CVE-2025-39963
linux: In the Linux kernel, the following vulnerability has been resolved: io_uring: fix incorrect io_kiocb reference in io...
CVE-2025-39963 is fixed in 72 products on 1 platform, first by DEBIAN-CVE-2025-39963, released October 9, 2025. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.8
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0016
4th percentile
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix incorrect io_kiocb reference in io_link_skb In io_link_skb function, there is a bug where prev_notif is incorrectly assigned using 'nd' instead of 'prev_nd'. This causes the context validation check to compare the current notification with itself instead of comparing it with the previous notification. Fix by using the correct prev_nd parameter when obtaining prev_notif.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bpftool6.12 · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| bpftool6.12-debuginfo · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| dtb-aarch64 · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-64kb · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-64kb · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-default · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-default · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-default-base · opensuse-leap 16.0 | 6.12.0-160000.6.1.160000.2.4 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-default-base · sles 16.0 | 6.12.0-160000.6.1.160000.2.4 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-docs · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-docs · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-kvmsmall · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-kvmsmall · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-livepatch-6.12.53-69.119 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel-livepatch-SLE16_Update_0 · sles 16.0 | 5-160000.4.3 | SUSE-SU-2026:20149-1 | Jan 26, 2026 |
| kernel-livepatch-SLE16_Update_1 · sles 16.0 | 3-160000.1.1 | SUSE-SU-2026:20202-1 | Jan 28, 2026 |
| kernel-obs-build · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-obs-qa · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-obs-qa · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-rt · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-source · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-source · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-syms · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-syms · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel-uek · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-core · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-core · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-core · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-core · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-devel · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-devel · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-core · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-core · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-deprecated · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-deprecated · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-desktop · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-desktop · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-extra · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-extra · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-extra-netfilter · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-extra-netfilter · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-usb · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-usb · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-wireless · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-debug-modules-wireless · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-devel · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-devel · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-doc · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-doc · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-core · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-core · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-deprecated · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-deprecated · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-desktop · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-desktop · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-extra · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-extra · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-extra-netfilter · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-extra-netfilter · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-usb · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-usb · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-wireless · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-modules-wireless · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-tools · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek-tools · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-core · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-core · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-devel · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-devel · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-core · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-core · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-deprecated · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-deprecated · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-desktop · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-desktop · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-extra · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-extra · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-extra-netfilter · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-extra-netfilter · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-usb · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-usb · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-wireless · ol 10 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-uek64k-modules-wireless · ol 9 | 0:6.12.0-104.43.4.3.el9uek | ELSA-2025-20719 | Oct 24, 2025 |
| kernel-zfcpdump · opensuse-leap 16.0 | 6.12.0-160000.7.1 | OPENSUSE-SU-2025:20091-1 | Nov 26, 2025 |
| kernel-zfcpdump · sles 16.0 | 6.12.0-160000.7.1 | SUSE-SU-2025:21147-1 | Nov 26, 2025 |
| kernel6.12 · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-debuginfo · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-debuginfo-common-aarch64 · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-debuginfo-common-x86_64 · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-devel · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-headers · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-libbpf · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-libbpf-debuginfo · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-libbpf-devel · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-libbpf-static · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-modules-extra · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-modules-extra-common · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-tools · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-tools-debuginfo · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| kernel6.12-tools-devel · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| linux · Debian 13.5 (trixie) | 6.12.57-1 | DEBIAN-CVE-2025-39963 | Oct 9, 2025 |
| linux · Debian 14 | 6.16.9-1 | DEBIAN-CVE-2025-39963 | Oct 9, 2025 |
| perf6.12 · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| perf6.12-debuginfo · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| python3-perf6.12 · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
| python3-perf6.12-debuginfo · amzn 2023 | 1:6.12.53-69.119.amzn2023 | ALAS2023-2025-1254 | Oct 27, 2025 |
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