High severity7.8NVD Advisory· Published Jun 25, 2026· Updated Jul 2, 2026
CVE-2026-53209
CVE-2026-53209
Description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend
Existing advertising instances can already hold the maximum extended advertising payload. When hci_adv_bcast_annoucement() prepends the Broadcast Announcement service data to that payload, the combined data may no longer fit in the temporary buffer used to rebuild the advertising data.
Reject that case before copying the existing payload and report the failure through the device log. This keeps the existing advertising data intact and avoids overrunning the temporary buffer.
Affected products
117- osv-coords102 versionspkg:rpm/almalinux/kernel-corepkg:rpm/almalinux/kernel-rt-debug-modules-corepkg:rpm/almalinux/kernel-modules-extra-matchedpkg:rpm/almalinux/kernel-rt-64k-debug-modulespkg:rpm/almalinux/kernel-rt-64k-debug-modules-corepkg:rpm/almalinux/kernel-rt-64k-develpkg:rpm/almalinux/kernel-rt-64k-modules-extrapkg:rpm/almalinux/kernel-rt-debugpkg:rpm/almalinux/kernel-rt-debug-develpkg:rpm/almalinux/kernel-rt-debug-modulespkg:rpm/almalinux/kernel-rt-debug-modules-extrapkg:rpm/almalinux/kernel-rt-modules-corepkg:rpm/almalinux/kernel-rt-modules-extrapkg: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-modulespkg:rpm/almalinux/rvpkg:apk/chainguard/linux-qemu-6.12pkg:rpm/almalinux/kernel-64k-debug-devel-matchedpkg:rpm/almalinux/kernel-64k-debug-modulespkg:rpm/almalinux/kernel-64k-debug-modules-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-modulespkg:rpm/almalinux/kernel-modules-corepkg:rpm/almalinux/kernel-rt-64kpkg:rpm/almalinux/kernel-rt-64k-corepkg:rpm/almalinux/kernel-rt-64k-debugpkg:rpm/almalinux/python3-perfpkg:rpm/almalinux/rtlapkg:apk/chainguard/linux-aws-6.18pkg:apk/chainguard/linux-azure-6.12pkg:apk/chainguard/linux-azure-6.18pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-64k-debugpkg:rpm/almalinux/kernelpkg:rpm/almalinux/kernel-64kpkg:rpm/almalinux/kernel-64k-corepkg:rpm/almalinux/kernel-64k-debug-corepkg:rpm/almalinux/kernel-64k-debug-develpkg: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-debugpkg:rpm/almalinux/kernel-debug-corepkg:rpm/almalinux/kernel-docpkg:rpm/almalinux/kernel-headerspkg:rpm/almalinux/kernel-modules-extrapkg:rpm/almalinux/kernel-rtpkg:rpm/almalinux/kernel-rt-64k-debug-corepkg:rpm/almalinux/kernel-rt-64k-debug-develpkg:rpm/almalinux/kernel-rt-64k-debug-modules-extrapkg:rpm/almalinux/kernel-rt-64k-modulespkg:rpm/almalinux/kernel-rt-64k-modules-corepkg:rpm/almalinux/kernel-rt-debug-corepkg:rpm/almalinux/kernel-rt-develpkg:rpm/almalinux/kernel-rt-modulespkg:rpm/almalinux/kernel-toolspkg:rpm/almalinux/kernel-zfcpdump-modules-corepkg:rpm/almalinux/kernel-zfcpdump-modules-extrapkg:rpm/almalinux/libperfpkg:rpm/almalinux/perfpkg:apk/chainguard/linux-gcp-6.18pkg:apk/chainguard/linux-qemu-6.18-bootc-boot-installedpkg:linux/kernelpkg:apk/chainguard/linux-vmware-6.18pkg:rpm/almalinux/kernel-64k-devel-matchedpkg:rpm/almalinux/kernel-64k-develpkg:rpm/almalinux/kernel-devel-matchedpkg:rpm/almalinux/kernel-debug-uki-virtpkg:rpm/almalinux/kernel-rt-corepkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:apk/chainguard/linux-aws-6.12pkg:apk/chainguard/linux-gcp-6.12pkg:apk/chainguard/linux-qemu-melangepkg:rpm/almalinux/kernel-zfcpdump-devel-matchedpkg:apk/chainguard/linux-vmware-6.12pkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:apk/chainguard/linux-qemu-6.18pkg:apk/chainguard/linux-gcp-6.18-bootc-boot-installedpkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-cross-headerspkg:rpm/almalinux/kernel-64k-debug-modules-extrapkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-develpkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&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/almalinux/kernel-debug-modules-extra
< 6.12.0-211.53.1.el10_2+ 101 more
- (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: < 6.12.95-r0
- (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: < 6.18.38-r0
- (no CPE)range: < 6.12.95-r0
- (no CPE)range: < 6.18.38-r0
- (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: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.1.176
- (no CPE)range: < 6.18.38-r0
- (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: < 6.12.95-r0
- (no CPE)range: < 6.12.95-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.95-r0
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (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: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-211.53.1.el10_2
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (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: < 6.12.0-211.53.1.el10_2
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 14 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=6.1.142,<6.1.176
- cpe:2.3:o:linux:linux_kernel:6.16:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.16:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.16:rc7:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*
- (no CPE)
Patches
Vulnerability mechanics
References
6- git.kernel.org/stable/c/02f50e8bb69f9b22516163a09922f5537d3b12d1nvdPatch
- git.kernel.org/stable/c/10b0e832cc05d7aef4b92bed912cbd4a395d0862nvdPatch
- git.kernel.org/stable/c/1338ee049a8910ba6c9cee963920e978e6893c7dnvdPatch
- git.kernel.org/stable/c/5c65b96b549ea2dcfde497436bf9e048deb87758nvdPatch
- git.kernel.org/stable/c/cdd8bbdbee763fdf5bf343e6f7d4e79347739f62nvdPatch
- git.kernel.org/stable/c/dafc9f57140e66a10945127aa7433c3d715dc253nvdPatch
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