UBUNTU-CVE-2024-26591: Null Pointer Dereference

Q: What access does an attacker need to trigger the crash?

The vulnerability requires high privileges and local access. Exploitation involves using the bpf system call to load a raw tracepoint program, load an fentry program targeting it, and repeatedly create tracing links without supplying a target_fd.

Q: What is the likely impact of successful exploitation?

The affected kernel can dereference a NULL pointer during BPF tracing-program attachment, causing a kernel crash. The provided vector indicates availability impact only, with no stated confidentiality or integrity impact.

Q: Which Ubuntu kernel packages are identified as affected?

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

Q: What behavior changes after the fix?

When the program was loaded with an attach_prog_fd but no target can be identified during tracing-link creation, the kernel returns -EINVAL instead of proceeding to the NULL-pointer dereference.

Published Feb 22, 2024

Updated

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix re-attachment branch in bpftracingprogattach The following case can cause a crash due to missing attachbtf: 1) load rawtp program 2) load fentry program with rawtp as targetfd 3) create tracing link for fentry program with targetfd = 0 4) repeat 3 In the end we have: - prog->aux->dsttrampoline == NULL - tgtprog == NULL (because we did not provide targetfd to linkcreate) - prog->aux->attachbtf == NULL (the program was loaded with attachprogfd=X) - the program was loaded for tgtprog but we have no way to find out which one BUG: kernel NULL pointer dereference, address: 0000000000000058 Call Trace: <TASK> ? die+0x20/0x70 ? pagefaultoops+0x15b/0x430 ? fixupexception+0x22/0x330 ? excpagefault+0x6f/0x170 ? asmexcpagefault+0x22/0x30 ? bpftracingprogattach+0x279/0x560 ? btfobjid+0x5/0x10 bpftracingprogattach+0x439/0x560 sysbpf+0x1cf4/0x2de0 x64sysbpf+0x1c/0x30 dosyscall64+0x41/0xf0 entrySYSCALL64afterhwframe+0x6e/0x76 Return -EINVAL in this situation.

Affected Software

114 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-oem*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-aws-5.15<5.15.0-1057.63~20.04.1

5.15.0-1057.63~20.04.1

ubuntu/linux-azure-5.15<5.15.0-1060.69~20.04.1

5.15.0-1060.69~20.04.1

ubuntu/linux-gcp-5.15<5.15.0-1055.63~20.04.1

5.15.0-1055.63~20.04.1

ubuntu/linux-gkeop-5.15<5.15.0-1040.46~20.04.1

5.15.0-1040.46~20.04.1

ubuntu/linux-hwe-5.15<5.15.0-102.112~20.04.1

5.15.0-102.112~20.04.1

ubuntu/linux-ibm-5.15<5.15.0-1050.53~20.04.1

5.15.0-1050.53~20.04.1

ubuntu/linux-intel-iotg-5.15<5.15.0-1052.58~20.04.1

5.15.0-1052.58~20.04.1

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-102.112~20.04.1

5.15.0-102.112~20.04.1

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1025.25~20.04.1

5.15.0-1025.25~20.04.1

ubuntu/linux-oracle-5.15<5.15.0-1055.61~20.04.1

5.15.0-1055.61~20.04.1

ubuntu/linux-riscv-5.15<5.15.0-1053.57~20.04.1

5.15.0-1053.57~20.04.1

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.8*

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.8*

ubuntu/linux-gke*

ubuntu/linux-gke-5.15*

ubuntu/linux-hwe-5.11*

ubuntu/linux-hwe-5.13*

ubuntu/linux-hwe-5.8*

ubuntu/linux-intel-5.13*

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-5.8*

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.8*

ubuntu/linux<5.15.0-102.112

5.15.0-102.112

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1057.63

5.15.0-1057.63

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5<6.5.0-1018.18~22.04.1

6.5.0-1018.18~22.04.1

ubuntu/linux-azure<5.15.0-1060.69

5.15.0-1060.69

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5<6.5.0-1019.20~22.04.1

6.5.0-1019.20~22.04.1

ubuntu/linux-azure-fde<5.15.0-1060.69.1

5.15.0-1060.69.1

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp<5.15.0-1055.63

5.15.0-1055.63

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5<6.5.0-1018.18~22.04.1

6.5.0-1018.18~22.04.1

ubuntu/linux-gke<5.15.0-1054.59

5.15.0-1054.59

ubuntu/linux-gkeop<5.15.0-1040.46

5.15.0-1040.46

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5<6.5.0-28.29~22.04.1

6.5.0-28.29~22.04.1

ubuntu/linux-ibm<5.15.0-1050.53

5.15.0-1050.53

ubuntu/linux-intel-iotg<5.15.0-1052.58

5.15.0-1052.58

ubuntu/linux-kvm<5.15.0-1054.59

5.15.0-1054.59

ubuntu/linux-lowlatency<5.15.0-102.112

5.15.0-102.112

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5<6.5.0-28.29.1~22.04.1

6.5.0-28.29.1~22.04.1

ubuntu/linux-nvidia<5.15.0-1048.48

5.15.0-1048.48

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5<6.5.0-1015.15

6.5.0-1015.15

ubuntu/linux-nvidia-tegra<5.15.0-1025.25

5.15.0-1025.25

ubuntu/linux-nvidia-tegra-igx<5.15.0-1012.12

5.15.0-1012.12

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1<6.1.0-1035.35

6.1.0-1035.35

ubuntu/linux-oem-6.5<6.5.0-1020.21

6.5.0-1020.21

ubuntu/linux-oracle<5.15.0-1055.61

5.15.0-1055.61

ubuntu/linux-oracle-6.5<6.5.0-1021.21~22.04.1

6.5.0-1021.21~22.04.1

ubuntu/linux-raspi<5.15.0-1050.53

5.15.0-1050.53

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5<6.5.0-28.29.1~22.04.1

6.5.0-28.29.1~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5<6.5.0-1012.13~22.04.1

6.5.0-1012.13~22.04.1

ubuntu/linux-xilinx-zynqmp<5.15.0-1030.34

5.15.0-1030.34

ubuntu/linux-bluefield<5.15.0-1040.42

5.15.0-1040.42

ubuntu/linux-intel-iot-realtime<5.15.0-1050.52

5.15.0-1050.52

ubuntu/linux-realtime<5.15.0-1058.66

5.15.0-1058.66

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1057.63+fips1

5.15.0-1057.63+fips1

ubuntu/linux-azure-fips<5.15.0-1060.69+fips1

5.15.0-1060.69+fips1

ubuntu/linux-fips<5.15.0-102.112+fips1

5.15.0-102.112+fips1

ubuntu/linux-gcp-fips<5.15.0-1055.63+fips2

5.15.0-1055.63+fips2

ubuntu/linux-raspi-realtime<6.8.0-2001.1

6.8.0-2001.1

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1057.63~20.04.1
Upgrade
Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1060.69~20.04.1
Upgrade
Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1055.63~20.04.1
Upgrade
Upgrade ubuntu/linux-gkeop-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1040.46~20.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-102.112~20.04.1
Upgrade
Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1050.53~20.04.1
Upgrade
Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1052.58~20.04.1
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-102.112~20.04.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1025.25~20.04.1
Upgrade
Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1055.61~20.04.1
Upgrade
Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1053.57~20.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.15.0-102.112
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.15.0-1057.63
Upgrade
Upgrade ubuntu/linux-aws-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1018.18~22.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.15.0-1060.69
Upgrade
Upgrade ubuntu/linux-azure-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1019.20~22.04.1
Upgrade
Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.
Fixed in 5.15.0-1060.69.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.15.0-1055.63
Upgrade
Upgrade ubuntu/linux-gcp-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1018.18~22.04.1
Upgrade
Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.
Fixed in 5.15.0-1054.59
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.15.0-1040.46
Upgrade
Upgrade ubuntu/linux-hwe-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-28.29~22.04.1
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.15.0-1050.53
Upgrade
Upgrade ubuntu/linux-intel-iotg to a version that resolves this vulnerability.
Fixed in 5.15.0-1052.58
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.15.0-1054.59
Upgrade
Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 5.15.0-102.112
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-28.29.1~22.04.1
Upgrade
Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 5.15.0-1048.48
Upgrade
Upgrade ubuntu/linux-nvidia-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1015.15
Upgrade
Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.
Fixed in 5.15.0-1025.25
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-igx to a version that resolves this vulnerability.
Fixed in 5.15.0-1012.12
Upgrade
Upgrade ubuntu/linux-oem-6.1 to a version that resolves this vulnerability.
Fixed in 6.1.0-1035.35
Upgrade
Upgrade ubuntu/linux-oem-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1020.21
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.15.0-1055.61
Upgrade
Upgrade ubuntu/linux-oracle-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1021.21~22.04.1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.15.0-1050.53
Upgrade
Upgrade ubuntu/linux-riscv-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-28.29.1~22.04.1
Upgrade
Upgrade ubuntu/linux-starfive-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1012.13~22.04.1
Upgrade
Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.15.0-1030.34
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.15.0-1040.42
Upgrade
Upgrade ubuntu/linux-intel-iot-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1050.52
Upgrade
Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1058.66
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1057.63+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1060.69+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-102.112+fips1
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1055.63+fips2
Upgrade
Upgrade ubuntu/linux-raspi-realtime to a version that resolves this vulnerability.
Fixed in 6.8.0-2001.1

Event History

Feb 22, 2024

CVE Published

via OSV·05:15 PM

Data Sourced

via OSV·05:15 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

What access does an attacker need to trigger the crash?

The vulnerability requires high privileges and local access. Exploitation involves using the bpf system call to load a raw tracepoint program, load an fentry program targeting it, and repeatedly create tracing links without supplying a target_fd.

What is the likely impact of successful exploitation?

The affected kernel can dereference a NULL pointer during BPF tracing-program attachment, causing a kernel crash. The provided vector indicates availability impact only, with no stated confidentiality or integrity impact.

Which Ubuntu kernel packages are identified as affected?

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

What behavior changes after the fix?

When the program was loaded with an attach_prog_fd but no target can be identified during tracing-link creation, the kernel returns -EINVAL instead of proceeding to the NULL-pointer dereference.

UBUNTU-CVE-2024-26591: Null Pointer Dereference

Affected Software

Remediation

Event History

Frequently Asked Questions

What access does an attacker need to trigger the crash?

What is the likely impact of successful exploitation?

Which Ubuntu kernel packages are identified as affected?

What behavior changes after the fix?

Company

Resources

Contact

Frequently Asked Questions

What access does an attacker need to trigger the crash?

What is the likely impact of successful exploitation?

Which Ubuntu kernel packages are identified as affected?

What behavior changes after the fix?