Answer in brief
CVE-2024-35854 records a High severity (CVSS 7.8) vulnerability in mlxsw: spectrum_acl_tcam: Fix possible use-after-free during rehash. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), linux/linux_kernel (generic), linux/linux_kernel (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. 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), linux/linux_kernel (generic), linux/linux_kernel (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c9c9af91f1d9a636aecc55302c792538e549a430 <e118e7ea24d1392878ef85926627c6bc640c4388 || >=c9c9af91f1d9a636aecc55302c792538e549a430 <a429a912d6c779807f4d72a6cc0a1efaaa3613e1 || >=c9c9af91f1d9a636aecc55302c792538e549a430 <4c89642ca47fb620914780c7c51d8d1248201121 || >=c9c9af91f1d9a636aecc55302c792538e549a430 <813e2ab753a8f8c243a39ede20c2e0adc15f3887 || >=c9c9af91f1d9a636aecc55302c792538e549a430 <311eeaa7b9e26aba5b3d57b09859f07d8e9fc049 || >=c9c9af91f1d9a636aecc55302c792538e549a430 <a02687044e124f8ccb427cd3632124a4e1a7d7c1 || >=c9c9af91f1d9a636aecc55302c792538e549a430 <54225988889931467a9b55fdbef534079b665519 | e118e7ea24d1392878ef85926627c6bc640c4388, a429a912d6c779807f4d72a6cc0a1efaaa3613e1, 4c89642ca47fb620914780c7c51d8d1248201121, 813e2ab753a8f8c243a39ede20c2e0adc15f3887, 311eeaa7b9e26aba5b3d57b09859f07d8e9fc049, a02687044e124f8ccb427cd3632124a4e1a7d7c1, 54225988889931467a9b55fdbef534079b665519 |
| Linux/Linuxgeneric | 5.1 | Not reported |
| linux/linux_kernelgeneric | c9c9af91f1d9 | Not reported |
| linux/linux_kernelgeneric | 5.1 | Not reported |
Published upstream
May 17, 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 possible use-after-free during rehash The rehash delayed work migrates filters from one region to another according to the number of available credits. The migrated from region is destroyed at the end of the work if the number of credits is non-negative as the assumption is that this is indicative of migration being complete. This assumption is incorrect as a non-negative number of credits can also be the result of a failed migration. The destruction of a region that still has filters referencing it can result in a use-after-free [1]. Fix by not destroying the region if migration failed. [1] BUG: KASAN: slab-use-after-free in mlxsw_sp_acl_ctcam_region_entry_remove+0x21d/0x230 Read of size 8 at addr ffff8881735319e8 by task kworker/0:31/3858 CPU: 0 PID: 3858 Comm: kworker/0:31 Tainted: G W 6.9.0-rc2-custom-00782-gf2275c2157d8 #5 Hardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019 Workqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work Call Trace: <TASK> dump_stack_lvl+0xc6/0x120 print_report+0xce/0x670 kasan_report+0xd7/0x110 mlxsw_sp_acl_ctcam_region_entry_remove+0x21d/0x230 mlxsw_sp_acl_ctcam_entry_del+0x2e/0x70 mlxsw_sp_acl_atcam_entry_del+0x81/0x210 mlxsw_sp_acl_tcam_vchunk_migrate_all+0x3cd/0xb50 mlxsw_sp_acl_tcam_vregion_rehash_work+0x157/0x1300 process_one_work+0x8eb/0x19b0 worker_thread+0x6c9/0xf70 kthread+0x2c9/0x3b0 ret_from_fork+0x4d/0x80 ret_from_fork_asm+0x1a/0x30 </TASK> Allocated by task 174: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 __kasan_kmalloc+0x8f/0xa0 __kmalloc+0x19c/0x360 mlxsw_sp_acl_tcam_region_create+0xdf/0x9c0 mlxsw_sp_acl_tcam_vregion_rehash_work+0x954/0x1300 process_one_work+0x8eb/0x19b0 worker_thread+0x6c9/0xf70 kthread+0x2c9/0x3b0 ret_from_fork+0x4d/0x80 ret_from_fork_asm+0x1a/0x30 Freed by task 7: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x60 poison_slab_object+0x102/0x170 __kasan_slab_free+0x14/0x30 kfree+0xc1/0x290 mlxsw_sp_acl_tcam_region_destroy+0x272/0x310 mlxsw_sp_acl_tcam_vregion_rehash_work+0x731/0x1300 process_one_work+0x8eb/0x19b0 worker_thread+0x6c9/0xf70 kthread+0x2c9/0x3b0 ret_from_fork+0x4d/0x80 ret_from_fork_asm+0x1a/0x30
Quoted source text, attributed separately from HOL analysis.