cbcvebase.
CVE-2024-41066
published 2024-07-29

CVE-2024-41066: 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…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
13.5th percentile
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=, skb=, 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.

Affected

30 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.106-1 (bookworm)linux 6.1.106-1 (bookworm)
debianlinux-6.1< linux 6.1.106-1 (bookworm)linux 6.1.106-1 (bookworm)
linuxlinux
linuxlinux
linuxlinux
linuxlinux>= 5.12.17 < 5.135.13
linuxlinux>= 5.13.2 < 5.145.14
linuxlinux>= 65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8 < 16ad1557cae582e79bb82dddd612d9bdfaa11d4c16ad1557cae582e79bb82dddd612d9bdfaa11d4c
linuxlinux>= 65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8 < 267c61c4afed0ff9a2e83462abad3f41d8ca1f06267c61c4afed0ff9a2e83462abad3f41d8ca1f06
linuxlinux>= 65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8 < e7b75def33eae61ddaad6cb616c517dc3882eb2ae7b75def33eae61ddaad6cb616c517dc3882eb2a
linuxlinux>= 65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8 < 0983d288caf984de0202c66641577b739caad5610983d288caf984de0202c66641577b739caad561
linuxlinux_kernel< 6.1.1016.1.101
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.1.106-16.1.106-1
linuxlinux_kernel>= 0 < 6.9.11-16.9.11-1
linuxlinux_kernel>= 0 < 6.9.11-16.9.11-1
linuxlinux_kernel>= 0 < 5.4.0-208.2285.4.0-208.228
linuxlinux_kernel>= 0 < 5.15.0-133.1445.15.0-133.144
linuxlinux_kernel>= 0 < 6.8.0-48.486.8.0-48.48
linuxlinux_kernel>= 0 < 4.4.0-263.2974.4.0-263.297
linuxlinux_kernel>= 0 < 4.15.0-233.2454.15.0-233.245

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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