High severity8.8NVD Advisory· Published Jul 19, 2026· Updated Oct 16, 2026
CVE-2026-63946
CVE-2026-63946
Description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: ISO: fix UAF in iso_recv_frame
iso_recv_frame reads conn->sk under iso_conn_lock but releases the lock before using sk, with no reference held. A concurrent iso_sock_kill() can free sk in that window, causing use-after-free on sk->sk_state and sock_queue_rcv_skb().
Fix by replacing the bare pointer read with iso_sock_hold(conn), which calls sock_hold() while the spinlock is held, atomically elevating the refcount before the lock drops. Add a drop_put label so sock_put() is called on all exit paths where the hold succeeded.
Affected products
90- osv-coords89 versionspkg:rpm/almalinux/kernel-modulespkg:linux/kernelpkg:rpm/opensuse/dtb-aarch64&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-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-uki-virt-addonspkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-rt-64k-develpkg:rpm/almalinux/kernel-64kpkg:rpm/almalinux/kernel-64k-debug-modulespkg:rpm/almalinux/kernel-64k-modules-extrapkg:rpm/almalinux/kernel-debug-corepkg:rpm/almalinux/kernel-rt-64kpkg:rpm/almalinux/kernel-cross-headerspkg:rpm/almalinux/kernel-modules-extrapkg:rpm/almalinux/kernel-rt-corepkg:rpm/almalinux/kernel-zfcpdump-devel-matchedpkg:rpm/almalinux/kernel-debug-modulespkg:rpm/almalinux/kernel-rt-64k-modules-extrapkg:rpm/almalinux/libperfpkg:rpm/almalinux/kernel-devel-matchedpkg:rpm/almalinux/kernel-rt-debug-modules-extrapkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-debug-devel-matchedpkg:rpm/almalinux/kernel-rt-64k-debug-modules-corepkg:rpm/almalinux/kernel-64k-debugpkg:rpm/almalinux/kernel-debug-modules-corepkg:rpm/almalinux/kernel-rt-64k-debug-develpkg:rpm/almalinux/kernel-rt-develpkg:rpm/almalinux/kernel-64k-corepkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-64k-develpkg:rpm/almalinux/kernel-develpkg:rpm/almalinux/kernel-toolspkg:rpm/almalinux/kernel-64k-debug-modules-corepkg:rpm/almalinux/kernel-debugpkg:rpm/almalinux/kernel-debug-develpkg:rpm/almalinux/kernel-headerspkg:rpm/almalinux/kernelpkg:rpm/almalinux/kernel-64k-debug-corepkg:rpm/almalinux/kernel-64k-debug-develpkg:rpm/almalinux/kernel-docpkg:rpm/almalinux/kernel-modules-corepkg:rpm/almalinux/kernel-rt-64k-modulespkg:rpm/almalinux/kernel-rt-64k-modules-corepkg:rpm/almalinux/kernel-rt-debug-modules-corepkg:rpm/almalinux/kernel-rt-modules-extrapkg:rpm/almalinux/kernel-zfcpdump-develpkg:rpm/almalinux/kernel-debug-uki-virtpkg:rpm/almalinux/kernel-rtpkg:rpm/almalinux/kernel-uki-virtpkg:rpm/almalinux/perfpkg:rpm/almalinux/kernel-64k-devel-matchedpkg:rpm/almalinux/kernel-rt-64k-corepkg:rpm/almalinux/kernel-rt-64k-debugpkg:rpm/almalinux/kernel-rt-64k-debug-corepkg:rpm/almalinux/kernel-rt-debug-modulespkg:rpm/almalinux/kernel-zfcpdump-modules-corepkg:rpm/almalinux/kernel-rt-64k-debug-modulespkg:rpm/almalinux/kernel-rt-64k-debug-modules-extrapkg:rpm/almalinux/kernel-rt-debug-develpkg:rpm/almalinux/kernel-zfcpdump-corepkg:rpm/almalinux/kernel-64k-debug-modules-extrapkg:rpm/almalinux/kernel-64k-modulespkg:rpm/almalinux/kernel-tools-libs-develpkg:rpm/almalinux/kernel-abi-stablelistspkg:rpm/almalinux/kernel-rt-debug-corepkg:rpm/almalinux/kernel-tools-libspkg:rpm/almalinux/kernel-zfcpdumppkg:rpm/almalinux/kernel-zfcpdump-modulespkg:rpm/almalinux/rvpkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-64k-debug-devel-matchedpkg:rpm/almalinux/kernel-64k-modules-corepkg:rpm/almalinux/kernel-corepkg:rpm/almalinux/kernel-rt-debugpkg:rpm/almalinux/kernel-rt-modulespkg:rpm/almalinux/kernel-rt-modules-corepkg:rpm/almalinux/kernel-zfcpdump-modules-extrapkg:rpm/almalinux/python3-perfpkg:rpm/almalinux/rtlapkg:rpm/almalinux/kernel-modules-extra-matchedpkg:rpm/almalinux/kernel-debug-modules-extra
< 6.12.0-211.53.1.el10_2+ 88 more
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: >= 6.0.0, < 6.1.176
- (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: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-160000.37.1.160000.2.19
- (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: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-211.53.1.el10_2
Patches
Vulnerability mechanics
References
6- git.kernel.org/stable/c/119fb6f80c44dc1c65d604cf28e64c56bd9b6568nvd
- git.kernel.org/stable/c/1a6b803b00ccdd7666506adbe01ddae1c72d1ca9nvd
- git.kernel.org/stable/c/47f23a259517abbdb8032c057a1e8a6bf3734878nvd
- git.kernel.org/stable/c/b04ec131325baf4ea4577d6c6e6b86cf092e3731nvd
- git.kernel.org/stable/c/c318aa51830a3d2cc1229968fe521441c97356cdnvd
- git.kernel.org/stable/c/c57ea90f203c8b8b41a474f19a09000d0f841436nvd
News mentions
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