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
29cpe: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)
- osv-coords14 versionspkg:apk/chainguard/linux-aws-6.12pkg:apk/chainguard/linux-aws-6.18pkg:apk/chainguard/linux-azure-6.12pkg:apk/chainguard/linux-azure-6.18pkg:apk/chainguard/linux-gcp-6.12pkg:apk/chainguard/linux-gcp-6.18pkg:apk/chainguard/linux-gcp-6.18-bootc-boot-installedpkg:apk/chainguard/linux-qemu-6.12pkg:apk/chainguard/linux-qemu-6.18pkg:apk/chainguard/linux-qemu-6.18-bootc-boot-installedpkg:apk/chainguard/linux-qemu-melangepkg:apk/chainguard/linux-vmware-6.12pkg:apk/chainguard/linux-vmware-6.18pkg:linux/kernel
< 6.12.95-r0+ 13 more
- (no CPE)range: < 6.12.95-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.12.95-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.12.95-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.12.95-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.12.95-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.1.176
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
News mentions
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