In the Linux kernel, the following vulnerability has been resolved:
mlxsw: spectrum_buffers: Fix memory corruptions on Spectrum-4 systems
The following two shared buffer operations make use of the Shared Buffer Status Register (SBSR):
# devlink sb occupancy snapshot pci/0000:01:00.0 # devlink sb occupancy clearmax pci/0000:01:00.0
The register has two masks of 256 bits to denote on which ingress / egress ports the register should operate on. Spectrum-4 has more than 256 ports, so the register was extended by cited commit with a new 'port_page' field.
However, when filling the register's payload, the driver specifies the ports as absolute numbers and not relative to the first port of the port page, resulting in memory corruptions [1].
Fix by specifying the ports relative to the first port of the port page.
[1] BUG: KASAN: slab-use-after-free in mlxsw_sp_sb_occ_snapshot+0xb6d/0xbc0 Read of size 1 at addr ffff8881068cb00f by task devlink/1566 [...] Call Trace: <TASK> dump_stack_lvl+0xc6/0x120 print_report+0xce/0x670 kasan_report+0xd7/0x110 mlxsw_sp_sb_occ_snapshot+0xb6d/0xbc0 mlxsw_devlink_sb_occ_snapshot+0x75/0xb0 devlink_nl_sb_occ_snapshot_doit+0x1f9/0x2a0 genl_family_rcv_msg_doit+0x20c/0x300 genl_rcv_msg+0x567/0x800 netlink_rcv_skb+0x170/0x450 genl_rcv+0x2d/0x40 netlink_unicast+0x547/0x830 netlink_sendmsg+0x8d4/0xdb0 __sys_sendto+0x49b/0x510 __x64_sys_sendto+0xe5/0x1c0 do_syscall_64+0xc1/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f [...] Allocated by task 1: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 __kasan_kmalloc+0x8f/0xa0 copy_verifier_state+0xbc2/0xfb0 do_check_common+0x2c51/0xc7e0 bpf_check+0x5107/0x9960 bpf_prog_load+0xf0e/0x2690 __sys_bpf+0x1a61/0x49d0 __x64_sys_bpf+0x7d/0xc0 do_syscall_64+0xc1/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 1: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x60 poison_slab_object+0x109/0x170 __kasan_slab_free+0x14/0x30 kfree+0xca/0x2b0 free_verifier_state+0xce/0x270 do_check_common+0x4828/0xc7e0 bpf_check+0x5107/0x9960 bpf_prog_load+0xf0e/0x2690 __sys_bpf+0x1a61/0x49d0 __x64_sys_bpf+0x7d/0xc0 do_syscall_64+0xc1/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Aug 7, 2024 | Jul 29, 2024 |
| Oracle_linux | — | Upgrade kernel-uek | Feb 10, 2025 | Jul 29, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jul 29, 2024 |
| Suse | — | Upgrade dtb-hisiliconUpgrade kernel-azureUpgrade kernel-kvmsmall-vdsoUpgrade kernel-obs-buildUpgrade kselftests-kmp-azureUpgrade dtb-amazonUpgrade dtb-lgUpgrade kernel-rt_debugUpgrade kernel-rt_debug-vdsoUpgrade kernel-source-azureUpgrade reiserfs-kmp-64kbUpgrade dtb-amdUpgrade reiserfs-kmp-rtUpgrade kernel-kvmsmall-livepatch-develUpgrade kselftests-kmp-64kbUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-azure-vdsoUpgrade dtb-broadcomUpgrade kernel-64kbUpgrade kernel-source-vanillaUpgrade kernel-rt-livepatch-develUpgrade ocfs2-kmp-64kbUpgrade kernel-rt-extraUpgrade dtb-alteraUpgrade kernel-azure-livepatch-develUpgrade kernel-debug-vdsoUpgrade kernel-azure-extraUpgrade dtb-marvellUpgrade dtb-socionextUpgrade cluster-md-kmp-azureUpgrade dtb-sprdUpgrade kernel-64kb-extraUpgrade kernel-rt-optionalUpgrade dtb-allwinnerUpgrade kernel-azure-develUpgrade gfs2-kmp-defaultUpgrade ocfs2-kmp-defaultUpgrade kernel-debug-develUpgrade gfs2-kmp-azureUpgrade dtb-freescaleUpgrade kernel-docs-htmlUpgrade kernel-azure-optionalUpgrade kernel-debug-livepatch-develUpgrade kernel-source-rtUpgrade kernel-zfcpdumpUpgrade dtb-appleUpgrade kernel-default-develUpgrade kernel-rt-vdsoUpgrade kernel-rt_debug-develUpgrade kernel-syms-rtUpgrade kernel-64kb-optionalUpgrade kernel-sourceUpgrade dtb-caviumUpgrade dtb-exynosUpgrade kernel-default-baseUpgrade kernel-default-livepatchUpgrade kernel-devel-azureUpgrade kernel-default-livepatch-develUpgrade dtb-renesasUpgrade dlm-kmp-64kbUpgrade kernel-kvmsmall-develUpgrade kernel-docsUpgrade dtb-mediatekUpgrade kernel-default-optionalUpgrade kernel-default-base-rebuildUpgrade dtb-amlogicUpgrade kernel-develUpgrade kernel-defaultUpgrade dtb-xilinxUpgrade kernel-rtUpgrade kernel-64kb-develUpgrade cluster-md-kmp-rtUpgrade kernel-symsUpgrade kernel-rt-develUpgrade ocfs2-kmp-azureUpgrade gfs2-kmp-rtUpgrade cluster-md-kmp-defaultUpgrade kselftests-kmp-rtUpgrade kernel-obs-qaUpgrade dlm-kmp-rtUpgrade kernel-64kb-livepatch-develUpgrade gfs2-kmp-64kbUpgrade dtb-nvidiaUpgrade dtb-armUpgrade dlm-kmp-defaultUpgrade cluster-md-kmp-64kbUpgrade kernel-syms-azureUpgrade kernel-devel-rtUpgrade reiserfs-kmp-defaultUpgrade ocfs2-kmp-rtUpgrade dtb-apmUpgrade dtb-qcomUpgrade reiserfs-kmp-azureUpgrade kernel-default-extraUpgrade kselftests-kmp-defaultUpgrade dlm-kmp-azureUpgrade dtb-rockchipUpgrade kernel-kvmsmallUpgrade kernel-default-vdsoUpgrade kernel-macrosUpgrade kernel-debug | Dec 5, 2025 | Sep 10, 2024 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1017-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-48-genericUpgrade linux-image-oracleUpgrade linux-image-gkeop-6.8Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-6.8.0-1013-gkeUpgrade linux-image-awsUpgrade linux-image-virtualUpgrade linux-image-generic-lpaeUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-1017-azure-fdeUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-6.8.0-1014-raspiUpgrade linux-image-6.8.0-1017-azureUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-6.8.0-1016-azureUpgrade linux-image-6.8.0-1002-gkeopUpgrade linux-image-6.8.0-48-generic-64kUpgrade linux-image-kvmUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.8.0-1016-gcpUpgrade linux-image-genericUpgrade linux-image-generic-64kUpgrade linux-image-6.8.0-1018-awsUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-1017-nvidia-lowlatencyUpgrade linux-image-6.8.0-1014-ibmUpgrade linux-image-6.8.0-1015-oracle-64kUpgrade linux-image-ibm-classicUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-48-lowlatencyUpgrade linux-image-ibmUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-1015-oracleUpgrade linux-image-nvidia-64kUpgrade linux-image-6.8.0-1017-nvidiaUpgrade linux-image-gkeUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-nvidiaUpgrade linux-image-gcpUpgrade linux-image-6.8.0-1017-gcpUpgrade linux-image-oem-24.04aUpgrade linux-image-oem-22.04Upgrade linux-image-oem-22.04bUpgrade linux-image-6.8.0-1017-nvidia-64kUpgrade linux-image-6.8.0-1016-oemUpgrade linux-image-oem-22.04aUpgrade linux-image-oracle-64kUpgrade linux-image-oem-24.04Upgrade linux-image-oem-22.04dUpgrade linux-image-gkeopUpgrade linux-image-raspiUpgrade linux-image-6.8.0-1016-azure-fdeUpgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-48-lowlatency-64kUpgrade linux-image-azure | Nov 4, 2024 | Jul 29, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 9, 2025 | Jul 29, 2024 |
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