In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_skbedit: fix divide-by-zero in tcf_skbedit_hash()
Commit 38a6f0865796 ("net: sched: support hash selecting tx queue")
added SKBEDIT_F_TXQ_SKBHASH support. The inclusive range size is
computed as:
mapping_mod = queue_mapping_max - queue_mapping + 1;
The range size can be 65536 when the requested range covers all possible
u16 queue IDs (e.g. queue_mapping=0 and queue_mapping_max=U16_MAX).
That value cannot be represented in a u16 and previously wrapped to 0,
so tcf_skbedit_hash() could trigger a divide-by-zero:
queue_mapping += skb_get_hash(skb) % params->mapping_mod;
Compute mapping_mod in a wider type and reject ranges larger than U16_MAX
to prevent params->mapping_mod from becoming 0 and avoid the crash.
References
Configurations
Configuration 1 (hide)
|
History
12 May 2026, 18:54
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/015cebdfcb97b5347fb7f598ea712a281cb35840 - Patch | |
| References | () https://git.kernel.org/stable/c/3c2b95b26860bd6f8e2310d31ea1200d3f8f173e - Patch | |
| References | () https://git.kernel.org/stable/c/4ece5eb4836f8ff03b9004dc2430a7169f282851 - Patch | |
| References | () https://git.kernel.org/stable/c/59809fda4da7730cfe84a948033f47eb45db073d - Patch | |
| References | () https://git.kernel.org/stable/c/9c735a7d98c982a786b0db71eb6566ee00aaa04f - Patch | |
| References | () https://git.kernel.org/stable/c/be054cc66f739a9ba615dba9012a07fab8e7dd6f - Patch | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CWE | CWE-369 | |
| First Time |
Linux linux Kernel
Linux |
06 May 2026, 12:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-06 12:16
Updated : 2026-05-12 18:54
NVD link : CVE-2026-43238
Mitre link : CVE-2026-43238
CVE.ORG link : CVE-2026-43238
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-369
Divide By Zero