What is the CVSS score of CVE-2024-26830?

CVE-2024-26830 has a CVSS 3.1 base score of 6.3 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H. EPSS exploitation probability: 0.2%.

Is there a patch available for CVE-2024-26830?

Yes, a patch is available for CVE-2024-26830. Update the affected software to the latest version immediately.

Linux CVE-2024-26830

MEDIUM

2024-04-17 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Information Disclosure Linux

6.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.3 MEDIUM

AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Apr 17, 2024 - 10:15 nvd

MEDIUM 6.3

DescriptionNVD

In the Linux kernel, the following vulnerability has been resolved:

i40e: Do not allow untrusted VF to remove administratively set MAC

Currently when PF administratively sets VF's MAC address and the VF is put down (VF tries to delete all MACs) then the MAC is removed from MAC filters and primary VF MAC is zeroed.

Do not allow untrusted VF to remove primary MAC when it was set administratively by PF.

Reproducer:

Create VF
Set VF interface up
Administratively set the VF's MAC
Put VF interface down

[root@host ~]

echo 1 > /sys/class/net/enp2s0f0/device/sriov_numvfs

[root@host ~]

ip link set enp2s0f0v0 up

[root@host ~]

ip link set enp2s0f0 vf 0 mac fe:6c:b5:da:c7:7d

[root@host ~]

ip link show enp2s0f0

23: enp2s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether 3c:ec:ef:b7:dd:04 brd ff:ff:ff:ff:ff:ff vf 0 link/ether fe:6c:b5:da:c7:7d brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state auto, trust off [root@host ~]

ip link set enp2s0f0v0 down

[root@host ~]

ip link show enp2s0f0

23: enp2s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether 3c:ec:ef:b7:dd:04 brd ff:ff:ff:ff:ff:ff vf 0 link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state auto, trust off

AnalysisAI

Technical ContextAI

In the Linux kernel, the following vulnerability has been resolved: i40e: Do not allow untrusted VF to remove administratively set MAC Currently when PF administratively sets VF's MAC address and the VF is put down (VF tries to delete all MACs) then the MAC is removed from MAC filters and primary VF MAC is zeroed. Do not allow untrusted VF to remove primary MAC when it was set administratively by PF. Reproducer: 1) Create VF 2) Set VF interface up 3) Administratively set the VF's MAC 4) Put VF interface down [root@host ~]

echo 1 > /sys/class/net/enp2s0f0/device/sriov_numvfs [root@host ~]

ip link set enp2s0f0v0 up [root@host ~]

ip link set enp2s0f0 vf 0 mac fe:6c:b5:da:c7:7d [root@host ~]

ip link show enp2s0f0 23: enp2s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether 3c:ec:ef:b7:dd:04 brd ff:ff:ff:ff:ff:ff vf 0 link/ether fe:6c:b5:da:c7:7d brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state auto, trust off [root@host ~]

ip link set enp2s0f0v0 down [root@host ~]

ip link show enp2s0f0 23: enp2s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether 3c:ec:ef:b7:dd:04 brd ff:ff:ff:ff:ff:ff vf 0 link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state auto, trust off Affected products include: Linux Linux Kernel.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.