CVE - CVE-2024-26586

CVE-ID
CVE-2024-26586	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: mlxsw: spectrum_acl_tcam: Fix stack corruption When tc filters are first added to a net device, the corresponding local port gets bound to an ACL group in the device. The group contains a list of ACLs. In turn, each ACL points to a different TCAM region where the filters are stored. During forwarding, the ACLs are sequentially evaluated until a match is found. One reason to place filters in different regions is when they are added with decreasing priorities and in an alternating order so that two consecutive filters can never fit in the same region because of their key usage. In Spectrum-2 and newer ASICs the firmware started to report that the maximum number of ACLs in a group is more than 16, but the layout of the register that configures ACL groups (PAGT) was not updated to account for that. It is therefore possible to hit stack corruption [1] in the rare case where more than 16 ACLs in a group are required. Fix by limiting the maximum ACL group size to the minimum between what the firmware reports and the maximum ACLs that fit in the PAGT register. Add a test case to make sure the machine does not crash when this condition is hit. [1] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: mlxsw_sp_acl_tcam_group_update+0x116/0x120 [...] dump_stack_lvl+0x36/0x50 panic+0x305/0x330 __stack_chk_fail+0x15/0x20 mlxsw_sp_acl_tcam_group_update+0x116/0x120 mlxsw_sp_acl_tcam_group_region_attach+0x69/0x110 mlxsw_sp_acl_tcam_vchunk_get+0x492/0xa20 mlxsw_sp_acl_tcam_ventry_add+0x25/0xe0 mlxsw_sp_acl_rule_add+0x47/0x240 mlxsw_sp_flower_replace+0x1a9/0x1d0 tc_setup_cb_add+0xdc/0x1c0 fl_hw_replace_filter+0x146/0x1f0 fl_change+0xc17/0x1360 tc_new_tfilter+0x472/0xb90 rtnetlink_rcv_msg+0x313/0x3b0 netlink_rcv_skb+0x58/0x100 netlink_unicast+0x244/0x390 netlink_sendmsg+0x1e4/0x440 ____sys_sendmsg+0x164/0x260 ___sys_sendmsg+0x9a/0xe0 __sys_sendmsg+0x7a/0xc0 do_syscall_64+0x40/0xe0 entry_SYSCALL_64_after_hwframe+0x63/0x6b
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/2f5e1565740490706332c06f36211d4ce0f88e62 URL:https://git.kernel.org/stable/c/2f5e1565740490706332c06f36211d4ce0f88e62 MISC:https://git.kernel.org/stable/c/348112522a35527c5bcba933b9fefb40a4f44f15 URL:https://git.kernel.org/stable/c/348112522a35527c5bcba933b9fefb40a4f44f15 MISC:https://git.kernel.org/stable/c/483ae90d8f976f8339cf81066312e1329f2d3706 URL:https://git.kernel.org/stable/c/483ae90d8f976f8339cf81066312e1329f2d3706 MISC:https://git.kernel.org/stable/c/56750ea5d15426b5f307554e7699e8b5f76c3182 URL:https://git.kernel.org/stable/c/56750ea5d15426b5f307554e7699e8b5f76c3182 MISC:https://git.kernel.org/stable/c/6fd24675188d354b1cad47462969afa2ab09d819 URL:https://git.kernel.org/stable/c/6fd24675188d354b1cad47462969afa2ab09d819 MISC:https://git.kernel.org/stable/c/a361c2c1da5dbb13ca67601cf961ab3ad68af383 URL:https://git.kernel.org/stable/c/a361c2c1da5dbb13ca67601cf961ab3ad68af383
Assigning CNA
kernel.org
Date Record Created
20240219	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 (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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