vulnerability

Ubuntu: (Multiple Advisories) (CVE-2024-35901): Linux kernel (Azure) vulnerabilities

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
05/19/2024
Added
07/09/2024
Modified
02/20/2025

Description

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

net: mana: Fix Rx DMA datasize and skb_over_panic

mana_get_rxbuf_cfg() aligns the RX buffer's DMA datasize to be
multiple of 64. So a packet slightly bigger than mtu+14, say 1536,
can be received and cause skb_over_panic.

Sample dmesg:
[ 5325.237162] skbuff: skb_over_panic: text:ffffffffc043277a len:1536 put:1536 head:ff1100018b517000 data:ff1100018b517100 tail:0x700 end:0x6ea dev:
[ 5325.243689] ------------[ cut here ]------------
[ 5325.245748] kernel BUG at net/core/skbuff.c:192!
[ 5325.247838] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
[ 5325.258374] RIP: 0010:skb_panic+0x4f/0x60
[ 5325.302941] Call Trace:
[ 5325.304389]
[ 5325.315794] ? skb_panic+0x4f/0x60
[ 5325.317457] ? asm_exc_invalid_op+0x1f/0x30
[ 5325.319490] ? skb_panic+0x4f/0x60
[ 5325.321161] skb_put+0x4e/0x50
[ 5325.322670] mana_poll+0x6fa/0xb50 [mana]
[ 5325.324578] __napi_poll+0x33/0x1e0
[ 5325.326328] net_rx_action+0x12e/0x280

As discussed internally, this alignment is not necessary. To fix
this bug, remove it from the code. So oversized packets will be
marked as CQE_RX_TRUNCATED by NIC, and dropped.

Solution(s)

ubuntu-upgrade-linux-image-5-15-0-1068-azureubuntu-upgrade-linux-image-5-15-0-1068-azure-fdeubuntu-upgrade-linux-image-6-5-0-1023-azureubuntu-upgrade-linux-image-6-5-0-1023-azure-fdeubuntu-upgrade-linux-image-6-8-0-1006-gkeubuntu-upgrade-linux-image-6-8-0-1007-intelubuntu-upgrade-linux-image-6-8-0-1007-raspiubuntu-upgrade-linux-image-6-8-0-1008-ibmubuntu-upgrade-linux-image-6-8-0-1008-oemubuntu-upgrade-linux-image-6-8-0-1008-oracleubuntu-upgrade-linux-image-6-8-0-1008-oracle-64kubuntu-upgrade-linux-image-6-8-0-1009-azureubuntu-upgrade-linux-image-6-8-0-1009-azure-fdeubuntu-upgrade-linux-image-6-8-0-1009-nvidiaubuntu-upgrade-linux-image-6-8-0-1009-nvidia-64kubuntu-upgrade-linux-image-6-8-0-1010-azureubuntu-upgrade-linux-image-6-8-0-1010-azure-fdeubuntu-upgrade-linux-image-6-8-0-1010-gcpubuntu-upgrade-linux-image-6-8-0-1011-awsubuntu-upgrade-linux-image-6-8-0-38-genericubuntu-upgrade-linux-image-6-8-0-38-generic-64kubuntu-upgrade-linux-image-6-8-0-38-lowlatencyubuntu-upgrade-linux-image-6-8-0-38-lowlatency-64kubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-azure-cvmubuntu-upgrade-linux-image-azure-fdeubuntu-upgrade-linux-image-azure-fde-lts-22-04ubuntu-upgrade-linux-image-azure-lts-22-04ubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-64kubuntu-upgrade-linux-image-generic-64k-hwe-24-04ubuntu-upgrade-linux-image-generic-hwe-24-04ubuntu-upgrade-linux-image-generic-lpaeubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-ibmubuntu-upgrade-linux-image-ibm-classicubuntu-upgrade-linux-image-ibm-lts-24-04ubuntu-upgrade-linux-image-intelubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-64kubuntu-upgrade-linux-image-nvidiaubuntu-upgrade-linux-image-nvidia-64kubuntu-upgrade-linux-image-oem-24-04ubuntu-upgrade-linux-image-oem-24-04aubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-oracle-64kubuntu-upgrade-linux-image-raspiubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-hwe-24-04
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