UBUNTU-CVE-2025-38118: Use After Free

Q: What access does an attacker need to exploit this issue?

The severity vector indicates local access, low attack complexity, low privileges, and no user interaction are required. Exploitation can affect confidentiality, integrity, and availability.

Q: Which Ubuntu kernel packages are identified as affected?

The listed packages are ubuntu/linux-azure-fde, ubuntu/linux-realtime, ubuntu/linux-azure, ubuntu/linux-gcp, ubuntu/linux-gke, ubuntu/linux-gkeop, ubuntu/linux-riscv, and ubuntu/linux-aws-fips.

Q: What component is involved in the use-after-free condition?

The issue is in the Linux kernel Bluetooth management subsystem, specifically the advertising-monitor removal completion path. The reported crash occurs in mgmt_remove_adv_monitor_complete.

Published Jul 3, 2025

Updated

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix UAF on mgmtremoveadvmonitorcomplete This reworks MGMTOPREMOVEADVMONITOR to not use mgmtpendingadd to avoid crashes like bellow: ================================================================== BUG: KASAN: slab-use-after-free in mgmtremoveadvmonitorcomplete+0xe5/0x540 net/bluetooth/mgmt.c:5406 Read of size 8 at addr ffff88801c53f318 by task kworker/u5:5/5341 CPU: 0 UID: 0 PID: 5341 Comm: kworker/u5:5 Not tainted 6.15.0-syzkaller-10402-g4cb6c8af8591 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: hci0 hcicmdsyncwork Call Trace: <TASK> dumpstacklvl+0x189/0x250 lib/dumpstack.c:120 printaddressdescription mm/kasan/report.c:408 [inline] printreport+0xd2/0x2b0 mm/kasan/report.c:521 kasanreport+0x118/0x150 mm/kasan/report.c:634 mgmtremoveadvmonitorcomplete+0xe5/0x540 net/bluetooth/mgmt.c:5406 hcicmdsyncwork+0x261/0x3a0 net/bluetooth/hcisync.c:334 processonework kernel/workqueue.c:3238 [inline] processscheduledworks+0xade/0x17b0 kernel/workqueue.c:3321 workerthread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x711/0x8a0 kernel/kthread.c:464 retfromfork+0x3fc/0x770 arch/x86/kernel/process.c:148 retfromforkasm+0x1a/0x30 arch/x86/entry/entry64.S:245 </TASK> Allocated by task 5987: kasansavestack mm/kasan/common.c:47 [inline] kasansavetrack+0x3e/0x80 mm/kasan/common.c:68 poisonkmallocredzone mm/kasan/common.c:377 [inline] kasankmalloc+0x93/0xb0 mm/kasan/common.c:394 kasankmalloc include/linux/kasan.h:260 [inline] kmalloccachenoprof+0x230/0x3d0 mm/slub.c:4358 kmallocnoprof include/linux/slab.h:905 [inline] kzallocnoprof include/linux/slab.h:1039 [inline] mgmtpendingnew+0x65/0x240 net/bluetooth/mgmtutil.c:252 mgmtpendingadd+0x34/0x120 net/bluetooth/mgmtutil.c:279 removeadvmonitor+0x103/0x1b0 net/bluetooth/mgmt.c:5454 hcimgmtcmd+0x9c9/0xef0 net/bluetooth/hcisock.c:1719 hcisocksendmsg+0x6ca/0xef0 net/bluetooth/hcisock.c:1839 socksendmsgnosec net/socket.c:712 [inline] socksendmsg+0x219/0x270 net/socket.c:727 sockwriteiter+0x258/0x330 net/socket.c:1131 newsyncwrite fs/readwrite.c:593 [inline] vfswrite+0x548/0xa90 fs/readwrite.c:686 ksyswrite+0x145/0x250 fs/readwrite.c:738 dosyscallx64 arch/x86/entry/syscall64.c:63 [inline] dosyscall64+0xfa/0x3b0 arch/x86/entry/syscall64.c:94 entrySYSCALL64afterhwframe+0x77/0x7f Freed by task 5989: kasansavestack mm/kasan/common.c:47 [inline] kasansavetrack+0x3e/0x80 mm/kasan/common.c:68 kasansavefreeinfo+0x46/0x50 mm/kasan/generic.c:576 poisonslabobject mm/kasan/common.c:247 [inline] kasanslabfree+0x62/0x70 mm/kasan/common.c:264 kasanslabfree include/linux/kasan.h:233 [inline] slabfreehook mm/slub.c:2380 [inline] slabfree mm/slub.c:4642 [inline] kfree+0x18e/0x440 mm/slub.c:4841 mgmtpendingforeach+0xc9/0x120 net/bluetooth/mgmtutil.c:242 mgmtindexremoved+0x10d/0x2f0 net/bluetooth/mgmt.c:9366 hcisockbind+0xbe9/0x1000 net/bluetooth/hcisock.c:1314 sysbindsocket net/socket.c:1810 [inline] sysbind+0x2c3/0x3e0 net/socket.c:1841 dosysbind net/socket.c:1846 [inline] sesysbind net/socket.c:1844 [inline] x64sysbind+0x7a/0x90 net/socket.c:1844 dosyscallx64 arch/x86/entry/syscall64.c:63 [inline] dosyscall64+0xfa/0x3b0 arch/x86/entry/syscall64.c:94 entrySYSCALL64afterhwframe+0x77/0x7f

Affected Software

170 affected componentsFixes available

ubuntu/linux-hwe-edge*

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-azure*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-5.3*

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-edge*

ubuntu/linux-oem*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.15*

ubuntu/linux-aws-5.8*

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.15*

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-azure-fde-5.15*

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.15*

ubuntu/linux-gcp-5.8*

ubuntu/linux-gke*

ubuntu/linux-gke-5.15*

ubuntu/linux-gkeop*

ubuntu/linux-gkeop-5.15*

ubuntu/linux-hwe-5.11*

ubuntu/linux-hwe-5.13*

ubuntu/linux-hwe-5.15*

ubuntu/linux-hwe-5.8*

ubuntu/linux-ibm-5.15*

ubuntu/linux-intel-5.13*

ubuntu/linux-intel-iotg-5.15*

ubuntu/linux-lowlatency-hwe-5.15*

ubuntu/linux-nvidia-tegra-5.15*

ubuntu/linux-oem-5.10*

ubuntu/linux-oem-5.13*

ubuntu/linux-oem-5.6*

ubuntu/linux-oracle-5.11*

ubuntu/linux-oracle-5.13*

ubuntu/linux-oracle-5.15*

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.15*

ubuntu/linux-riscv-5.8*

ubuntu/linux*

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws*

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-aws-6.8<6.8.0-1042.44~22.04.1

6.8.0-1042.44~22.04.1

ubuntu/linux-azure*

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-6.8<6.8.0-1044.50~22.04.1

6.8.0-1044.50~22.04.1

ubuntu/linux-azure-fde*

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-azure-fde-6.8<6.8.0-1046.53~22.04.1

6.8.0-1046.53~22.04.1

ubuntu/linux-gcp*

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gcp-6.8<6.8.0-1043.46~22.04.1

6.8.0-1043.46~22.04.1

ubuntu/linux-gke*

ubuntu/linux-gkeop*

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-hwe-6.8<6.8.0-87.88~22.04.1

6.8.0-87.88~22.04.1

ubuntu/linux-ibm*

ubuntu/linux-ibm-6.8<6.8.0-1040.40~22.04.1

6.8.0-1040.40~22.04.1

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-intel-iotg*

ubuntu/linux-kvm*

ubuntu/linux-lowlatency*

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-lowlatency-hwe-6.8<6.8.0-87.88.1~22.04.1

6.8.0-87.88.1~22.04.1

ubuntu/linux-nvidia*

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-nvidia-6.8<6.8.0-1042.45~22.04.1

6.8.0-1042.45~22.04.1

ubuntu/linux-nvidia-tegra*

ubuntu/linux-nvidia-tegra-igx*

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle*

ubuntu/linux-oracle-6.5*

ubuntu/linux-oracle-6.8<6.8.0-1039.40~22.04.1

6.8.0-1039.40~22.04.1

ubuntu/linux-raspi*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-riscv-6.8<6.8.0-87.88~22.04.1

6.8.0-87.88~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-xilinx-zynqmp*

ubuntu/linux-bluefield*

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-realtime*

ubuntu/linux-realtime-6.8<6.8.1-1037.38~22.04.1

6.8.1-1037.38~22.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<6.8.0-87.88

6.8.0-87.88

ubuntu/linux-aws<6.8.0-1042.44

6.8.0-1042.44

ubuntu/linux-aws-6.14<6.14.0-1013.13~24.04.1

6.14.0-1013.13~24.04.1

ubuntu/linux-azure<6.8.0-1044.50

6.8.0-1044.50

ubuntu/linux-azure-6.11*

ubuntu/linux-azure-fde<6.8.0-1046.53

6.8.0-1046.53

ubuntu/linux-azure-nvidia<6.8.0-1029.32

6.8.0-1029.32

ubuntu/linux-azure-nvidia-6.14<6.14.0-1007.7

6.14.0-1007.7

ubuntu/linux-gcp<6.8.0-1043.46

6.8.0-1043.46

ubuntu/linux-gcp-6.11*

ubuntu/linux-gcp-6.14<6.14.0-1016.17~24.04.1

6.14.0-1016.17~24.04.1

ubuntu/linux-gke<6.8.0-1039.44

6.8.0-1039.44

ubuntu/linux-gkeop<6.8.0-1026.29

6.8.0-1026.29

ubuntu/linux-hwe-6.11*

ubuntu/linux-ibm<6.8.0-1040.40

6.8.0-1040.40

ubuntu/linux-intel*

ubuntu/linux-lowlatency<6.8.0-87.88.1

6.8.0-87.88.1

ubuntu/linux-lowlatency-hwe-6.11*

ubuntu/linux-nvidia<6.8.0-1042.45

6.8.0-1042.45

ubuntu/linux-nvidia-6.11*

ubuntu/linux-nvidia-lowlatency<6.8.0-1042.45.1

6.8.0-1042.45.1

ubuntu/linux-nvidia-tegra<6.8.0-1012.12

6.8.0-1012.12

ubuntu/linux-oem-6.11*

ubuntu/linux-oem-6.14<6.14.0-1012.12

6.14.0-1012.12

ubuntu/linux-oem-6.8*

ubuntu/linux-oracle<6.8.0-1039.40

6.8.0-1039.40

ubuntu/linux-oracle-6.14<6.14.0-1013.13~24.04.1

6.14.0-1013.13~24.04.1

ubuntu/linux-raspi<6.8.0-1042.46

6.8.0-1042.46

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-6.14<6.14.0-32.32.1~24.04.1

6.14.0-32.32.1~24.04.1

ubuntu/linux-xilinx<6.8.0-1019.20

6.8.0-1019.20

ubuntu/linux-bluefield<6.8.0-1013.17

6.8.0-1013.17

ubuntu/linux-raspi-realtime<6.8.0-2033.34

6.8.0-2033.34

ubuntu/linux-realtime<6.8.1-1037.38

6.8.1-1037.38

ubuntu/linux-realtime-6.14<6.14.0-1012.12~24.04.1

6.14.0-1012.12~24.04.1

ubuntu/linux-aws-fips<6.8.0-1042.44+fips1

6.8.0-1042.44+fips1

ubuntu/linux-azure-fips<6.8.0-1044.50+fips1

6.8.0-1044.50+fips1

ubuntu/linux-fips<6.8.0-87.88+fips1

6.8.0-87.88+fips1

ubuntu/linux-gcp-fips<6.8.0-1043.46+fips1

6.8.0-1043.46+fips1

ubuntu/linux-azure-fde*

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux-aws-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1042.44~22.04.1
Upgrade
Upgrade ubuntu/linux-azure-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1044.50~22.04.1
Upgrade
Upgrade ubuntu/linux-azure-fde-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1046.53~22.04.1
Upgrade
Upgrade ubuntu/linux-gcp-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1043.46~22.04.1
Upgrade
Upgrade ubuntu/linux-hwe-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-87.88~22.04.1
Upgrade
Upgrade ubuntu/linux-ibm-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1040.40~22.04.1
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-87.88.1~22.04.1
Upgrade
Upgrade ubuntu/linux-nvidia-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1042.45~22.04.1
Upgrade
Upgrade ubuntu/linux-oracle-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1039.40~22.04.1
Upgrade
Upgrade ubuntu/linux-riscv-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-87.88~22.04.1
Upgrade
Upgrade ubuntu/linux-realtime-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.1-1037.38~22.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 6.8.0-87.88
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 6.8.0-1042.44
Upgrade
Upgrade ubuntu/linux-aws-6.14 to a version that resolves this vulnerability.
Fixed in 6.14.0-1013.13~24.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 6.8.0-1044.50
Upgrade
Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.
Fixed in 6.8.0-1046.53
Upgrade
Upgrade ubuntu/linux-azure-nvidia to a version that resolves this vulnerability.
Fixed in 6.8.0-1029.32
Upgrade
Upgrade ubuntu/linux-azure-nvidia-6.14 to a version that resolves this vulnerability.
Fixed in 6.14.0-1007.7
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 6.8.0-1043.46
Upgrade
Upgrade ubuntu/linux-gcp-6.14 to a version that resolves this vulnerability.
Fixed in 6.14.0-1016.17~24.04.1
Upgrade
Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.
Fixed in 6.8.0-1039.44
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 6.8.0-1026.29
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 6.8.0-1040.40
Upgrade
Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 6.8.0-87.88.1
Upgrade
Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 6.8.0-1042.45
Upgrade
Upgrade ubuntu/linux-nvidia-lowlatency to a version that resolves this vulnerability.
Fixed in 6.8.0-1042.45.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.
Fixed in 6.8.0-1012.12
Upgrade
Upgrade ubuntu/linux-oem-6.14 to a version that resolves this vulnerability.
Fixed in 6.14.0-1012.12
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 6.8.0-1039.40
Upgrade
Upgrade ubuntu/linux-oracle-6.14 to a version that resolves this vulnerability.
Fixed in 6.14.0-1013.13~24.04.1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 6.8.0-1042.46
Upgrade
Upgrade ubuntu/linux-riscv-6.14 to a version that resolves this vulnerability.
Fixed in 6.14.0-32.32.1~24.04.1
Upgrade
Upgrade ubuntu/linux-xilinx to a version that resolves this vulnerability.
Fixed in 6.8.0-1019.20
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 6.8.0-1013.17
Upgrade
Upgrade ubuntu/linux-raspi-realtime to a version that resolves this vulnerability.
Fixed in 6.8.0-2033.34
Upgrade
Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 6.8.1-1037.38
Upgrade
Upgrade ubuntu/linux-realtime-6.14 to a version that resolves this vulnerability.
Fixed in 6.14.0-1012.12~24.04.1
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 6.8.0-1042.44+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 6.8.0-1044.50+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 6.8.0-87.88+fips1
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 6.8.0-1043.46+fips1

Event History

Jul 3, 2025

CVE Published

via OSV·09:15 AM

Data Sourced

via OSV·09:15 AM

DescriptionSeverityAffected Software

Frequently Asked Questions

What access does an attacker need to exploit this issue?

The severity vector indicates local access, low attack complexity, low privileges, and no user interaction are required. Exploitation can affect confidentiality, integrity, and availability.

Which Ubuntu kernel packages are identified as affected?

The listed packages are ubuntu/linux-azure-fde, ubuntu/linux-realtime, ubuntu/linux-azure, ubuntu/linux-gcp, ubuntu/linux-gke, ubuntu/linux-gkeop, ubuntu/linux-riscv, and ubuntu/linux-aws-fips.

What component is involved in the use-after-free condition?

The issue is in the Linux kernel Bluetooth management subsystem, specifically the advertising-monitor removal completion path. The reported crash occurs in mgmt_remove_adv_monitor_complete.

UBUNTU-CVE-2025-38118: Use After Free

Affected Software

Remediation

Event History

Frequently Asked Questions

What access does an attacker need to exploit this issue?

Which Ubuntu kernel packages are identified as affected?

What component is involved in the use-after-free condition?

Company

Resources

Contact

Frequently Asked Questions

What access does an attacker need to exploit this issue?

Which Ubuntu kernel packages are identified as affected?

What component is involved in the use-after-free condition?