux/kernel-64k-debug-modules.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k-debug-modules-core](https://patchblox.com/security/data/product/linux/kernel-64k-debug-modules-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-64k-debug-modules-extra.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k-devel](https://patchblox.com/security/data/product/linux/kernel-64k-devel.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k-devel-matched](https://patchblox.com/security/data/product/linux/kernel-64k-devel-matched.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k-modules](https://patchblox.com/security/data/product/linux/kernel-64k-modules.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k-modules-core](https://patchblox.com/security/data/product/linux/kernel-64k-modules-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-64k-modules-extra](https://patchblox.com/security/data/product/linux/kernel-64k-modules-extra.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-abi-stablelists](https://patchblox.com/security/data/product/linux/kernel-abi-stablelists.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-core](https://patchblox.com/security/data/product/linux/kernel-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-cross-headers](https://patchblox.com/security/data/product/linux/kernel-cross-headers.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-debug](https://patchblox.com/security/data/product/linux/kernel-debug.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-debug-core](https://patchblox.com/security/data/product/linux/kernel-debug-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-debug-devel](https://patchblox.com/security/data/product/linux/kernel-debug-devel.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-debug-devel-matched](https://patchblox.com/security/data/product/linux/kernel-debug-devel-matched.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-debug-modules](https://patchblox.com/security/data/product/linux/kernel-debug-modules.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-debug-modules-core](https://patchblox.com/security/data/product/linux/kernel-debug-modules-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-debug-modules-extra.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-debug-uki-virt](https://patchblox.com/security/data/product/linux/kernel-debug-uki-virt.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-devel](https://patchblox.com/security/data/product/linux/kernel-devel.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-devel-matched](https://patchblox.com/security/data/product/linux/kernel-devel-matched.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-doc](https://patchblox.com/security/data/product/linux/kernel-doc.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-headers](https://patchblox.com/security/data/product/linux/kernel-headers.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-modules](https://patchblox.com/security/data/product/linux/kernel-modules.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-modules-core](https://patchblox.com/security/data/product/linux/kernel-modules-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-modules-extra](https://patchblox.com/security/data/product/linux/kernel-modules-extra.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt](https://patchblox.com/security/data/product/linux/kernel-rt.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-64k](https://patchblox.com/security/data/product/linux/kernel-rt-64k.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-64k-core](https://patchblox.com/security/data/product/linux/kernel-rt-64k-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-64k-debug](https://patchblox.com/security/data/product/linux/kernel-rt-64k-debug.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-64k-debug-core](https://patchblox.com/security/data/product/linux/kernel-rt-64k-debug-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-64k-debug-devel](https://patchblox.com/security/data/product/linux/kernel-rt-64k-debug-devel.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-64k-debug-modules](https://patchblox.com/security/data/product/linux/kernel-rt-64k-debug-modules.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-64k-debug-modules-core](https://patchblox.com/security/data/product/linux/kernel-rt-64k-debug-modules-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-64k-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-64k-debug-modules-extra.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-64k-devel](https://patchblox.com/security/data/product/linux/kernel-rt-64k-devel.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-64k-modules](https://patchblox.com/security/data/product/linux/kernel-rt-64k-modules.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-64k-modules-core](https://patchblox.com/security/data/product/linux/kernel-rt-64k-modules-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-64k-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-64k-modules-extra.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-core](https://patchblox.com/security/data/product/linux/kernel-rt-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-debug](https://patchblox.com/security/data/product/linux/kernel-rt-debug.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-debug-core](https://patchblox.com/security/data/product/linux/kernel-rt-debug-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-debug-devel](https://patchblox.com/security/data/product/linux/kernel-rt-debug-devel.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-debug-modules](https://patchblox.com/security/data/product/linux/kernel-rt-debug-modules.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-debug-modules-core](https://patchblox.com/security/data/product/linux/kernel-rt-debug-modules-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-debug-modules-extra.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-devel](https://patchblox.com/security/data/product/linux/kernel-rt-devel.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-modules](https://patchblox.com/security/data/product/linux/kernel-rt-modules.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-modules-core](https://patchblox.com/security/data/product/linux/kernel-rt-modules-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-rt-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-modules-extra.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-tools](https://patchblox.com/security/data/product/linux/kernel-tools.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-tools-libs](https://patchblox.com/security/data/product/linux/kernel-tools-libs.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-tools-libs-devel](https://patchblox.com/security/data/product/linux/kernel-tools-libs-devel.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-uki-virt](https://patchblox.com/security/data/product/linux/kernel-uki-virt.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-uki-virt-addons](https://patchblox.com/security/data/product/linux/kernel-uki-virt-addons.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-zfcpdump](https://patchblox.com/security/data/product/linux/kernel-zfcpdump.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-zfcpdump-core](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-zfcpdump-devel](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-devel.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-zfcpdump-devel-matched](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-devel-matched.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-zfcpdump-modules](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-modules.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-zfcpdump-modules-core](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-modules-core.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [kernel-zfcpdump-modules-extra](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-modules-extra.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [libperf](https://patchblox.com/security/data/product/linux/libperf.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [perf](https://patchblox.com/security/data/product/linux/perf.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [python3-perf](https://patchblox.com/security/data/product/linux/python3-perf.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [rtla](https://patchblox.com/security/data/product/linux/rtla.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | | [rv](https://patchblox.com/security/data/product/linux/rv.md) | almalinux 9 | 5.14.0-687.12.1.el9_8 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2025-68366](https://patchblox.com/security/data/cve/CVE-2025-68366.md) | Urgent | linux: In the Linux kernel, the following vulnerability has been resolved: nbd: defer config unlock in nbd_genl_connect Th... | 8.8 | 0.0020 | | | [CVE-2026-23455](https://patchblox.com/security/data/cve/CVE-2026-23455.md) | High | kernel: In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_h323: check for zero leng... | 9.1 | 0.0159 | | | [CVE-2026-46195](https://patchblox.com/security/data/cve/CVE-2026-46195.md) | High | smb: client: validate dacloffset before building DACL pointers | 9.8 | 0.0068 | | | [CVE-2026-31685](https://patchblox.com/security/data/cve/CVE-2026-31685.md) | High | netfilter: ip6t_eui64: reject invalid MAC header for all packets | 9.4 | 0.0049 | | | [CVE-2026-43158](https://patchblox.com/security/data/cve/CVE-2026-43158.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved: xfs: fix freemap adjustments when adding xattrs... | 8.8 | 0.0047 | | | [CVE-2026-43190](https://patchblox.com/security/data/cve/CVE-2026-43190.md) | High | kernel: In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_tcpmss: check remaining length befo... | 8.2 | 0.0046 | | | [CVE-2026-31709](https://patchblox.com/security/data/cve/CVE-2026-31709.md) | High | smb: client: validate the whole DACL before rewriting it in cifsacl | 8.8 | 0.0035 | | | [CVE-2026-31408](https://patchblox.com/security/data/cve/CVE-2026-31408.md) | High | Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold | 8.8 | 0.0032 | | | [CVE-2026-43110](https://patchblox.com/security/data/cve/CVE-2026-43110.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: validate bsscfg indices in IF ev... | 8.8 | 0.0027 | | | [CVE-2026-43051](https://patchblox.com/security/data/cve/CVE-2026-43051.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved: HID: wacom: fix out-of-bounds read in wacom_intu... | 8.1 | 0.0026 | | | [CVE-2025-38653](https://patchblox.com/security/data/cve/CVE-2025-38653.md) | High | proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al | 7.8 | 0.0018 | | | [CVE-2026-43303](https://patchblox.com/security/data/cve/CVE-2026-43303.md) | High | mm/page_alloc: clear page->private in free_pages_prepare() | 7.8 | 0.0017 | | | [CVE-2026-23392](https://patchblox.com/security/data/cve/CVE-2026-23392.md) | High | netfilter: nf_tables: release flowtable after rcu grace period on error | 8.8 | 0.0017 | | | [CVE-2025-71089](https://patchblox.com/security/data/cve/CVE-2025-71089.md) | High | iommu: disable SVA when CONFIG_X86 is set | 7.8 | 0.0016 | | | [CVE-2025-68183](https://patchblox.com/security/data/cve/CVE-2025-68183.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved: ima: don't clear IMA_DIGSIG flag when setting or... | 7.8 | 0.0015 | | | [CVE-2025-68724](https://patchblox.com/security/data/cve/CVE-2025-68724.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved: crypto: asymmetric_keys - prevent overflow in as... | 8.1 | 0.0014 | | | [CVE-2026-43027](https://patchblox.com/security/data/cve/CVE-2026-43027.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_helper: pass helper to e... | 7.8 | 0.0013 | | | [CVE-2026-43020](https://patchblox.com/security/data/cve/CVE-2026-43020.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate LTK enc_size on load... | 7.8 | 0.0013 | | | [CVE-2026-31684](https://patchblox.com/security/data/cve/CVE-2026-31684.md) | High | net: sched: act_csum: validate nested VLAN headers | 7.8 | 0.0012 | | | [CVE-2026-43023](https://patchblox.com/security/data/cve/CVE-2026-43023.md) | High | kernel: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SCO: fix race conditions in sco_sock_c... | 7.8 | 0.0010 | | --- Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo