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🛡️ CVE-2024-49950 on Ubuntu — linux

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix uaf in l2cap_connect [Syzbot reported] BUG: KASAN: slab-use-after-free in l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949 Read of size 8 at addr ffff8880241e9800 by task kworker/u9:0/54 CPU: 0 UID: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: hci2 hci_rx_work Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949 l2cap_connect_req net/bluetooth/l2cap_core.c:4080 [inline] l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:4772 [inline] l2cap_sig_channel net/bluetooth/l2cap_core.c:5543 [inline] l2cap_recv_frame+0xf0b/0x8eb0 net/bluetooth/l2cap_core.c:6825 l2cap_recv_acldata+0x9b4/0xb70 net/bluetooth/l2cap_core.c:7514 hci_acldata_packet net/bluetooth/hci_core.c:3791 [inline] hci_rx_work+0xaab/0x1610 net/bluetooth/hci_core.c:4028 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ... Freed by task 5245: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2256 [inline] slab_free mm/slub.c:4477 [inline] kfree+0x12a/0x3b0 mm/slub.c:4598 l2cap_conn_free net/bluetooth/l2cap_core.c:1810 [inline] kref_put include/linux/kref.h:65 [inline] l2cap_conn_put net/bluetooth/l2cap_core.c:1822 [inline] l2cap_conn_del+0x59d/0x730 net/bluetooth/l2cap_core.c:1802 l2cap_connect_cfm+0x9e6/0xf80 net/bluetooth/l2cap_core.c:7241 hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline] hci_conn_failed+0x1c3/0x370 net/bluetooth/hci_conn.c:1265 hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5583 abort_conn_sync+0x197/0x360 net/bluetooth/hci_conn.c:2917 hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:328 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Distribution advisory

This page covers CVE-2024-49950 as tracked by Ubuntu, for the package linux. The fix is available in version 6.8.0-54.56; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached from an adjacent network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Adjacent network — the attacker has to sit on the same local or logical network.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

UBUNTU-CVE-2024-49950 is classified as CWE-416: Use After Free. Memory is used after being released, so its contents may already belong to something else.

Affected software

UBUNTU-CVE-2024-49950 is recorded against 134 packages.

  • linux (fixed in 6.8.0-54.56)
  • linux-allwinner-5.19
  • linux-aws (fixed in 6.8.0-1023.25)
  • linux-aws-5.0
  • linux-aws-5.11
  • linux-aws-5.13
  • linux-aws-5.15 (fixed in 5.15.0-1080.87~20.04.1)
  • linux-aws-5.19
  • linux-aws-5.3
  • linux-aws-5.4 (fixed in 5.4.0-1149.159~18.04.1)
  • linux-aws-5.8
  • linux-aws-6.2
  • linux-aws-6.5
  • linux-aws-6.8 (fixed in 6.8.0-1023.25~22.04.1)
  • linux-aws-fips (fixed in 5.15.0-1080.87+fips1)
  • linux-aws-hwe (fixed in 4.15.0-1183.196~16.04.1)
  • linux-azure (fixed in 6.8.0-1025.30)
  • linux-azure-4.15 (fixed in 4.15.0-1191.206)
  • linux-azure-5.11
  • linux-azure-5.13
  • linux-azure-5.15 (fixed in 5.15.0-1086.95~20.04.1)
  • linux-azure-5.19
  • linux-azure-5.3
  • linux-azure-5.4 (fixed in 5.4.0-1154.161~18.04.1)
Show the remaining 110 packages
  • linux-azure-5.8
  • linux-azure-6.11 (fixed in 6.11.0-1012.12~24.04.1)
  • linux-azure-6.2
  • linux-azure-6.5
  • linux-azure-6.8 (fixed in 6.8.0-1025.30~22.04.1)
  • linux-azure-edge
  • linux-azure-fde
  • linux-azure-fde-5.19
  • linux-azure-fde-6.2
  • linux-azure-fips (fixed in 5.15.0-1083.92+fips1)
  • linux-azure-nvidia (fixed in 6.8.0-1014.15)
  • linux-bluefield
  • linux-fips (fixed in 6.8.0-78.78+fips1)
  • linux-gcp (fixed in 6.8.0-1024.26)
  • linux-gcp-4.15 (fixed in 4.15.0-1176.193)
  • linux-gcp-5.11
  • linux-gcp-5.13
  • linux-gcp-5.15 (fixed in 5.15.0-1081.90~20.04.1)
  • linux-gcp-5.19
  • linux-gcp-5.3
  • linux-gcp-5.4 (fixed in 5.4.0-1152.161~18.04.1)
  • linux-gcp-5.8
  • linux-gcp-6.11 (fixed in 6.11.0-1011.11~24.04.1)
  • linux-gcp-6.2
  • linux-gcp-6.5
  • linux-gcp-6.8 (fixed in 6.8.0-1024.26~22.04.1)
  • linux-gcp-fips (fixed in 5.15.0-1079.88+fips1)
  • linux-gke (fixed in 6.8.0-1019.23)
  • linux-gke-4.15
  • linux-gke-5.15
  • linux-gke-5.4
  • linux-gkeop (fixed in 6.8.0-1006.8)
  • linux-gkeop-5.15
  • linux-gkeop-5.4
  • linux-hwe
  • linux-hwe-5.11
  • linux-hwe-5.13
  • linux-hwe-5.15 (fixed in 5.15.0-136.147~20.04.1)
  • linux-hwe-5.19
  • linux-hwe-5.4 (fixed in 5.4.0-220.240~18.04.1)
  • linux-hwe-5.8
  • linux-hwe-6.2
  • linux-hwe-6.5
  • linux-hwe-6.8 (fixed in 6.8.0-57.59~22.04.1)
  • linux-hwe-edge
  • linux-ibm (fixed in 6.8.0-1022.22)
  • linux-ibm-5.15 (fixed in 5.15.0-1074.77~20.04.1)
  • linux-ibm-5.4 (fixed in 5.4.0-1095.100~18.04.1)
  • linux-ibm-6.8 (fixed in 6.8.0-1023.23~22.04.1)
  • linux-intel-5.13
  • linux-intel-iot-realtime (fixed in 5.15.0-1073.75)
  • linux-intel-iotg (fixed in 5.15.0-1075.81)
  • linux-intel-iotg-5.15 (fixed in 5.15.0-1077.83~20.04.1)
  • linux-iot (fixed in 5.4.0-1053.56)
  • linux-kvm (fixed in 5.15.0-1076.81)
  • linux-lowlatency (fixed in 6.8.0-54.56.1)
  • linux-lowlatency-hwe-5.15 (fixed in 5.15.0-135.146~20.04.1)
  • linux-lowlatency-hwe-5.19
  • linux-lowlatency-hwe-6.2
  • linux-lowlatency-hwe-6.5
  • linux-lowlatency-hwe-6.8 (fixed in 6.8.0-54.56.1~22.04.1)
  • linux-lts-xenial (fixed in 4.4.0-271.305~14.04.1)
  • linux-nvidia (fixed in 6.8.0-1022.25)
  • linux-nvidia-6.11 (fixed in 6.11.0-1007.7)
  • linux-nvidia-6.2
  • linux-nvidia-6.5
  • linux-nvidia-6.8 (fixed in 6.8.0-1022.25~22.04.2)
  • linux-nvidia-lowlatency (fixed in 6.8.0-1022.25.2)
  • linux-nvidia-tegra (fixed in 5.15.0-1033.33)
  • linux-nvidia-tegra-5.15 (fixed in 5.15.0-1039.39~20.04.1)
  • linux-nvidia-tegra-igx (fixed in 5.15.0-1021.21)
  • linux-oem
  • linux-oem-5.10
  • linux-oem-5.13
  • linux-oem-5.14
  • linux-oem-5.17
  • linux-oem-5.6
  • linux-oem-6.0
  • linux-oem-6.1
  • linux-oem-6.11 (fixed in 6.11.0-1015.15)
  • linux-oem-6.5
  • linux-oem-6.8 (fixed in 6.8.0-1024.24)
  • linux-oracle (fixed in 6.8.0-1020.21)
  • linux-oracle-5.0
  • linux-oracle-5.11
  • linux-oracle-5.13
  • linux-oracle-5.15 (fixed in 5.15.0-1077.83~20.04.1)
  • linux-oracle-5.3
  • linux-oracle-5.4 (fixed in 5.4.0-1148.158~18.04.1)
  • linux-oracle-5.8
  • linux-oracle-6.5
  • linux-oracle-6.8 (fixed in 6.8.0-1020.21~22.04.1)
  • linux-raspi (fixed in 6.8.0-1019.23)
  • linux-raspi-5.4 (fixed in 5.4.0-1132.145~18.04.1)
  • linux-raspi-realtime (fixed in 6.8.0-2018.19)
  • linux-raspi2
  • linux-realtime (fixed in 6.8.1-1016.17)
  • linux-realtime-6.8 (fixed in 6.8.1-1016.17~22.04.1)
  • linux-riscv (fixed in 6.8.0-53.55.1)
  • linux-riscv-5.11
  • linux-riscv-5.15 (fixed in 5.15.0-1075.79~20.04.1)
  • linux-riscv-5.19
  • linux-riscv-5.8
  • linux-riscv-6.5
  • linux-riscv-6.8 (fixed in 6.8.0-53.55.1~22.04.1)
  • linux-starfive-5.19
  • linux-starfive-6.2
  • linux-starfive-6.5
  • linux-xilinx (fixed in 6.8.0-1017.18)
  • linux-xilinx-zynqmp (fixed in 5.15.0-1044.48)

Timeline and source

Published on 21 October 2024 and last revised on 18 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
www.cve.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)

Other advisories for this package

linux has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-416: Use After Free) in other software:

CVE-2024-49950 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2024-10-21
Updated 2026-08-20
Modified 2026-08-18
Fix URL N/A

Affected Packages

Software From version Fixed in
linux — 6.8.0-54.56
linux-allwinner-5.19 — —
linux-aws — 6.8.0-1023.25
linux-aws-5.0 — —
linux-aws-5.11 — —
linux-aws-5.13 — —
linux-aws-5.15 — 5.15.0-1080.87~20.04.1
linux-aws-5.19 — —
linux-aws-5.3 — —
linux-aws-5.4 — 5.4.0-1149.159~18.04.1
linux-aws-5.8 — —
linux-aws-6.2 — —
linux-aws-6.5 — —
linux-aws-6.8 — 6.8.0-1023.25~22.04.1
linux-aws-fips — 5.15.0-1080.87+fips1
linux-aws-hwe — 4.15.0-1183.196~16.04.1
linux-azure — 6.8.0-1025.30
linux-azure-4.15 — 4.15.0-1191.206
linux-azure-5.11 — —
linux-azure-5.13 — —
linux-azure-5.15 — 5.15.0-1086.95~20.04.1
linux-azure-5.19 — —
linux-azure-5.3 — —
linux-azure-5.4 — 5.4.0-1154.161~18.04.1
linux-azure-5.8 — —
linux-azure-6.11 — 6.11.0-1012.12~24.04.1
linux-azure-6.2 — —
linux-azure-6.5 — —
linux-azure-6.8 — 6.8.0-1025.30~22.04.1
linux-azure-edge — —
linux-azure-fde — —
linux-azure-fde-5.19 — —
linux-azure-fde-6.2 — —
linux-azure-fips — 5.15.0-1083.92+fips1
linux-azure-nvidia — 6.8.0-1014.15
linux-bluefield — —
linux-fips — 6.8.0-78.78+fips1
linux-gcp — 6.8.0-1024.26
linux-gcp-4.15 — 4.15.0-1176.193
linux-gcp-5.11 — —
linux-gcp-5.13 — —
linux-gcp-5.15 — 5.15.0-1081.90~20.04.1
linux-gcp-5.19 — —
linux-gcp-5.3 — —
linux-gcp-5.4 — 5.4.0-1152.161~18.04.1
linux-gcp-5.8 — —
linux-gcp-6.11 — 6.11.0-1011.11~24.04.1
linux-gcp-6.2 — —
linux-gcp-6.5 — —
linux-gcp-6.8 — 6.8.0-1024.26~22.04.1
linux-gcp-fips — 5.15.0-1079.88+fips1
linux-gke — 6.8.0-1019.23
linux-gke-4.15 — —
linux-gke-5.15 — —
linux-gke-5.4 — —
linux-gkeop — 6.8.0-1006.8
linux-gkeop-5.15 — —
linux-gkeop-5.4 — —
linux-hwe — —
linux-hwe-5.11 — —
linux-hwe-5.13 — —
linux-hwe-5.15 — 5.15.0-136.147~20.04.1
linux-hwe-5.19 — —
linux-hwe-5.4 — 5.4.0-220.240~18.04.1
linux-hwe-5.8 — —
linux-hwe-6.2 — —
linux-hwe-6.5 — —
linux-hwe-6.8 — 6.8.0-57.59~22.04.1
linux-hwe-edge — —
linux-ibm — 6.8.0-1022.22
linux-ibm-5.15 — 5.15.0-1074.77~20.04.1
linux-ibm-5.4 — 5.4.0-1095.100~18.04.1
linux-ibm-6.8 — 6.8.0-1023.23~22.04.1
linux-intel-5.13 — —
linux-intel-iot-realtime — 5.15.0-1073.75
linux-intel-iotg — 5.15.0-1075.81
linux-intel-iotg-5.15 — 5.15.0-1077.83~20.04.1
linux-iot — 5.4.0-1053.56
linux-kvm — 5.15.0-1076.81
linux-lowlatency — 6.8.0-54.56.1
linux-lowlatency-hwe-5.15 — 5.15.0-135.146~20.04.1
linux-lowlatency-hwe-5.19 — —
linux-lowlatency-hwe-6.2 — —
linux-lowlatency-hwe-6.5 — —
linux-lowlatency-hwe-6.8 — 6.8.0-54.56.1~22.04.1
linux-lts-xenial — 4.4.0-271.305~14.04.1
linux-nvidia — 6.8.0-1022.25
linux-nvidia-6.11 — 6.11.0-1007.7
linux-nvidia-6.2 — —
linux-nvidia-6.5 — —
linux-nvidia-6.8 — 6.8.0-1022.25~22.04.2
linux-nvidia-lowlatency — 6.8.0-1022.25.2
linux-nvidia-tegra — 5.15.0-1033.33
linux-nvidia-tegra-5.15 — 5.15.0-1039.39~20.04.1
linux-nvidia-tegra-igx — 5.15.0-1021.21
linux-oem — —
linux-oem-5.10 — —
linux-oem-5.13 — —
linux-oem-5.14 — —
linux-oem-5.17 — —
linux-oem-5.6 — —
linux-oem-6.0 — —
linux-oem-6.1 — —
linux-oem-6.11 — 6.11.0-1015.15
linux-oem-6.5 — —
linux-oem-6.8 — 6.8.0-1024.24
linux-oracle — 6.8.0-1020.21
linux-oracle-5.0 — —
linux-oracle-5.11 — —
linux-oracle-5.13 — —
linux-oracle-5.15 — 5.15.0-1077.83~20.04.1
linux-oracle-5.3 — —
linux-oracle-5.4 — 5.4.0-1148.158~18.04.1
linux-oracle-5.8 — —
linux-oracle-6.5 — —
linux-oracle-6.8 — 6.8.0-1020.21~22.04.1
linux-raspi — 6.8.0-1019.23
linux-raspi-5.4 — 5.4.0-1132.145~18.04.1
linux-raspi-realtime — 6.8.0-2018.19
linux-raspi2 — —
linux-realtime — 6.8.1-1016.17
linux-realtime-6.8 — 6.8.1-1016.17~22.04.1
linux-riscv — 6.8.0-53.55.1
linux-riscv-5.11 — —
linux-riscv-5.15 — 5.15.0-1075.79~20.04.1
linux-riscv-5.19 — —
linux-riscv-5.8 — —
linux-riscv-6.5 — —
linux-riscv-6.8 — 6.8.0-53.55.1~22.04.1
linux-starfive-5.19 — —
linux-starfive-6.2 — —
linux-starfive-6.5 — —
linux-xilinx — 6.8.0-1017.18
linux-xilinx-zynqmp — 5.15.0-1044.48

References

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