CVE - CVE-2024-41066

CVE-ID
CVE-2024-41066	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0983d288caf984de0202c66641577b739caad561 URL:https://git.kernel.org/stable/c/0983d288caf984de0202c66641577b739caad561 MISC:https://git.kernel.org/stable/c/16ad1557cae582e79bb82dddd612d9bdfaa11d4c URL:https://git.kernel.org/stable/c/16ad1557cae582e79bb82dddd612d9bdfaa11d4c MISC:https://git.kernel.org/stable/c/267c61c4afed0ff9a2e83462abad3f41d8ca1f06 URL:https://git.kernel.org/stable/c/267c61c4afed0ff9a2e83462abad3f41d8ca1f06 MISC:https://git.kernel.org/stable/c/e7b75def33eae61ddaad6cb616c517dc3882eb2a URL:https://git.kernel.org/stable/c/e7b75def33eae61ddaad6cb616c517dc3882eb2a
Assigning CNA
kernel.org
Date Record Created
20240712	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240712)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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