In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: L2CAP: Fix user-after-free
This uses l2cap_chan_hold_unless_zero() after calling __l2cap_get_chan_blah() to prevent the following trace:
Bluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref *kref) Bluetooth: chan 0000000023c4974d Bluetooth: parent 00000000ae861c08 ================================================================== BUG: KASAN: use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:191 [inline] BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:671 [inline] BUG: KASAN: use-after-free in __mutex_lock+0x278/0x400 kernel/locking/mutex.c:729 Read of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389
CVSS Details
- CVSS 3.1 Base Score: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade kernel-toolsUpgrade kernel-debug-modules-extraUpgrade kernel-abi-stablelistsUpgrade kernel-zfcpdumpUpgrade kernel-zfcpdump-modulesUpgrade kernel-docUpgrade kernel-rt-debug-coreUpgrade kernel-headersUpgrade kernel-rt-modulesUpgrade kernel-rtUpgrade kernel-rt-debug-modules-extraUpgrade kernel-zfcpdump-coreUpgrade kernel-tools-libs-develUpgrade kernel-debug-modulesUpgrade kernel-modules-extraUpgrade kernel-cross-headersUpgrade kernel-debug-coreUpgrade kernel-rt-modules-extraUpgrade python3-perfUpgrade bpftoolUpgrade kernelUpgrade kernel-rt-debug-modulesUpgrade kernel-debug-develUpgrade kernel-rt-coreUpgrade kernel-coreUpgrade kernel-zfcpdump-develUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-develUpgrade kernel-rt-develUpgrade perfUpgrade kernel-tools-libsUpgrade kernel-rt-debug-develUpgrade kernel-rt-debugUpgrade kernel-debugUpgrade kernel-modules | Oct 29, 2025 | Oct 27, 2025 |
| Amazon Linux Ami 2 | — | Upgrade kernel-headersUpgrade kernel-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-livepatch-4.14.296-222.539Upgrade kernel-tools-develUpgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade python-perfUpgrade perfUpgrade kernel-develUpgrade perf-debuginfoUpgrade kernel-toolsUpgrade kernel-debuginfo-common-aarch64 | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Sep 22, 2025 | Sep 22, 2025 |
| Oracle_linux | — | Upgrade kernel | Oct 29, 2025 | Sep 18, 2025 |
| Redhat_linux | — | No solution existsUpgrade kernelUpgrade kernel-rt | Oct 28, 2025 | Sep 18, 2025 |
| Rocky_linux | — | Upgrade kernel-rt-modules-extraUpgrade kernel-rt-modulesUpgrade kernel-debug-modules-extraUpgrade kernel-tools-libs-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-rt-debuginfoUpgrade perf-debuginfoUpgrade kernel-debug-modulesUpgrade kernel-toolsUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rtUpgrade bpftool-debuginfoUpgrade kernel-debug-debuginfoUpgrade kernel-debug-develUpgrade kernel-coreUpgrade kernelUpgrade kernel-rt-debug-coreUpgrade kernel-rt-debugUpgrade kernel-debuginfoUpgrade kernel-debugUpgrade kernel-tools-debuginfoUpgrade kernel-rt-debug-debuginfoUpgrade kernel-modulesUpgrade kernel-rt-debuginfo-common-x86_64Upgrade python3-perf-debuginfoUpgrade python3-perfUpgrade kernel-rt-debug-modulesUpgrade kernel-develUpgrade kernel-modules-extraUpgrade kernel-rt-debug-develUpgrade kernel-debug-coreUpgrade bpftoolUpgrade kernel-rt-kvmUpgrade kernel-tools-libsUpgrade kernel-rt-debug-kvmUpgrade kernel-rt-coreUpgrade perfUpgrade kernel-rt-devel | Feb 5, 2026 | Nov 2, 2025 |
| Ubuntu | — | Upgrade linux-hweUpgrade linux-gcp-fipsUpgrade linux-oracle-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-gkeopUpgrade linux-aws-fipsUpgrade linux-gcp-5.4Upgrade linux-riscv-5.15Upgrade linux-hwe-5.15Upgrade linux-oracleUpgrade linux-azure-5.4Upgrade linux-xilinx-zynqmpUpgrade linux-lowlatencyUpgrade linux-azure-fde-5.15Upgrade linux-realtimeUpgrade linux-gcp-4.15Upgrade linux-nvidiaUpgrade linux-intel-iotgUpgrade linux-gcp-5.15Upgrade linux-hwe-5.4Upgrade linux-ibmUpgrade linux-fipsUpgrade linux-azure-4.15Upgrade linux-kvmUpgrade linux-azure-fipsUpgrade linux-azureUpgrade linux-aws-hweUpgrade linux-iot | Sep 26, 2025 | Sep 18, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Sep 18, 2025 |
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