High severity7.8NVD Advisory· Published Jul 19, 2026· Updated Oct 16, 2026
CVE-2026-63824
CVE-2026-63824
Description
In the Linux kernel, the following vulnerability has been resolved:
KEYS: fix overflow in keyctl_pkey_params_get_2()
The length for the internal output buffer is calculated incorrectly, which can result overflow when a too small buffer is provided.
Fix the bug by allocating internal output with the size of the maximum length of the cryptographic primitive instead of caller provided size.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
91- osv-coords90 versionspkg:rpm/almalinux/kernel-uki-virtpkg:rpm/almalinux/kernel-zfcpdump-devel-matchedpkg:rpm/almalinux/kernel-rt-64k-debug-modules-corepkg:rpm/almalinux/kernel-zfcpdump-modules-corepkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweedpkg:rpm/almalinux/kernel-64k-debug-devel-matchedpkg:rpm/almalinux/kernel-develpkg:rpm/almalinux/kernel-rtpkg:rpm/almalinux/kernel-rt-corepkg:rpm/almalinux/kernel-zfcpdumppkg:rpm/almalinux/kernel-rt-64k-debugpkg:rpm/almalinux/kernel-modules-extrapkg:rpm/almalinux/kernel-rt-debugpkg:rpm/almalinux/kernel-64kpkg:rpm/almalinux/kernel-cross-headerspkg:rpm/almalinux/kernel-debugpkg:rpm/almalinux/kernel-rt-64kpkg:rpm/almalinux/kernel-rt-64k-debug-modulespkg:rpm/almalinux/kernel-rt-modules-corepkg:rpm/almalinux/rvpkg:rpm/almalinux/kernel-abi-stablelistspkg:rpm/almalinux/kernel-debug-devel-matchedpkg:rpm/almalinux/kernel-rt-64k-modules-corepkg:rpm/almalinux/kernel-toolspkg:rpm/almalinux/kernel-zfcpdump-modulespkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernelpkg:rpm/almalinux/kernel-rt-debug-modules-extrapkg:rpm/almalinux/python3-perfpkg:rpm/almalinux/kernel-rt-64k-corepkg:rpm/almalinux/kernel-rt-debug-modulespkg:rpm/almalinux/kernel-rt-develpkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:linux/kernelpkg:rpm/almalinux/kernel-tools-libs-develpkg:rpm/almalinux/kernel-64k-corepkg:rpm/almalinux/kernel-debug-modulespkg:rpm/almalinux/kernel-debug-modules-corepkg:rpm/almalinux/perfpkg: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-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-64k-devel-matchedpkg:rpm/almalinux/kernel-64k-debug-modules-corepkg:rpm/almalinux/kernel-64k-modules-corepkg:rpm/almalinux/kernel-rt-debug-corepkg:rpm/almalinux/kernel-modules-extra-matchedpkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-debug-modules-extrapkg:rpm/almalinux/kernel-devel-matchedpkg:rpm/almalinux/kernel-rt-debug-develpkg:rpm/almalinux/kernel-rt-debug-modules-corepkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-64k-develpkg:rpm/almalinux/kernel-64k-modulespkg:rpm/almalinux/kernel-64k-modules-extrapkg:rpm/almalinux/kernel-corepkg:rpm/almalinux/kernel-debug-corepkg:rpm/almalinux/kernel-modulespkg:rpm/almalinux/kernel-modules-corepkg:rpm/almalinux/kernel-rt-64k-modules-extrapkg:rpm/almalinux/kernel-rt-modulespkg:rpm/almalinux/kernel-64k-debug-develpkg:rpm/almalinux/kernel-debug-develpkg:rpm/almalinux/kernel-debug-uki-virtpkg:rpm/almalinux/kernel-rt-64k-modulespkg:rpm/almalinux/kernel-rt-modules-extrapkg:rpm/almalinux/kernel-uki-virt-addonspkg:rpm/almalinux/kernel-64k-debug-modules-extrapkg:rpm/almalinux/kernel-rt-64k-develpkg:rpm/almalinux/kernel-zfcpdump-corepkg:rpm/almalinux/kernel-rt-64k-debug-modules-extrapkg:rpm/almalinux/kernel-64k-debug-modulespkg:rpm/almalinux/kernel-docpkg:rpm/almalinux/kernel-rt-64k-debug-develpkg:rpm/almalinux/libperfpkg:rpm/almalinux/kernel-rt-64k-debug-corepkg:rpm/almalinux/kernel-64k-debugpkg:rpm/almalinux/kernel-64k-debug-corepkg:rpm/almalinux/kernel-headerspkg:rpm/almalinux/kernel-tools-libspkg:rpm/almalinux/kernel-zfcpdump-develpkg:rpm/almalinux/rtlapkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-zfcpdump-modules-extra
< 6.12.0-211.51.1.el10_2+ 89 more
- (no CPE)range: < 6.12.0-211.51.1.el10_2
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- (no CPE)range: < 7.1.4-1.1
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- (no CPE)range: < 6.12.0-160000.37.1.160000.2.19
- (no CPE)range: < 6.12.0-211.51.1.el10_2
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- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: >= 4.20.0, < 5.10.260
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
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- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
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- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
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- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
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- (no CPE)range: < 6.12.0-211.51.1.el10_2
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- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-211.51.1.el10_2
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-211.51.1.el10_2
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/0f3058d7d26f81df9b68a18ddbe164bdc3c5eff3nvd
- git.kernel.org/stable/c/5165f1cc727f1322456735df212d8e26ec237a8dnvd
- git.kernel.org/stable/c/5966e4e2ba213ab7ad559166152eb4f1f170dd2cnvd
- git.kernel.org/stable/c/622ec2dcd59f21623f2a7ab773c80ceb7d555e3anvd
- git.kernel.org/stable/c/670fc6a311ed321522b7fff92cf0fc376b4f6e78nvd
- git.kernel.org/stable/c/b11c1fa32667692a2c0566e10163758e786e430cnvd
- git.kernel.org/stable/c/b1e247338bc71826a2d2def3e0874c34749df69anvd
- git.kernel.org/stable/c/cb481e59ea6cae3b7796ac1d7a22b6b24c3f3c0bnvd
News mentions
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