CVE-2026-52937
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2026-06-24
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
In the Linux kernel, the following vulnerability has been resolved: tap: fix stack info leak in tap_ioctl() SIOCGIFHWADDR In the SIOCGIFHWADDR path, tap_ioctl() copies 16 bytes of an uninitialised on-stack struct sockaddr_storage to userspace via ifr_hwaddr, but netif_get_mac_address() only writes sa_family and dev->addr_len (6 for Ethernet) bytes, leaving sa_data[6..13] uninitialised. Those 8 trailing bytes leak kernel stack contents; SIOCGIFHWADDR on a macvtap chardev returns kernel .text and direct-map pointers, defeating KASLR. Initialise ss at declaration.
Weakness Classification (1)
Affected Software (18)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 3b23a32a63219f51a5298bc55a65ecee866e79d0 < 4b6dcfe0e3dfffd8057a4fc99b3f096c45709905 |
| Linux | Linux | 3b23a32a63219f51a5298bc55a65ecee866e79d0 < 37d028a473b0826ad5970b52b791db4a29a23627 |
| Linux | Linux | 3b23a32a63219f51a5298bc55a65ecee866e79d0 < 8197905d97099d8b1e3883112bbb497abd20f9f0 |
| Linux | Linux | 3b23a32a63219f51a5298bc55a65ecee866e79d0 < 719007c3492f0f1f9e9cdbed8ac45ba45bb13eeb |
| Linux | Linux | 3b23a32a63219f51a5298bc55a65ecee866e79d0 < 05305e832be7b9d65b2b72caacf7d850b3942b2a |
| Linux | Linux | 3b23a32a63219f51a5298bc55a65ecee866e79d0 < bddc09212c24934643bd44fc794748d2bbb3b6cd |
| Linux | Linux | 176188cff67ec1aa55103647b61d02315cc38e98 |
| Linux | Linux | 1fc205d9e400f069ebf30d3faa6ec2bab2cbd7b4 |
| Linux | Linux | 4d0ae760c02c98fc78b78d3a0509896bc648ad1c |
| Linux | Linux | 5.4.103 < 5.5 |
| Linux | Linux | 5.10.21 < 5.11 |
| Linux | Linux | 5.11.4 < 5.12 |
| Linux | Linux | 5.12 |
| linux | linux_kernel | 5.4.103 – 5.5 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |