CVE-2026-52937
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
tap: fix stack info leak in tap_ioctl() SIOCGIFHWADDR
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 3b23a32a63219f51a5298bc55a65ecee866e79d0 | affected | git | 37d028a473b0826ad5970b52b791db4a29a23627 | Unavailable | None listed |
| 3b23a32a63219f51a5298bc55a65ecee866e79d0 | affected | git | 8197905d97099d8b1e3883112bbb497abd20f9f0 | Unavailable | None listed |
| 3b23a32a63219f51a5298bc55a65ecee866e79d0 | affected | git | 719007c3492f0f1f9e9cdbed8ac45ba45bb13eeb | Unavailable | None listed |
| 3b23a32a63219f51a5298bc55a65ecee866e79d0 | affected | git | 05305e832be7b9d65b2b72caacf7d850b3942b2a | Unavailable | None listed |
| 3b23a32a63219f51a5298bc55a65ecee866e79d0 | affected | git | bddc09212c24934643bd44fc794748d2bbb3b6cd | Unavailable | None listed |
| 176188cff67ec1aa55103647b61d02315cc38e98 | affected | git | Unavailable | Unavailable | None listed |
| 1fc205d9e400f069ebf30d3faa6ec2bab2cbd7b4 | affected | git | Unavailable | Unavailable | None listed |
| 4d0ae760c02c98fc78b78d3a0509896bc648ad1c | affected | git | Unavailable | Unavailable | None listed |
| 5.4.103 | affected | semver | 5.5 | Unavailable | None listed |
| 5.10.21 | affected | semver | 5.11 | Unavailable | None listed |
| 5.11.4 | affected | semver | 5.12 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.12 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.12 | Unavailable | None listed |
| 6.6.160 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.114 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.34 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.11 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |