{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53014","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-06-09T07:44:35.378Z","datePublished":"2026-06-24T16:29:24.605Z","dateUpdated":"2026-06-24T16:29:24.605Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-24T16:29:24.605Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_mirred: fix wrong device for mac_header_xmit check in tcf_blockcast_redir\n\nIn tcf_blockcast_redir(), when iterating block ports to redirect\npackets to multiple devices, the mac_header_xmit flag is queried\nfrom the wrong device. The loop sends to dev_prev but queries\ndev_is_mac_header_xmit(dev) — which is the NEXT device in the\niteration, not the one being sent to.\n\nThis causes tcf_mirred_to_dev() to make incorrect decisions about\nwhether to push or pull the MAC header. When the block contains\nmixed device types (e.g., an ethernet veth and a tunnel device),\nintermediate devices get the wrong mac_header_xmit flag, leading to\nskb header corruption. In the worst case, skb_push_rcsum with an\nincorrect mac_len can exhaust headroom and panic.\n\nThe last device in the loop is handled correctly (line 365-366 uses\ndev_is_mac_header_xmit(dev_prev)), confirming this is a copy-paste\noversight for the intermediate devices.\n\nFix by using dev_prev instead of dev for the mac_header_xmit query,\nconsistent with the device actually being sent to."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_mirred.c"],"versions":[{"version":"42f39036cda808d3de243192a2cf5125f12f3047","lessThan":"8fda5174286119addd28473fb2ec5bdf521c05a8","status":"affected","versionType":"git"},{"version":"42f39036cda808d3de243192a2cf5125f12f3047","lessThan":"7db3e4e03032261b1b519341123fc30d995478ca","status":"affected","versionType":"git"},{"version":"42f39036cda808d3de243192a2cf5125f12f3047","lessThan":"4764953c4b47585eb72797b216b63a831dc0c7e6","status":"affected","versionType":"git"},{"version":"42f39036cda808d3de243192a2cf5125f12f3047","lessThan":"4510d140524ca7d6e772db962e013f26f09a63b1","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_mirred.c"],"versions":[{"version":"6.8","status":"affected"},{"version":"0","lessThan":"6.8","status":"unaffected","versionType":"semver"},{"version":"6.12.91","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.33","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.10","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":"6.8","versionEndExcluding":"6.12.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/8fda5174286119addd28473fb2ec5bdf521c05a8"},{"url":"https://git.kernel.org/stable/c/7db3e4e03032261b1b519341123fc30d995478ca"},{"url":"https://git.kernel.org/stable/c/4764953c4b47585eb72797b216b63a831dc0c7e6"},{"url":"https://git.kernel.org/stable/c/4510d140524ca7d6e772db962e013f26f09a63b1"}],"title":"net/sched: act_mirred: fix wrong device for mac_header_xmit check in tcf_blockcast_redir","x_generator":{"engine":"bippy-1.2.0"}}}}