UBUNTU-CVE-2023-52434: High severity ubuntu/linux-hwe-edge vulnerability

Q: Who is exposed to this issue?

Systems using the affected Ubuntu kernel packages are exposed when they act as SMB clients and process create contexts from an SMB server. The listed packages are linux-aws-fips, linux-azure-fips, linux-fips, linux-gcp-fips, linux-azure, linux-gcp, linux-raspi, and linux-hwe-edge.

Q: What does an attacker need to exploit it?

An attacker needs to provide invalid SMB create contexts to a vulnerable SMB client. The fault occurs while mount.cifs is processing server-supplied create contexts, so the attacker-controlled component is the SMB server response.

Q: What is the likely impact of successful exploitation?

Malformed create contexts can trigger an out-of-bounds access in the kernel SMB client parser and cause a kernel page fault/oops. The supplied severity vector indicates an availability impact, consistent with a client system crash or disruption.

Published Feb 20, 2024

Updated

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential OOBs in smb2parsecontexts() Validate offsets and lengths before dereferencing create contexts in smb2parsecontexts(). This fixes following oops when accessing invalid create contexts from server: BUG: unable to handle page fault for address: ffff8881178d8cc3 #PF: supervisor read access in kernel mode #PF: errorcode(0x0000) - not-present page PGD 4a01067 P4D 4a01067 PUD 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 3 PID: 1736 Comm: mount.cifs Not tainted 6.7.0-rc4 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014 RIP: 0010:smb2parsecontexts+0xa0/0x3a0 [cifs] Code: f8 10 75 13 48 b8 93 ad 25 50 9c b4 11 e7 49 39 06 0f 84 d2 00 00 00 8b 45 00 85 c0 74 61 41 29 c5 48 01 c5 41 83 fd 0f 76 55 <0f> b7 7d 04 0f b7 45 06 4c 8d 74 3d 00 66 83 f8 04 75 bc ba 04 00 RSP: 0018:ffffc900007939e0 EFLAGS: 00010216 RAX: ffffc90000793c78 RBX: ffff8880180cc000 RCX: ffffc90000793c90 RDX: ffffc90000793cc0 RSI: ffff8880178d8cc0 RDI: ffff8880180cc000 RBP: ffff8881178d8cbf R08: ffffc90000793c22 R09: 0000000000000000 R10: ffff8880180cc000 R11: 0000000000000024 R12: 0000000000000000 R13: 0000000000000020 R14: 0000000000000000 R15: ffffc90000793c22 FS: 00007f873753cbc0(0000) GS:ffff88806bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8881178d8cc3 CR3: 00000000181ca000 CR4: 0000000000750ef0 PKRU: 55555554 Call Trace: <TASK> ? die+0x23/0x70 ? pagefaultoops+0x181/0x480 ? searchmoduleextables+0x19/0x60 ? srsoaliasreturnthunk+0x5/0xfbef5 ? excpagefault+0x1b6/0x1c0 ? asmexcpagefault+0x26/0x30 ? smb2parsecontexts+0xa0/0x3a0 [cifs] SMB2open+0x38d/0x5f0 [cifs] ? smb2ispathaccessible+0x138/0x260 [cifs] smb2ispathaccessible+0x138/0x260 [cifs] cifsispathremote+0x8d/0x230 [cifs] cifsmount+0x7e/0x350 [cifs] cifssmb3domount+0x128/0x780 [cifs] smb3gettree+0xd9/0x290 [cifs] vfsgettree+0x2c/0x100 ? capable+0x37/0x70 pathmount+0x2d7/0xb80 ? srsoaliasreturnthunk+0x5/0xfbef5 ? rawspinunlockirqrestore+0x44/0x60 x64sysmount+0x11a/0x150 dosyscall64+0x47/0xf0 entrySYSCALL64afterhwframe+0x6f/0x77 RIP: 0033:0x7f8737657b1e

Affected Software

143 affected componentsFixes available

ubuntu/linux-hwe-edge*

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4<5.4.0-1130.140~18.04.1

5.4.0-1130.140~18.04.1

ubuntu/linux-azure*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4<5.4.0-1135.142~18.04.1

5.4.0-1135.142~18.04.1

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-5.3*

ubuntu/linux-gcp-5.4<5.4.0-1134.143~18.04.1

5.4.0-1134.143~18.04.1

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-5.4<5.4.0-192.212~18.04.1

5.4.0-192.212~18.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-ibm-5.4<5.4.0-1077.82~18.04.1

5.4.0-1077.82~18.04.1

ubuntu/linux-oem*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-oracle-5.4<5.4.0-1129.138~18.04.1

5.4.0-1129.138~18.04.1

ubuntu/linux-raspi-5.4<5.4.0-1114.126~18.04.1

5.4.0-1114.126~18.04.1

ubuntu/linux<5.4.0-192.212

5.4.0-192.212

ubuntu/linux-aws<5.4.0-1130.140

5.4.0-1130.140

ubuntu/linux-aws-5.15<5.15.0-1063.69~20.04.1

5.15.0-1063.69~20.04.1

ubuntu/linux-azure<5.4.0-1135.142

5.4.0-1135.142

ubuntu/linux-azure-5.15<5.15.0-1078.87~20.04.1

5.15.0-1078.87~20.04.1

ubuntu/linux-bluefield<5.4.0-1090.97

5.4.0-1090.97

ubuntu/linux-gcp<5.4.0-1134.143

5.4.0-1134.143

ubuntu/linux-gcp-5.15<5.15.0-1062.70~20.04.1

5.15.0-1062.70~20.04.1

ubuntu/linux-gkeop<5.4.0-1097.101

5.4.0-1097.101

ubuntu/linux-gkeop-5.15<5.15.0-1046.53~20.04.1

5.15.0-1046.53~20.04.1

ubuntu/linux-hwe-5.15<5.15.0-113.123~20.04.1

5.15.0-113.123~20.04.1

ubuntu/linux-ibm<5.4.0-1077.82

5.4.0-1077.82

ubuntu/linux-ibm-5.15<5.15.0-1057.60~20.04.1

5.15.0-1057.60~20.04.1

ubuntu/linux-intel-iotg-5.15<5.15.0-1058.64~20.04.1

5.15.0-1058.64~20.04.1

ubuntu/linux-iot<5.4.0-1042.43

5.4.0-1042.43

ubuntu/linux-kvm<5.4.0-1118.125

5.4.0-1118.125

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-110.120~20.04.1

5.15.0-110.120~20.04.1

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1027.27~20.04.1

5.15.0-1027.27~20.04.1

ubuntu/linux-oracle<5.4.0-1129.138

5.4.0-1129.138

ubuntu/linux-oracle-5.15<5.15.0-1061.67~20.04.1

5.15.0-1061.67~20.04.1

ubuntu/linux-raspi<5.4.0-1114.126

5.4.0-1114.126

ubuntu/linux-riscv-5.15<5.15.0-1059.63~20.04.1

5.15.0-1059.63~20.04.1

ubuntu/linux-xilinx-zynqmp<5.4.0-1049.53

5.4.0-1049.53

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-aws-fips<5.4.0-1130.140+fips1

5.4.0-1130.140+fips1

ubuntu/linux-azure-fips<5.4.0-1135.142+fips1

5.4.0-1135.142+fips1

ubuntu/linux-fips<5.4.0-1104.114

5.4.0-1104.114

ubuntu/linux-gcp-fips<5.4.0-1134.143+fips1

5.4.0-1134.143+fips1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.15.0-112.122

5.15.0-112.122

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1063.69

5.15.0-1063.69

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5<6.5.0-1017.17~22.04.2

6.5.0-1017.17~22.04.2

ubuntu/linux-azure<5.15.0-1075.84

5.15.0-1075.84

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5<6.5.0-1018.19~22.04.2

6.5.0-1018.19~22.04.2

ubuntu/linux-azure-fde<5.15.0-1076.85.1

5.15.0-1076.85.1

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp<5.15.0-1062.70

5.15.0-1062.70

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5<6.5.0-1017.17~22.04.1

6.5.0-1017.17~22.04.1

ubuntu/linux-gke<5.15.0-1060.66

5.15.0-1060.66

ubuntu/linux-gkeop<5.15.0-1046.53

5.15.0-1046.53

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5<6.5.0-27.28~22.04.1

6.5.0-27.28~22.04.1

ubuntu/linux-ibm<5.15.0-1056.59

5.15.0-1056.59

ubuntu/linux-intel-iotg<5.15.0-1058.64

5.15.0-1058.64

ubuntu/linux-kvm<5.15.0-1060.65

5.15.0-1060.65

ubuntu/linux-lowlatency<5.15.0-110.120

5.15.0-110.120

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5<6.5.0-27.28.1~22.04.1

6.5.0-27.28.1~22.04.1

ubuntu/linux-nvidia<5.15.0-1058.59

5.15.0-1058.59

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5<6.5.0-1014.14

6.5.0-1014.14

ubuntu/linux-nvidia-tegra<5.15.0-1026.26

5.15.0-1026.26

ubuntu/linux-nvidia-tegra-igx<5.15.0-1015.15

5.15.0-1015.15

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5<6.5.0-1019.20

6.5.0-1019.20

ubuntu/linux-oracle<5.15.0-1061.67

5.15.0-1061.67

ubuntu/linux-oracle-6.5<6.5.0-1020.20~22.04.1

6.5.0-1020.20~22.04.1

ubuntu/linux-raspi<5.15.0-1058.61

5.15.0-1058.61

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5<6.5.0-27.28.1~22.04.1

6.5.0-27.28.1~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5<6.5.0-1011.12~22.04.1

6.5.0-1011.12~22.04.1

ubuntu/linux-xilinx-zynqmp<5.15.0-1030.34

5.15.0-1030.34

ubuntu/linux-bluefield<5.15.0-1044.46

5.15.0-1044.46

ubuntu/linux-intel-iot-realtime<5.15.0-1056.58

5.15.0-1056.58

ubuntu/linux-realtime<5.15.0-1064.72

5.15.0-1064.72

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1063.69+fips1

5.15.0-1063.69+fips1

ubuntu/linux-azure-fips<5.15.0-1075.84+fips1

5.15.0-1075.84+fips1

ubuntu/linux-fips<5.15.0-111.121+fips1

5.15.0-111.121+fips1

ubuntu/linux-gcp-fips<5.15.0-1062.70+fips1

5.15.0-1062.70+fips1

ubuntu/linux-raspi<6.7.0-1001.1

6.7.0-1001.1

ubuntu/linux-raspi-realtime*

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1130.140~18.04.1
Upgrade
Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1135.142~18.04.1
Upgrade
Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1134.143~18.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-192.212~18.04.1
Upgrade
Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1077.82~18.04.1
Upgrade
Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1129.138~18.04.1
Upgrade
Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1114.126~18.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.4.0-192.212
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.4.0-1130.140
Upgrade
Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1063.69~20.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.4.0-1135.142
Upgrade
Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1078.87~20.04.1
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.4.0-1090.97
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.4.0-1134.143
Upgrade
Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1062.70~20.04.1
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.4.0-1097.101
Upgrade
Upgrade ubuntu/linux-gkeop-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1046.53~20.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-113.123~20.04.1
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.4.0-1077.82
Upgrade
Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1057.60~20.04.1
Upgrade
Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1058.64~20.04.1
Upgrade
Upgrade ubuntu/linux-iot to a version that resolves this vulnerability.
Fixed in 5.4.0-1042.43
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.4.0-1118.125
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-110.120~20.04.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1027.27~20.04.1
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.4.0-1129.138
Upgrade
Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1061.67~20.04.1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.4.0-1114.126
Upgrade
Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1059.63~20.04.1
Upgrade
Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.4.0-1049.53
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1130.140+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1135.142+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1104.114
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1134.143+fips1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.15.0-112.122
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.15.0-1063.69
Upgrade
Upgrade ubuntu/linux-aws-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1017.17~22.04.2
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.15.0-1075.84
Upgrade
Upgrade ubuntu/linux-azure-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1018.19~22.04.2
Upgrade
Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.
Fixed in 5.15.0-1076.85.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.15.0-1062.70
Upgrade
Upgrade ubuntu/linux-gcp-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1017.17~22.04.1
Upgrade
Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.
Fixed in 5.15.0-1060.66
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.15.0-1046.53
Upgrade
Upgrade ubuntu/linux-hwe-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-27.28~22.04.1
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.15.0-1056.59
Upgrade
Upgrade ubuntu/linux-intel-iotg to a version that resolves this vulnerability.
Fixed in 5.15.0-1058.64
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.15.0-1060.65
Upgrade
Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 5.15.0-110.120
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-27.28.1~22.04.1
Upgrade
Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 5.15.0-1058.59
Upgrade
Upgrade ubuntu/linux-nvidia-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1014.14
Upgrade
Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.
Fixed in 5.15.0-1026.26
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-igx to a version that resolves this vulnerability.
Fixed in 5.15.0-1015.15
Upgrade
Upgrade ubuntu/linux-oem-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1019.20
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.15.0-1061.67
Upgrade
Upgrade ubuntu/linux-oracle-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1020.20~22.04.1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.15.0-1058.61
Upgrade
Upgrade ubuntu/linux-riscv-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-27.28.1~22.04.1
Upgrade
Upgrade ubuntu/linux-starfive-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1011.12~22.04.1
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 5.15.0-1044.46
Upgrade
Upgrade ubuntu/linux-intel-iot-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1056.58
Upgrade
Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1064.72
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1063.69+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1075.84+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-111.121+fips1
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1062.70+fips1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 6.7.0-1001.1

Event History

Feb 20, 2024

CVE Published

via OSV·06:15 PM

Data Sourced

via OSV·06:15 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

Who is exposed to this issue?

Systems using the affected Ubuntu kernel packages are exposed when they act as SMB clients and process create contexts from an SMB server. The listed packages are linux-aws-fips, linux-azure-fips, linux-fips, linux-gcp-fips, linux-azure, linux-gcp, linux-raspi, and linux-hwe-edge.

What does an attacker need to exploit it?

An attacker needs to provide invalid SMB create contexts to a vulnerable SMB client. The fault occurs while mount.cifs is processing server-supplied create contexts, so the attacker-controlled component is the SMB server response.

What is the likely impact of successful exploitation?

Malformed create contexts can trigger an out-of-bounds access in the kernel SMB client parser and cause a kernel page fault/oops. The supplied severity vector indicates an availability impact, consistent with a client system crash or disruption.

UBUNTU-CVE-2023-52434: High severity ubuntu/linux-hwe-edge vulnerability

Affected Software

Remediation

Event History

Frequently Asked Questions

Who is exposed to this issue?

What does an attacker need to exploit it?

What is the likely impact of successful exploitation?

Company

Resources

Contact

Frequently Asked Questions

Who is exposed to this issue?

What does an attacker need to exploit it?

What is the likely impact of successful exploitation?