CVE-2026-52937None▾ SunlitIn 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 us…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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.
Linux >= 3b23a32a63219f51a5298bc55a65ecee866e79d0 < 37d028a473b0826ad5970b52b791db4a29a23627Linux >= 3b23a32a63219f51a5298bc55a65ecee866e79d0 < 8197905d97099d8b1e3883112bbb497abd20f9f0Linux >= 3b23a32a63219f51a5298bc55a65ecee866e79d0 < 719007c3492f0f1f9e9cdbed8ac45ba45bb13eebLinux >= 3b23a32a63219f51a5298bc55a65ecee866e79d0 < 05305e832be7b9d65b2b72caacf7d850b3942b2aLinux >= 3b23a32a63219f51a5298bc55a65ecee866e79d0 < bddc09212c24934643bd44fc794748d2bbb3b6cdLinux 176188cff67ec1aa55103647b61d02315cc38e98Linux 1fc205d9e400f069ebf30d3faa6ec2bab2cbd7b4Linux 4d0ae760c02c98fc78b78d3a0509896bc648ad1cLinux >= 5.4.103 < 5.5Linux >= 5.10.21 < 5.11Linux >= 5.11.4 < 5.12Linux 5.12Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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