Answer in brief
CVE-2024-26586 records a Unknown severity vulnerability in mlxsw: spectrum_acl_tcam: Fix stack corruption. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c3ab435466d5109b2c7525a3b90107d4d9e918fc <56750ea5d15426b5f307554e7699e8b5f76c3182 || >=c3ab435466d5109b2c7525a3b90107d4d9e918fc <348112522a35527c5bcba933b9fefb40a4f44f15 || >=c3ab435466d5109b2c7525a3b90107d4d9e918fc <6fd24675188d354b1cad47462969afa2ab09d819 || >=c3ab435466d5109b2c7525a3b90107d4d9e918fc <2f5e1565740490706332c06f36211d4ce0f88e62 || >=c3ab435466d5109b2c7525a3b90107d4d9e918fc <a361c2c1da5dbb13ca67601cf961ab3ad68af383 || >=c3ab435466d5109b2c7525a3b90107d4d9e918fc <483ae90d8f976f8339cf81066312e1329f2d3706 | 56750ea5d15426b5f307554e7699e8b5f76c3182, 348112522a35527c5bcba933b9fefb40a4f44f15, 6fd24675188d354b1cad47462969afa2ab09d819, 2f5e1565740490706332c06f36211d4ce0f88e62, a361c2c1da5dbb13ca67601cf961ab3ad68af383, 483ae90d8f976f8339cf81066312e1329f2d3706 |
| Linux/Linuxgeneric | 4.19 | Not reported |
Published upstream
Feb 22, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2024-26586 records a Unknown severity vulnerability in mlxsw: spectrum_acl_tcam: Fix stack corruption. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c3ab435466d5109b2c7525a3b90107d4d9e918fc <56750ea5d15426b5f307554e7699e8b5f76c3182 || >=c3ab435466d5109b2c7525a3b90107d4d9e918fc <348112522a35527c5bcba933b9fefb40a4f44f15 || >=c3ab435466d5109b2c7525a3b90107d4d9e918fc <6fd24675188d354b1cad47462969afa2ab09d819 || >=c3ab435466d5109b2c7525a3b90107d4d9e918fc <2f5e1565740490706332c06f36211d4ce0f88e62 || >=c3ab435466d5109b2c7525a3b90107d4d9e918fc <a361c2c1da5dbb13ca67601cf961ab3ad68af383 || >=c3ab435466d5109b2c7525a3b90107d4d9e918fc <483ae90d8f976f8339cf81066312e1329f2d3706 | 56750ea5d15426b5f307554e7699e8b5f76c3182, 348112522a35527c5bcba933b9fefb40a4f44f15, 6fd24675188d354b1cad47462969afa2ab09d819, 2f5e1565740490706332c06f36211d4ce0f88e62, a361c2c1da5dbb13ca67601cf961ab3ad68af383, 483ae90d8f976f8339cf81066312e1329f2d3706 |
| Linux/Linuxgeneric | 4.19 | Not reported |
Published upstream
Feb 22, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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
Quoted source text, attributed separately from HOL analysis.