CVE-2024-35855

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Source
https://cve.org/CVERecord?id=CVE-2024-35855
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-35855.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-35855
Downstream
Related
Published
2024-05-17T14:47:31Z
Modified
2026-08-12T03:51:22Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
mlxsw: spectrum_acl_tcam: Fix possible use-after-free during activity update
Details

In the Linux kernel, the following vulnerability has been resolved:

mlxsw: spectrum_acl_tcam: Fix possible use-after-free during activity update

The rule activity update delayed work periodically traverses the list of configured rules and queries their activity from the device.

As part of this task it accesses the entry pointed by 'ventry->entry', but this entry can be changed concurrently by the rehash delayed work, leading to a use-after-free [1].

Fix by closing the race and perform the activity query under the 'vregion->lock' mutex.

[1] BUG: KASAN: slab-use-after-free in mlxsw_sp_acl_tcam_flower_rule_activity_get+0x121/0x140 Read of size 8 at addr ffff8881054ed808 by task kworker/0:18/181

CPU: 0 PID: 181 Comm: kworker/0:18 Not tainted 6.9.0-rc2-custom-00781-gd5ab772d32f7 #2 Hardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019 Workqueue: mlxsw_core mlxsw_sp_acl_rule_activity_update_work Call Trace: dump_stack_lvl+0xc6/0x120 print_report+0xce/0x670 kasan_report+0xd7/0x110 mlxsw_sp_acl_tcam_flower_rule_activity_get+0x121/0x140 mlxsw_sp_acl_rule_activity_update_work+0x219/0x400 process_one_work+0x8eb/0x19b0 worker_thread+0x6c9/0xf70 kthread+0x2c9/0x3b0 ret_from_fork+0x4d/0x80 ret_from_fork_asm+0x1a/0x30

Allocated by task 1039: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 __kasan_kmalloc+0x8f/0xa0 __kmalloc+0x19c/0x360 mlxsw_sp_acl_tcam_entry_create+0x7b/0x1f0 mlxsw_sp_acl_tcam_vchunk_migrate_all+0x30d/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

Freed by task 1039: 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_vchunk_migrate_all+0x3d7/0xb50 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

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/35xxx/CVE-2024-35855.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
2bffc5322fd8679e879cd6370881ee50cf141ada
Fixed
1b73f6e4ea770410a937a8db98f77e52594d23a0
Fixed
e24d2487424779c02760ff50cd9021b8676e19ef
Fixed
c17976b42d546ee118ca300db559630ee96fb758
Fixed
b996e8699da810e4c915841d6aaef761007f933a
Fixed
feabdac2057e863d0e140a2adf3d232eb4882db4
Fixed
b183b915beef818a25e3154d719ca015a1ae0770
Fixed
79b5b4b18bc85b19d3a518483f9abbbe6d7b3ba4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-35855.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.1.0
Fixed
5.4.275
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.216
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.158
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.90
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.30
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.8.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-35855.json"