CVE-2024-41066

MEDIUM EPSS 13.3%
Published Jul 29, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jul 29, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: ibmvnic: Add tx check to prevent skb leak Below is a summary of how the driver stores a reference to an skb during transmit: tx_buff[free_map[consumer_index]]->skb = new_skb; free_map[consumer_index] = IBMVNIC_INVALID_MAP; consumer_index ++; Where variable data looks like this: free_map == [4, IBMVNIC_INVALID_MAP, IBMVNIC_INVALID_MAP, 0, 3] consumer_index^ tx_buff == [skb=null, skb=<ptr>, skb=<ptr>, skb=null, skb=null] The driver has checks to ensure that free_map[consumer_index] pointed to a valid index but there was no check to ensure that this index pointed to an unused/null skb address. So, if, by some chance, our free_map and tx_buff lists become out of sync then we were previously risking an skb memory leak. This could then cause tcp congestion control to stop sending packets, eventually leading to ETIMEDOUT. Therefore, add a conditional to ensure that the skb address is null. If not then warn the user (because this is still a bug that should be patched) and free the old pointer to prevent memleak/tcp problems.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
13.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel* <6.1.101
linuxlinux_kernel*≥6.2  –  <6.6.42
linuxlinux_kernel*≥6.7  –  <6.9.11
linuxlinux_kernel6.10any
linuxlinux_kernel6.10any
linuxlinux_kernel6.10any
linuxlinux_kernel6.10any
linuxlinux_kernel6.10any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/0983d288caf984de0202c66641577b739caad561
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/16ad1557cae582e79bb82dddd612d9bdfaa11d4c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/267c61c4afed0ff9a2e83462abad3f41d8ca1f06
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e7b75def33eae61ddaad6cb616c517dc3882eb2a
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0983d288caf984de0202c66641577b739caad561
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/16ad1557cae582e79bb82dddd612d9bdfaa11d4c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/267c61c4afed0ff9a2e83462abad3f41d8ca1f06
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e7b75def33eae61ddaad6cb616c517dc3882eb2a
    Patch