UBUNTU-CVE-2024-50162: Null Pointer Dereference

Q: Which systems are exposed to this issue?

Systems using an affected Ubuntu Linux kernel and BPF_MAP_TYPE_DEVMAP-based redirects are exposed when a BPF program executed after the redirect accesses ingress_ifindex. The listed Ubuntu kernel packages include linux, linux-realtime, linux-azure, linux-gcp, linux-gke, linux-riscv, linux-fips, and linux-azure-fde.

Q: What is required to trigger the failure?

A BPF program must redirect a packet through a DEVMAP-type map, followed by a program running after the redirect that accesses ingress_ifindex. In the vulnerable behavior, the receive-queue context is not provided after redirect, causing that access to dereference a NULL pointer.

Q: What is the practical impact of exploitation?

The described outcome is a kernel NULL pointer dereference and kernel oops. The supplied vector indicates local attack conditions with high privileges required and an availability impact.

Published Nov 7, 2024

Updated

In the Linux kernel, the following vulnerability has been resolved: bpf: devmap: provide rxq after redirect rxq contains a pointer to the device from where the redirect happened. Currently, the BPF program that was executed after a redirect via BPFMAPTYPEDEVMAP does not have it set. This is particularly bad since accessing ingressifindex, e.g. SEC("xdp") int prog(struct xdpmd pkt) { return bpfredirectmap(&devredirectmap, 0, 0); } SEC("xdp/devmap") int progafterredirect(struct xdpmd pkt) { bpfprintk("ifindex %i", pkt->ingressifindex); return XDPPASS; } depends on access to rxq, so a NULL pointer gets dereferenced: <1>[ 574.475170] BUG: kernel NULL pointer dereference, address: 0000000000000000 <1>[ 574.475188] #PF: supervisor read access in kernel mode <1>[ 574.475194] #PF: errorcode(0x0000) - not-present page <6>[ 574.475199] PGD 0 P4D 0 <4>[ 574.475207] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI <4>[ 574.475217] CPU: 4 UID: 0 PID: 217 Comm: kworker/4:1 Not tainted 6.11.0-rc5-reduced-00859-g780801200300 #23 <4>[ 574.475226] Hardware name: Intel(R) Client Systems NUC13ANHi7/NUC13ANBi7, BIOS ANRPL357.0026.2023.0314.1458 03/14/2023 <4>[ 574.475231] Workqueue: mld mldifcwork <4>[ 574.475247] RIP: 0010:bpfprog5e13354d9cf5018aprogafterredirect+0x17/0x3c <4>[ 574.475257] Code: cc cc cc cc cc cc cc 80 00 00 00 cc cc cc cc cc cc cc cc f3 0f 1e fa 0f 1f 44 00 00 66 90 55 48 89 e5 f3 0f 1e fa 48 8b 57 20 <48> 8b 52 00 8b 92 e0 00 00 00 48 bf f8 a6 d5 c4 5d a0 ff ff be 0b <4>[ 574.475263] RSP: 0018:ffffa62440280c98 EFLAGS: 00010206 <4>[ 574.475269] RAX: ffffa62440280cd8 RBX: 0000000000000001 RCX: 0000000000000000 <4>[ 574.475274] RDX: 0000000000000000 RSI: ffffa62440549048 RDI: ffffa62440280ce0 <4>[ 574.475278] RBP: ffffa62440280c98 R08: 0000000000000002 R09: 0000000000000001 <4>[ 574.475281] R10: ffffa05dc8b98000 R11: ffffa05f577fca40 R12: ffffa05dcab24000 <4>[ 574.475285] R13: ffffa62440280ce0 R14: ffffa62440549048 R15: ffffa62440549000 <4>[ 574.475289] FS: 0000000000000000(0000) GS:ffffa05f4f700000(0000) knlGS:0000000000000000 <4>[ 574.475294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 <4>[ 574.475298] CR2: 0000000000000000 CR3: 000000025522e000 CR4: 0000000000f50ef0 <4>[ 574.475303] PKRU: 55555554 <4>[ 574.475306] Call Trace: <4>[ 574.475313] <IRQ> <4>[ 574.475318] ? die+0x23/0x70 <4>[ 574.475329] ? pagefaultoops+0x180/0x4c0 <4>[ 574.475339] ? skbppcowdata+0x34c/0x490 <4>[ 574.475346] ? kmemcachefree+0x257/0x280 <4>[ 574.475357] ? excpagefault+0x67/0x150 <4>[ 574.475368] ? asmexcpagefault+0x26/0x30 <4>[ 574.475381] ? bpfprog5e13354d9cf5018aprogafterredirect+0x17/0x3c <4>[ 574.475386] bqxmitall+0x158/0x420 <4>[ 574.475397] devflush+0x30/0x90 <4>[ 574.475407] vethpoll+0x216/0x250 [veth] <4>[ 574.475421] napipoll+0x28/0x1c0 <4>[ 574.475430] netrxaction+0x32d/0x3a0 <4>[ 574.475441] handlesoftirqs+0xcb/0x2c0 <4>[ 574.475451] dosoftirq+0x40/0x60 <4>[ 574.475458] </IRQ> <4>[ 574.475461] <TASK> <4>[ 574.475464] localbhenableip+0x66/0x70 <4>[ 574.475471] devqueuexmit+0x268/0xe40 <4>[ 574.475480] ? selinuxippostroute+0x213/0x420 <4>[ 574.475491] ? allocskbwithfrags+0x4a/0x1d0 <4>[ 574.475502] ip6finishoutput2+0x2be/0x640 <4>[ 574.475512] ? nfhookslow+0x42/0xf0 <4>[ 574.475521] ip6finishoutput+0x194/0x300 <4>[ 574.475529] ? pfxip6finishoutput+0x10/0x10 <4>[ 574.475538] mldsendpack+0x17c/0x240 <4>[ 574.475548] mldifcwork+0x192/0x410 <4>[ 574.475557] processonework+0x15d/0x380 <4>[ 574.475566] workerthread+0x29d/0x3a0 <4>[ 574.475573] ? pfxworkerthread+0x10/0x10 <4>[ 574.475580] ? pfxworkerthread+0x10/0x10 <4>[ 574.475587] kthread+0xcd/0x100 <4>[ 574.475597] ? pfxkthread+0x10/0x10 <4>[ 574.475606] retfromfork+0x31/0x50 <4>[ 574.475615] ? pfxkthread+0x10/0x10 <4>[ 574.475623] retfromforkasm+0x1a/0x ---truncated---

Affected Software

148 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<5.15.0-1080.87~20.04.1

5.15.0-1080.87~20.04.1

ubuntu/linux-azure-5.15<5.15.0-1081.90~20.04.1

5.15.0-1081.90~20.04.1

ubuntu/linux-gcp-5.15<5.15.0-1077.86~20.04.1

5.15.0-1077.86~20.04.1

ubuntu/linux-hwe-5.15<5.15.0-134.145~20.04.1

5.15.0-134.145~20.04.1

ubuntu/linux-ibm-5.15<5.15.0-1074.77~20.04.1

5.15.0-1074.77~20.04.1

ubuntu/linux-intel-iotg-5.15<5.15.0-1073.79~20.04.2

5.15.0-1073.79~20.04.2

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-133.143~20.04.1

5.15.0-133.143~20.04.1

ubuntu/linux-oracle-5.15<5.15.0-1075.81~20.04.1

5.15.0-1075.81~20.04.1

ubuntu/linux-riscv-5.15<5.15.0-1073.77~20.04.1

5.15.0-1073.77~20.04.1

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-gkeop-5.15*

ubuntu/linux-hwe-5.11*

ubuntu/linux-hwe-5.13*

ubuntu/linux-hwe-5.8*

ubuntu/linux-intel-5.13*

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1039.39~20.04.1

5.15.0-1039.39~20.04.1

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<5.15.0-133.144

5.15.0-133.144

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1078.85

5.15.0-1078.85

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-aws-6.8<6.8.0-1027.29~22.04.1

6.8.0-1027.29~22.04.1

ubuntu/linux-azure<5.15.0-1081.90

5.15.0-1081.90

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-6.8<6.8.0-1027.32~22.04.1

6.8.0-1027.32~22.04.1

ubuntu/linux-azure-fde<5.15.0-1081.90.1

5.15.0-1081.90.1

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp<5.15.0-1077.86

5.15.0-1077.86

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gcp-6.8<6.8.0-1028.30~22.04.1

6.8.0-1028.30~22.04.1

ubuntu/linux-gke<5.15.0-1075.81

5.15.0-1075.81

ubuntu/linux-gkeop<5.15.0-1060.68

5.15.0-1060.68

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-hwe-6.8<6.8.0-58.60~22.04.1

6.8.0-58.60~22.04.1

ubuntu/linux-ibm<5.15.0-1070.73

5.15.0-1070.73

ubuntu/linux-ibm-6.8<6.8.0-1024.24~22.04.1

6.8.0-1024.24~22.04.1

ubuntu/linux-intel-iotg<5.15.0-1073.79

5.15.0-1073.79

ubuntu/linux-kvm<5.15.0-1076.81

5.15.0-1076.81

ubuntu/linux-lowlatency<5.15.0-133.143

5.15.0-133.143

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-lowlatency-hwe-6.8<6.8.0-58.60.1~22.04.1

6.8.0-58.60.1~22.04.1

ubuntu/linux-nvidia<5.15.0-1072.73

5.15.0-1072.73

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-nvidia-6.8<6.8.0-1026.29~22.04.1

6.8.0-1026.29~22.04.1

ubuntu/linux-nvidia-tegra<5.15.0-1033.33

5.15.0-1033.33

ubuntu/linux-nvidia-tegra-igx<5.15.0-1021.21

5.15.0-1021.21

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1075.81

5.15.0-1075.81

ubuntu/linux-oracle-6.5*

ubuntu/linux-oracle-6.8<6.8.0-1024.25~22.04.1

6.8.0-1024.25~22.04.1

ubuntu/linux-raspi<5.15.0-1072.75

5.15.0-1072.75

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-riscv-6.8<6.8.0-58.60.1~22.04.1

6.8.0-58.60.1~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-xilinx-zynqmp<5.15.0-1044.48

5.15.0-1044.48

ubuntu/linux-bluefield<5.15.0-1060.62

5.15.0-1060.62

ubuntu/linux-intel-iot-realtime<5.15.0-1071.73

5.15.0-1071.73

ubuntu/linux-realtime<5.15.0-1078.86

5.15.0-1078.86

ubuntu/linux-realtime-6.8<6.8.1-1020.21~22.04.1

6.8.1-1020.21~22.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1078.85+fips1

5.15.0-1078.85+fips1

ubuntu/linux-azure-fips<5.15.0-1080.89+fips1

5.15.0-1080.89+fips1

ubuntu/linux-fips<5.15.0-133.144+fips1

5.15.0-133.144+fips1

ubuntu/linux-gcp-fips<5.15.0-1077.86+fips1

5.15.0-1077.86+fips1

ubuntu/linux<6.8.0-58.60

6.8.0-58.60

ubuntu/linux-aws<6.8.0-1027.29

6.8.0-1027.29

ubuntu/linux-azure<6.8.0-1027.32

6.8.0-1027.32

ubuntu/linux-azure-6.11<6.11.0-1012.12~24.04.1

6.11.0-1012.12~24.04.1

ubuntu/linux-azure-nvidia<6.8.0-1014.15

6.8.0-1014.15

ubuntu/linux-gcp<6.8.0-1028.30

6.8.0-1028.30

ubuntu/linux-gcp-6.11<6.11.0-1011.11~24.04.1

6.11.0-1011.11~24.04.1

ubuntu/linux-gke<6.8.0-1023.27

6.8.0-1023.27

ubuntu/linux-gkeop<6.8.0-1010.12

6.8.0-1010.12

ubuntu/linux-ibm<6.8.0-1024.24

6.8.0-1024.24

ubuntu/linux-lowlatency<6.8.0-58.60.1

6.8.0-58.60.1

ubuntu/linux-nvidia<6.8.0-1026.29

6.8.0-1026.29

ubuntu/linux-nvidia-6.11<6.11.0-1007.7

6.11.0-1007.7

ubuntu/linux-nvidia-lowlatency<6.8.0-1026.29.1

6.8.0-1026.29.1

ubuntu/linux-nvidia-tegra<6.8.0-1008.8

6.8.0-1008.8

ubuntu/linux-oem-6.11<6.11.0-1015.15

6.11.0-1015.15

ubuntu/linux-oem-6.8<6.8.0-1026.26

6.8.0-1026.26

ubuntu/linux-oracle<6.8.0-1024.25

6.8.0-1024.25

ubuntu/linux-raspi<6.8.0-1028.32

6.8.0-1028.32

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv<6.8.0-58.60.1

6.8.0-58.60.1

ubuntu/linux-xilinx<6.8.0-1017.18

6.8.0-1017.18

ubuntu/linux-raspi-realtime<6.8.0-2023.24

6.8.0-2023.24

ubuntu/linux-realtime<6.8.1-1020.21

6.8.1-1020.21

ubuntu/linux-fips<6.8.0-78.78+fips1

6.8.0-78.78+fips1

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 5.15.0-1080.87~20.04.1
Upgrade
Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1081.90~20.04.1
Upgrade
Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1077.86~20.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-134.145~20.04.1
Upgrade
Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1074.77~20.04.1
Upgrade
Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1073.79~20.04.2
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-133.143~20.04.1
Upgrade
Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1075.81~20.04.1
Upgrade
Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1073.77~20.04.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1039.39~20.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.15.0-133.144
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.15.0-1078.85
Upgrade
Upgrade ubuntu/linux-aws-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1027.29~22.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.15.0-1081.90
Upgrade
Upgrade ubuntu/linux-azure-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1027.32~22.04.1
Upgrade
Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.
Fixed in 5.15.0-1081.90.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.15.0-1077.86
Upgrade
Upgrade ubuntu/linux-gcp-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1028.30~22.04.1
Upgrade
Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.
Fixed in 5.15.0-1075.81
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.15.0-1060.68
Upgrade
Upgrade ubuntu/linux-hwe-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-58.60~22.04.1
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.15.0-1070.73
Upgrade
Upgrade ubuntu/linux-ibm-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1024.24~22.04.1
Upgrade
Upgrade ubuntu/linux-intel-iotg to a version that resolves this vulnerability.
Fixed in 5.15.0-1073.79
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.15.0-1076.81
Upgrade
Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 5.15.0-133.143
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-58.60.1~22.04.1
Upgrade
Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 5.15.0-1072.73
Upgrade
Upgrade ubuntu/linux-nvidia-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1026.29~22.04.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.
Fixed in 5.15.0-1033.33
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-igx to a version that resolves this vulnerability.
Fixed in 5.15.0-1021.21
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.15.0-1075.81
Upgrade
Upgrade ubuntu/linux-oracle-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1024.25~22.04.1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.15.0-1072.75
Upgrade
Upgrade ubuntu/linux-riscv-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-58.60.1~22.04.1
Upgrade
Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.15.0-1044.48
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.15.0-1060.62
Upgrade
Upgrade ubuntu/linux-intel-iot-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1071.73
Upgrade
Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1078.86
Upgrade
Upgrade ubuntu/linux-realtime-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.1-1020.21~22.04.1
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1078.85+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1080.89+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-133.144+fips1
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1077.86+fips1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 6.8.0-58.60
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 6.8.0-1027.29
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 6.8.0-1027.32
Upgrade
Upgrade ubuntu/linux-azure-6.11 to a version that resolves this vulnerability.
Fixed in 6.11.0-1012.12~24.04.1
Upgrade
Upgrade ubuntu/linux-azure-nvidia to a version that resolves this vulnerability.
Fixed in 6.8.0-1014.15
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Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 6.8.0-1028.30
Upgrade
Upgrade ubuntu/linux-gcp-6.11 to a version that resolves this vulnerability.
Fixed in 6.11.0-1011.11~24.04.1
Upgrade
Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.
Fixed in 6.8.0-1023.27
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Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 6.8.0-1010.12
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Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 6.8.0-1024.24
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Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 6.8.0-58.60.1
Upgrade
Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 6.8.0-1026.29
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Upgrade ubuntu/linux-nvidia-6.11 to a version that resolves this vulnerability.
Fixed in 6.11.0-1007.7
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Upgrade ubuntu/linux-nvidia-lowlatency to a version that resolves this vulnerability.
Fixed in 6.8.0-1026.29.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.
Fixed in 6.8.0-1008.8
Upgrade
Upgrade ubuntu/linux-oem-6.11 to a version that resolves this vulnerability.
Fixed in 6.11.0-1015.15
Upgrade
Upgrade ubuntu/linux-oem-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1026.26
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 6.8.0-1024.25
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Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 6.8.0-1028.32
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Upgrade ubuntu/linux-riscv to a version that resolves this vulnerability.
Fixed in 6.8.0-58.60.1
Upgrade
Upgrade ubuntu/linux-xilinx to a version that resolves this vulnerability.
Fixed in 6.8.0-1017.18
Upgrade
Upgrade ubuntu/linux-raspi-realtime to a version that resolves this vulnerability.
Fixed in 6.8.0-2023.24
Upgrade
Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 6.8.1-1020.21
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Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 6.8.0-78.78+fips1

Event History

Nov 7, 2024

CVE Published

via OSV·10:15 AM

Data Sourced

via OSV·10:15 AM

DescriptionSeverityAffected Software

Frequently Asked Questions

Which systems are exposed to this issue?

Systems using an affected Ubuntu Linux kernel and BPF_MAP_TYPE_DEVMAP-based redirects are exposed when a BPF program executed after the redirect accesses ingress_ifindex. The listed Ubuntu kernel packages include linux, linux-realtime, linux-azure, linux-gcp, linux-gke, linux-riscv, linux-fips, and linux-azure-fde.

What is required to trigger the failure?

A BPF program must redirect a packet through a DEVMAP-type map, followed by a program running after the redirect that accesses ingress_ifindex. In the vulnerable behavior, the receive-queue context is not provided after redirect, causing that access to dereference a NULL pointer.

What is the practical impact of exploitation?

The described outcome is a kernel NULL pointer dereference and kernel oops. The supplied vector indicates local attack conditions with high privileges required and an availability impact.

UBUNTU-CVE-2024-50162: Null Pointer Dereference

Affected Software

Remediation

Event History

Frequently Asked Questions

Which systems are exposed to this issue?

What is required to trigger the failure?

What is the practical impact of exploitation?

Company

Resources

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Frequently Asked Questions

Which systems are exposed to this issue?

What is required to trigger the failure?

What is the practical impact of exploitation?