High severity7.8NVD Advisory· Published Apr 24, 2026· Updated Sep 18, 2026
CVE-2026-31663
CVE-2026-31663
Description
In the Linux kernel, the following vulnerability has been resolved:
xfrm: hold dev ref until after transport_finish NF_HOOK
After async crypto completes, xfrm_input_resume() calls dev_put() immediately on re-entry before the skb reaches transport_finish. The skb->dev pointer is then used inside NF_HOOK and its okfn, which can race with device teardown.
Remove the dev_put from the async resumption entry and instead drop the reference after the NF_HOOK call in transport_finish, using a saved device pointer since NF_HOOK may consume the skb. This covers NF_DROP, NF_QUEUE and NF_STOLEN paths that skip the okfn.
For non-transport exits (decaps, gro, drop) and secondary async return points, release the reference inline when async is set.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
100cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 9 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=3.2.100,<3.3
- cpe:2.3:o:linux:linux_kernel:4.15:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
- (no CPE)
- osv-coords90 versionspkg:linux/kernelpkg:rpm/almalinux/bpftoolpkg:rpm/almalinux/kernelpkg:rpm/almalinux/kernel-64kpkg:rpm/almalinux/kernel-64k-corepkg:rpm/almalinux/kernel-64k-debugpkg:rpm/almalinux/kernel-64k-debug-corepkg:rpm/almalinux/kernel-64k-debug-develpkg:rpm/almalinux/kernel-64k-debug-devel-matchedpkg:rpm/almalinux/kernel-64k-debug-modulespkg:rpm/almalinux/kernel-64k-debug-modules-corepkg:rpm/almalinux/kernel-64k-debug-modules-extrapkg:rpm/almalinux/kernel-64k-develpkg:rpm/almalinux/kernel-64k-devel-matchedpkg:rpm/almalinux/kernel-64k-modulespkg:rpm/almalinux/kernel-64k-modules-corepkg:rpm/almalinux/kernel-64k-modules-extrapkg:rpm/almalinux/kernel-abi-stablelistspkg:rpm/almalinux/kernel-corepkg:rpm/almalinux/kernel-cross-headerspkg:rpm/almalinux/kernel-debugpkg:rpm/almalinux/kernel-debug-corepkg:rpm/almalinux/kernel-debug-develpkg:rpm/almalinux/kernel-debug-devel-matchedpkg:rpm/almalinux/kernel-debug-modulespkg:rpm/almalinux/kernel-debug-modules-corepkg:rpm/almalinux/kernel-debug-modules-extrapkg:rpm/almalinux/kernel-debug-uki-virtpkg:rpm/almalinux/kernel-develpkg:rpm/almalinux/kernel-devel-matchedpkg:rpm/almalinux/kernel-docpkg:rpm/almalinux/kernel-headerspkg:rpm/almalinux/kernel-modulespkg:rpm/almalinux/kernel-modules-corepkg:rpm/almalinux/kernel-modules-extrapkg:rpm/almalinux/kernel-modules-extra-matchedpkg:rpm/almalinux/kernel-rtpkg:rpm/almalinux/kernel-rt-64kpkg:rpm/almalinux/kernel-rt-64k-corepkg:rpm/almalinux/kernel-rt-64k-debugpkg:rpm/almalinux/kernel-rt-64k-debug-corepkg:rpm/almalinux/kernel-rt-64k-debug-develpkg:rpm/almalinux/kernel-rt-64k-debug-modulespkg:rpm/almalinux/kernel-rt-64k-debug-modules-corepkg:rpm/almalinux/kernel-rt-64k-debug-modules-extrapkg:rpm/almalinux/kernel-rt-64k-develpkg:rpm/almalinux/kernel-rt-64k-modulespkg:rpm/almalinux/kernel-rt-64k-modules-corepkg:rpm/almalinux/kernel-rt-64k-modules-extrapkg:rpm/almalinux/kernel-rt-corepkg:rpm/almalinux/kernel-rt-debugpkg:rpm/almalinux/kernel-rt-debug-corepkg:rpm/almalinux/kernel-rt-debug-develpkg:rpm/almalinux/kernel-rt-debug-modulespkg:rpm/almalinux/kernel-rt-debug-modules-corepkg:rpm/almalinux/kernel-rt-debug-modules-extrapkg:rpm/almalinux/kernel-rt-develpkg:rpm/almalinux/kernel-rt-modulespkg:rpm/almalinux/kernel-rt-modules-corepkg:rpm/almalinux/kernel-rt-modules-extrapkg:rpm/almalinux/kernel-toolspkg:rpm/almalinux/kernel-tools-libspkg:rpm/almalinux/kernel-tools-libs-develpkg:rpm/almalinux/kernel-uki-virtpkg:rpm/almalinux/kernel-uki-virt-addonspkg:rpm/almalinux/kernel-zfcpdumppkg:rpm/almalinux/kernel-zfcpdump-corepkg:rpm/almalinux/kernel-zfcpdump-develpkg:rpm/almalinux/kernel-zfcpdump-devel-matchedpkg:rpm/almalinux/kernel-zfcpdump-modulespkg:rpm/almalinux/kernel-zfcpdump-modules-corepkg:rpm/almalinux/kernel-zfcpdump-modules-extrapkg:rpm/almalinux/libperfpkg:rpm/almalinux/perfpkg:rpm/almalinux/python3-perfpkg:rpm/almalinux/rtlapkg:rpm/almalinux/rvpkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0
>= 4.15.0, < 6.12.94+ 89 more
- (no CPE)range: >= 4.15.0, < 6.12.94
- (no CPE)range: < 4.18.0-553.164.1.el8_10
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-211.55.1.el10_2
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1.160000.2.17
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
Patches
Vulnerability mechanics
References
11- git.kernel.org/stable/c/0f451b43c88bf2b9c038b414be580efee42e031bnvdPatch
- git.kernel.org/stable/c/1c428b03840094410c5fb6a5db30640486bbbfcbnvdPatch
- git.kernel.org/stable/c/5002beda5cac69d522dc54da0d5d463ed9c963d2nvdPatch
- access.redhat.com/errata/RHSA-2026:67471nvd
- access.redhat.com/errata/RHSA-2026:68531nvd
- access.redhat.com/errata/RHSA-2026:68532nvd
- access.redhat.com/errata/RHSA-2026:68570nvd
- access.redhat.com/security/cve/CVE-2026-31663nvd
- bugzilla.redhat.com/show_bug.cginvd
- git.kernel.org/stable/c/4236c30b437b80f673b9e08c8fae38b8d471ac9envd
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31663.jsonnvd
News mentions
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