CVE-2023-53720
- Published: 2025-10-22T14:15:46.700
- Last modified: 1761167568
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: Release the label when replacing existing ct entry
Cited commit doesn’t release the label mapping when replacing existing ct
entry which leads to following memleak report:
unreferenced object 0xffff8881854cf280 (size 96):
comm “kworker/u48:74”, pid 23093, jiffies 4296664564 (age 175.944s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 …………….
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 …………….
backtrace:
[] __kmalloc+0x4b/0x1c0
[] mapping_add+0x6e8/0xc90 [mlx5_core]
[] mlx5_get_label_mapping+0x66/0xe0 [mlx5_core]
[] mlx5_tc_ct_entry_create_mod_hdr+0x1c4/0xf50 [mlx5_core]
[] mlx5_tc_ct_entry_add_rule+0x16f/0xaf0 [mlx5_core]
[] mlx5_tc_ct_block_flow_offload_add+0x10cb/0x1f90 [mlx5_core]
[] mlx5_tc_ct_block_flow_offload+0x14a/0x630 [mlx5_core]
[] nf_flow_offload_tuple+0x1a3/0x390 [nf_flow_table]
[] flow_offload_work_handler+0x257/0xd30 [nf_flow_table]
[] process_one_work+0x7c2/0x13e0
[] worker_thread+0x59d/0xec0
[] kthread+0x28f/0x330
[] ret_from_fork+0x1f/0x30
Fix the issue by correctly releasing the label mapping.
Related CVE by CWE
No related CWE found.
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How to fix CVE-2023-53720
Description: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Release the label when replacing existing ct entry Cited commit doesn’t release the label mapping when replacing existing ct entry which leads to following memleak report: unreferenced object 0xffff8881854cf280 (size 96): comm “kworker/u48:74”, pid 23093, jiffies 4296664564 (age 175.944s) hex dump (first 32 bytes): […]
Exploit Difficulty: HARD
⏱️ Time to exploit: > 4 hours
🛠️ Required skills: Advanced security expertise
💰 Public exploits: Rare or not public
How to Fix:
- Check if you're running the affected product
- Update to the latest patched version
- If patching is not immediately possible: restrict network exposure, apply least-privilege access
- Test the fix in a staging environment first
- Review logs for signs of exploitation
- Monitor for IOCs (Indicators of Compromise)
- Enable automatic security updates
- Set up vulnerability monitoring
- Review and harden security configurations
Exploit Difficulty Assessment
Vulnerability Timeline
CVE details first published to NVD database
CVE details were updated
Added to this CVE tracking system
Detection Rules & IOCs
No specific detection rules generated for this vulnerability type.
No vendor/product data available.