{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52937","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-06-09T07:44:35.370Z","datePublished":"2026-06-24T07:14:27.305Z","dateUpdated":"2026-06-24T07:14:27.305Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-24T07:14:27.305Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntap: fix stack info leak in tap_ioctl() SIOCGIFHWADDR\n\nIn the SIOCGIFHWADDR path, tap_ioctl() copies 16 bytes of an\nuninitialised on-stack struct sockaddr_storage to userspace via\nifr_hwaddr, but netif_get_mac_address() only writes sa_family and\ndev->addr_len (6 for Ethernet) bytes, leaving sa_data[6..13] uninitialised.\n\nThose 8 trailing bytes leak kernel stack contents; SIOCGIFHWADDR on a\nmacvtap chardev returns kernel .text and direct-map pointers, defeating\nKASLR.\n\nInitialise ss at declaration."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/tap.c"],"versions":[{"version":"3b23a32a63219f51a5298bc55a65ecee866e79d0","lessThan":"719007c3492f0f1f9e9cdbed8ac45ba45bb13eeb","status":"affected","versionType":"git"},{"version":"3b23a32a63219f51a5298bc55a65ecee866e79d0","lessThan":"05305e832be7b9d65b2b72caacf7d850b3942b2a","status":"affected","versionType":"git"},{"version":"3b23a32a63219f51a5298bc55a65ecee866e79d0","lessThan":"bddc09212c24934643bd44fc794748d2bbb3b6cd","status":"affected","versionType":"git"},{"version":"176188cff67ec1aa55103647b61d02315cc38e98","status":"affected","versionType":"git"},{"version":"1fc205d9e400f069ebf30d3faa6ec2bab2cbd7b4","status":"affected","versionType":"git"},{"version":"4d0ae760c02c98fc78b78d3a0509896bc648ad1c","status":"affected","versionType":"git"},{"version":"5.4.103","lessThan":"5.5","status":"affected","versionType":"semver"},{"version":"5.10.21","lessThan":"5.11","status":"affected","versionType":"semver"},{"version":"5.11.4","lessThan":"5.12","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/tap.c"],"versions":[{"version":"5.12","status":"affected"},{"version":"0","lessThan":"5.12","status":"unaffected","versionType":"semver"},{"version":"6.18.34","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.11","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.18.34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"7.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"7.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11.4"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/719007c3492f0f1f9e9cdbed8ac45ba45bb13eeb"},{"url":"https://git.kernel.org/stable/c/05305e832be7b9d65b2b72caacf7d850b3942b2a"},{"url":"https://git.kernel.org/stable/c/bddc09212c24934643bd44fc794748d2bbb3b6cd"}],"title":"tap: fix stack info leak in tap_ioctl() SIOCGIFHWADDR","x_generator":{"engine":"bippy-1.2.0"}}}}