In the Linux kernel, the following vulnerability has been resolved:
sfc: fix null pointer dereference in efx_hard_start_xmit
Trying to get the channel from the tx_queue variable here is wrong because we can only be here if tx_queue is NULL, so we shouldn't dereference it. As the above comment in the code says, this is very unlikely to happen, but it's wrong anyway so let's fix it.
I hit this issue because of a different bug that caused tx_queue to be NULL. If that happens, this is the error message that we get here: BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [...] RIP: 0010:efx_hard_start_xmit+0x153/0x170 [sfc]
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 30, 2024 | Apr 28, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Apr 28, 2024 |
| Suse | — | Upgrade kernel-rt-vdsoUpgrade kselftests-kmp-rtUpgrade dlm-kmp-rtUpgrade dtb-mediatekUpgrade dtb-sprdUpgrade ocfs2-kmp-azureUpgrade kernel-azureUpgrade kernel-obs-buildUpgrade kernel-rt-livepatch-develUpgrade kernel-rt_debug-vdsoUpgrade dtb-allwinnerUpgrade kernel-docsUpgrade kernel-devel-rtUpgrade kernel-syms-rtUpgrade reiserfs-kmp-azureUpgrade reiserfs-kmp-defaultUpgrade kselftests-kmp-defaultUpgrade dtb-armUpgrade kernel-rt_debug-livepatch-develUpgrade dtb-socionextUpgrade kernel-default-livepatch-develUpgrade kernel-64kb-extraUpgrade dtb-renesasUpgrade dlm-kmp-defaultUpgrade kernel-source-vanillaUpgrade reiserfs-kmp-rtUpgrade cluster-md-kmp-64kbUpgrade kselftests-kmp-azureUpgrade kernel-rt-extraUpgrade ocfs2-kmp-defaultUpgrade kernel-defaultUpgrade kernel-kvmsmall-vdsoUpgrade kernel-develUpgrade kernel-azure-vdsoUpgrade kernel-debug-vdsoUpgrade kernel-default-baseUpgrade kernel-rt-livepatchUpgrade kernel-default-optionalUpgrade dtb-rockchipUpgrade kernel-rt-develUpgrade gfs2-kmp-defaultUpgrade kernel-rt-optionalUpgrade dtb-nvidiaUpgrade dlm-kmp-azureUpgrade kernel-default-base-rebuildUpgrade kernel-obs-qaUpgrade ocfs2-kmp-64kbUpgrade kernel-64kbUpgrade kernel-64kb-livepatch-develUpgrade dtb-apmUpgrade kernel-kvmsmall-develUpgrade kernel-default-develUpgrade dtb-marvellUpgrade dtb-exynosUpgrade dtb-amazonUpgrade kernel-default-extraUpgrade dtb-amdUpgrade kernel-rtUpgrade kernel-source-azureUpgrade kernel-kvmsmallUpgrade kernel-debug-develUpgrade kernel-azure-extraUpgrade gfs2-kmp-64kbUpgrade dtb-qcomUpgrade dtb-broadcomUpgrade cluster-md-kmp-azureUpgrade dtb-lgUpgrade kernel-rt_debugUpgrade kernel-debugUpgrade dtb-alteraUpgrade kernel-docs-htmlUpgrade kernel-sourceUpgrade kernel-devel-azureUpgrade kernel-macrosUpgrade kernel-kvmsmall-livepatch-develUpgrade gfs2-kmp-azureUpgrade kernel-64kb-optionalUpgrade gfs2-kmp-rtUpgrade dtb-freescaleUpgrade kernel-default-vdsoUpgrade kernel-azure-livepatch-develUpgrade dtb-appleUpgrade ocfs2-kmp-rtUpgrade kernel-zfcpdumpUpgrade cluster-md-kmp-rtUpgrade dtb-amlogicUpgrade dlm-kmp-64kbUpgrade kernel-rt_debug-develUpgrade dtb-xilinxUpgrade reiserfs-kmp-64kbUpgrade kernel-default-livepatchUpgrade kernel-debug-livepatch-develUpgrade kernel-symsUpgrade kernel-azure-develUpgrade kernel-source-rtUpgrade kselftests-kmp-64kbUpgrade kernel-syms-azureUpgrade kernel-64kb-develUpgrade dtb-hisiliconUpgrade dtb-caviumUpgrade cluster-md-kmp-defaultUpgrade kernel-azure-optional | Aug 9, 2024 | Apr 28, 2024 |
| Ubuntu | — | Upgrade linux-awsUpgrade linux-gcpUpgrade linux-lowlatency-hwe-5.15Upgrade linux-gkeUpgrade linuxUpgrade linux-aws-5.15Upgrade linux-gkeop-5.15Upgrade linux-oracleUpgrade linux-oracle-5.15Upgrade linux-lowlatencyUpgrade linux-intel-iotg-5.15Upgrade linux-realtimeUpgrade linux-azureUpgrade linux-azure-5.15Upgrade linux-kvmUpgrade linux-azure-fde-5.15Upgrade linux-riscv-5.15Upgrade linux-azure-fdeUpgrade linux-intel-iotgUpgrade linux-hwe-5.15Upgrade linux-ibmUpgrade linux-nvidiaUpgrade linux-gcp-5.15Upgrade linux-raspiUpgrade linux-gkeop | Nov 19, 2024 | Apr 28, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Apr 28, 2024 |
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