# ALAS2023-2025-876: Security update for 21 packages ALAS2023-2025-876, released February 26, 2025, fixes 37 CVEs across 21 products. None of them is reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/fix/linux/alas2023-2025-876 - Platform: Linux - Released: Feb 26, 2025 - Priority: High (Closes CVE-2025-21795, high severity) - CVEs: 37, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://alas.aws.amazon.com/AL2023/ALAS-2025-876.html ## Applies to | Product | Release | Fixed in | |---|---|---| | [bpftool](https://patchblox.com/security/data/product/linux/bpftool.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [bpftool-debuginfo](https://patchblox.com/security/data/product/linux/bpftool-debuginfo.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel-debuginfo](https://patchblox.com/security/data/product/linux/kernel-debuginfo.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel-debuginfo-common-aarch64](https://patchblox.com/security/data/product/linux/kernel-debuginfo-common-aarch64.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel-debuginfo-common-x86_64](https://patchblox.com/security/data/product/linux/kernel-debuginfo-common-x86-64.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel-devel](https://patchblox.com/security/data/product/linux/kernel-devel.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel-headers](https://patchblox.com/security/data/product/linux/kernel-headers.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel-libbpf](https://patchblox.com/security/data/product/linux/kernel-libbpf.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel-libbpf-devel](https://patchblox.com/security/data/product/linux/kernel-libbpf-devel.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel-libbpf-static](https://patchblox.com/security/data/product/linux/kernel-libbpf-static.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel-livepatch-6.1.129-138.220](https://patchblox.com/security/data/product/linux/kernel-livepatch-6.1.129-138.220.md) | amzn 2023 | 1.0-0.amzn2023 | | [kernel-modules-extra](https://patchblox.com/security/data/product/linux/kernel-modules-extra.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel-modules-extra-common](https://patchblox.com/security/data/product/linux/kernel-modules-extra-common.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel-tools](https://patchblox.com/security/data/product/linux/kernel-tools.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel-tools-debuginfo](https://patchblox.com/security/data/product/linux/kernel-tools-debuginfo.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [kernel-tools-devel](https://patchblox.com/security/data/product/linux/kernel-tools-devel.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [perf](https://patchblox.com/security/data/product/linux/perf.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [perf-debuginfo](https://patchblox.com/security/data/product/linux/perf-debuginfo.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [python3-perf](https://patchblox.com/security/data/product/linux/python3-perf.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | | [python3-perf-debuginfo](https://patchblox.com/security/data/product/linux/python3-perf-debuginfo.md) | amzn 2023 | 6.1.129-138.220.amzn2023 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2025-21795](https://patchblox.com/security/data/cve/CVE-2025-21795.md) | High | kernel: kernel: NFSD: fix hang in nfsd4_shutdown_callback | 7.8 | 0.0067 | | | [CVE-2025-21765](https://patchblox.com/security/data/cve/CVE-2025-21765.md) | High | kernel-64kb: ipv6: use RCU protection in ip6_default_advmss() (bsc#1237906). | 7.8 | 0.0061 | | | [CVE-2025-21704](https://patchblox.com/security/data/cve/CVE-2025-21704.md) | High | kernel-64kb: Security update for the Linux Kernel | 7.8 | 0.0037 | | | [CVE-2024-57986](https://patchblox.com/security/data/cve/CVE-2024-57986.md) | High | kernel-rt-64k-debug: kernel: HID: core: Fix assumption that Resolution Multipliers must be in Logical Collections | 7.8 | 0.0032 | | | [CVE-2025-21703](https://patchblox.com/security/data/cve/CVE-2025-21703.md) | High | kernel-64kb: netem: Update sch->q.qlen before qdisc_tree_reduce_backlog() (bsc#1237313). | 7.8 | 0.0030 | | | [CVE-2025-40364](https://patchblox.com/security/data/cve/CVE-2025-40364.md) | High | kernel-64kb: Security update for the Linux Kernel | 7.8 | 0.0028 | | | [CVE-2025-21785](https://patchblox.com/security/data/cve/CVE-2025-21785.md) | High | kernel-64kb: Security update for the Linux Kernel | 7.8 | 0.0027 | | | [CVE-2024-57996](https://patchblox.com/security/data/cve/CVE-2024-57996.md) | High | kernel-64kb: net_sched: sch_sfq: do not allow 1 packet limit (bsc#1239076). | 7.0 | 0.0027 | | | [CVE-2025-21787](https://patchblox.com/security/data/cve/CVE-2025-21787.md) | High | kernel-64kb: team: better TEAM_OPTION_TYPE_STRING validation (bsc#1238774). | 7.8 | 0.0027 | | | [CVE-2024-57981](https://patchblox.com/security/data/cve/CVE-2024-57981.md) | High | kernel-64k-modules-extra: kernel: usb: xhci: Fix NULL pointer dereference on certain command aborts | 7.8 | 0.0027 | | | [CVE-2025-21745](https://patchblox.com/security/data/cve/CVE-2025-21745.md) | High | kernel-64kb: Security update for the Linux Kernel | 7.8 | 0.0027 | | | [CVE-2024-58020](https://patchblox.com/security/data/cve/CVE-2024-58020.md) | High | kernel-rt-debug-core: kernel: HID: multitouch: Add NULL check in mt_input_configured | 7.8 | 0.0026 | | | [CVE-2024-53166](https://patchblox.com/security/data/cve/CVE-2024-53166.md) | High | kernel-64kb: Security update for the Linux Kernel | 7.8 | 0.0026 | | | [CVE-2025-21790](https://patchblox.com/security/data/cve/CVE-2025-21790.md) | High | kernel-modules-core: kernel: vxlan: check vxlan_vnigroup_init() return value | 7.8 | 0.0023 | | | [CVE-2025-21806](https://patchblox.com/security/data/cve/CVE-2025-21806.md) | High | kernel-64kb: net: let net.core.dev_weight always be non-zero (bsc#1238746). | 7.8 | 0.0023 | | | [CVE-2024-58083](https://patchblox.com/security/data/cve/CVE-2024-58083.md) | High | kernel-64kb: KVM: Explicitly verify target vCPU is online in kvm_get_vcpu() (bsc#1239036). | 7.8 | 0.0022 | | | [CVE-2025-21738](https://patchblox.com/security/data/cve/CVE-2025-21738.md) | High | ata: libata-sff: Ensure that we cannot write outside the allocated buffer | 7.8 | 0.0022 | | | [CVE-2025-21728](https://patchblox.com/security/data/cve/CVE-2025-21728.md) | High | kernel-64kb: bpf: Send signals asynchronously if !preemptible (bsc#1237879). | 7.8 | 0.0021 | | | [CVE-2024-57993](https://patchblox.com/security/data/cve/CVE-2024-57993.md) | High | kernel-64kb: Security update for the Linux Kernel | 7.8 | 0.0021 | | | [CVE-2025-21719](https://patchblox.com/security/data/cve/CVE-2025-21719.md) | High | kernel-64kb: ipmr: do not call mr_mfc_uses_dev() for unres entries (bsc#1238860). | 7.1 | 0.0021 | | | [CVE-2025-21826](https://patchblox.com/security/data/cve/CVE-2025-21826.md) | High | kernel-64k-debug: kernel: netfilter: nf_tables: reject mismatching sum of field_len with set key length | 7.8 | 0.0020 | | | [CVE-2025-21724](https://patchblox.com/security/data/cve/CVE-2025-21724.md) | High | kernel-64kb: iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index() (bsc#1238863). | 7.8 | 0.0019 | | | [CVE-2025-21766](https://patchblox.com/security/data/cve/CVE-2025-21766.md) | Routine | kernel-64kb: ipv4: use RCU protection in __ip_rt_update_pmtu() (bsc#1238754). | 5.5 | 0.0057 | | | [CVE-2025-21707](https://patchblox.com/security/data/cve/CVE-2025-21707.md) | Routine | kernel-64kb: mptcp: consolidate suboption status (bsc#1238862). | 5.5 | 0.0054 | | | [CVE-2025-21725](https://patchblox.com/security/data/cve/CVE-2025-21725.md) | Routine | kernel-64kb: smb: client: fix oops due to unset link speed (bsc#1238877). | 5.5 | 0.0040 | | | [CVE-2025-21776](https://patchblox.com/security/data/cve/CVE-2025-21776.md) | Routine | kernel-64kb: Security update for the Linux Kernel | 5.5 | 0.0028 | | | [CVE-2025-21814](https://patchblox.com/security/data/cve/CVE-2025-21814.md) | Routine | kernel-64kb: ptp: Ensure info->enable callback is always set (bsc#1238473). | 5.5 | 0.0026 | | | [CVE-2024-40945](https://patchblox.com/security/data/cve/CVE-2024-40945.md) | Routine | kernel-syms-azure: Security update for the Linux Kernel | 5.5 | 0.0026 | | | [CVE-2024-58017](https://patchblox.com/security/data/cve/CVE-2024-58017.md) | Routine | kernel-64kb: Security update for the Linux Kernel | 5.5 | 0.0025 | | | [CVE-2025-21779](https://patchblox.com/security/data/cve/CVE-2025-21779.md) | Routine | kernel-64kb: Security update for the Linux Kernel | 5.5 | 0.0025 | | | [CVE-2025-21705](https://patchblox.com/security/data/cve/CVE-2025-21705.md) | Routine | kernel-64kb: mptcp: handle fastopen disconnect correctly (bsc#1238525). | 5.5 | 0.0022 | | | [CVE-2025-21706](https://patchblox.com/security/data/cve/CVE-2025-21706.md) | Routine | kernel-64kb: mptcp: pm: only set fullmesh for subflow endp (bsc#1238528). | 5.5 | 0.0022 | | | [CVE-2024-58016](https://patchblox.com/security/data/cve/CVE-2024-58016.md) | Routine | kernel-uek: ELSA-2025-20480: Unbreakable Enterprise kernel security update (IMPORTANT) | 5.5 | 0.0021 | | | [CVE-2025-21716](https://patchblox.com/security/data/cve/CVE-2025-21716.md) | Routine | kernel-64kb: vxlan: Fix uninit-value in vxlan_vnifilter_dump() (bsc#1237891). | 5.5 | 0.0021 | | | [CVE-2025-21832](https://patchblox.com/security/data/cve/CVE-2025-21832.md) | Routine | kernel-64kb: Security update for the Linux Kernel | 5.5 | 0.0019 | | | [CVE-2025-21767](https://patchblox.com/security/data/cve/CVE-2025-21767.md) | Routine | kernel-64kb: clocksource: Use migrate_disable() to avoid calling get_random_u32() in atomic context (bsc#1238509). | 5.5 | 0.0018 | | | [CVE-2024-58071](https://patchblox.com/security/data/cve/CVE-2024-58071.md) | Routine | kernel-64kb: team: prevent adding a device which is already a team device lower (bsc#1238970). | 5.5 | 0.0018 | | --- Data as of 2026-11-11T07:45:43Z 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 Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.