CVE-2026-72248

CVE CVE-2026-72248EUVD EUVD-2026-59147Published 2026-08-15T05:54:36.000ZLast changed 2026-08-17T05:41:59.000ZCVSS 9.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: support IPIP tunnel with direct xmit The combination of IPIP tunnel with direct xmit, eg. bridge device, breaks because no dst_entry is provided to check the skb headroom and to set the iph->frag_off field. This leads to invalid dst usage and can trigger a crash in the tunnel transmit path. Fix this by moving dst_cache and dst_cookie out of the runtime union so that they can be shared by neighbour, xfrm, and direct tunnel flows. For FLOW_OFFLOAD_XMIT_DIRECT tuples carrying tunnel metadata, preserve route state in these shared fields and release it through the common dst release path. Since dst_entry is now available to the three supported xmit modes and dst_release() already deals with NULL dst, remove the xmit type check in nft_flow_dst_release(). Moreover, skip the check if the dst entry is NULL in nf_flow_dst_check() which is now the case for the direct xmit case. Based on patch from Rein Wei <n05ec@lzu.edu.cn>.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.2; d30301ba4b07ac92eb38353a111833b009003170 <0880c4ed122d0cddc9f29a2b28f055d1f24f0fca; patch: 7.1.5; d30301ba4b07ac92eb38353a111833b009003170 <fa7395c02d95e51bad2952325d2d6503bfbad437; patch: 0; 6.19

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Carried in the product catalogue

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Linux — Linux

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