{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-71098","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:30:19.650Z","datePublished":"2026-01-13T15:34:57.536Z","dateUpdated":"2026-05-11T21:54:42.469Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:54:42.469Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nip6_gre: make ip6gre_header() robust\n\nOver the years, syzbot found many ways to crash the kernel\nin ip6gre_header() [1].\n\nThis involves team or bonding drivers ability to dynamically\nchange their dev->needed_headroom and/or dev->hard_header_len\n\nIn this particular crash mld_newpack() allocated an skb\nwith a too small reserve/headroom, and by the time mld_sendpack()\nwas called, syzbot managed to attach an ip6gre device.\n\n[1]\nskbuff: skb_under_panic: text:ffffffff8a1d69a8 len:136 put:40 head:ffff888059bc7000 data:ffff888059bc6fe8 tail:0x70 end:0x6c0 dev:team0\n------------[ cut here ]------------\n kernel BUG at net/core/skbuff.c:213 !\n <TASK>\n  skb_under_panic net/core/skbuff.c:223 [inline]\n  skb_push+0xc3/0xe0 net/core/skbuff.c:2641\n  ip6gre_header+0xc8/0x790 net/ipv6/ip6_gre.c:1371\n  dev_hard_header include/linux/netdevice.h:3436 [inline]\n  neigh_connected_output+0x286/0x460 net/core/neighbour.c:1618\n  neigh_output include/net/neighbour.h:556 [inline]\n  ip6_finish_output2+0xfb3/0x1480 net/ipv6/ip6_output.c:136\n __ip6_finish_output net/ipv6/ip6_output.c:-1 [inline]\n  ip6_finish_output+0x234/0x7d0 net/ipv6/ip6_output.c:220\n  NF_HOOK_COND include/linux/netfilter.h:307 [inline]\n  ip6_output+0x340/0x550 net/ipv6/ip6_output.c:247\n  NF_HOOK+0x9e/0x380 include/linux/netfilter.h:318\n  mld_sendpack+0x8d4/0xe60 net/ipv6/mcast.c:1855\n  mld_send_cr net/ipv6/mcast.c:2154 [inline]\n  mld_ifc_work+0x83e/0xd60 net/ipv6/mcast.c:2693"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/ip6_gre.c"],"versions":[{"version":"c12b395a46646bab69089ce7016ac78177f6001f","lessThan":"17e7386234f740f3e7d5e58a47b5847ea34c3bc2","status":"affected","versionType":"git"},{"version":"c12b395a46646bab69089ce7016ac78177f6001f","lessThan":"41a1a3140aff295dee8063906f70a514548105e8","status":"affected","versionType":"git"},{"version":"c12b395a46646bab69089ce7016ac78177f6001f","lessThan":"adee129db814474f2f81207bd182bf343832a52e","status":"affected","versionType":"git"},{"version":"c12b395a46646bab69089ce7016ac78177f6001f","lessThan":"1717357007db150c2d703f13f5695460e960f26c","status":"affected","versionType":"git"},{"version":"c12b395a46646bab69089ce7016ac78177f6001f","lessThan":"5fe210533e3459197eabfdbf97327dacbdc04d60","status":"affected","versionType":"git"},{"version":"c12b395a46646bab69089ce7016ac78177f6001f","lessThan":"91a2b25be07ce1a7549ceebbe82017551d2eec92","status":"affected","versionType":"git"},{"version":"c12b395a46646bab69089ce7016ac78177f6001f","lessThan":"db5b4e39c4e63700c68a7e65fc4e1f1375273476","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/ipv6/ip6_gre.c"],"versions":[{"version":"3.7","status":"affected"},{"version":"0","lessThan":"3.7","status":"unaffected","versionType":"semver"},{"version":"5.10.248","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.198","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.160","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.120","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.64","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.4","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19","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":"3.7","versionEndExcluding":"5.10.248"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"5.15.198"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.1.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.6.120"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.12.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.18.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/17e7386234f740f3e7d5e58a47b5847ea34c3bc2"},{"url":"https://git.kernel.org/stable/c/41a1a3140aff295dee8063906f70a514548105e8"},{"url":"https://git.kernel.org/stable/c/adee129db814474f2f81207bd182bf343832a52e"},{"url":"https://git.kernel.org/stable/c/1717357007db150c2d703f13f5695460e960f26c"},{"url":"https://git.kernel.org/stable/c/5fe210533e3459197eabfdbf97327dacbdc04d60"},{"url":"https://git.kernel.org/stable/c/91a2b25be07ce1a7549ceebbe82017551d2eec92"},{"url":"https://git.kernel.org/stable/c/db5b4e39c4e63700c68a7e65fc4e1f1375273476"}],"title":"ip6_gre: make ip6gre_header() robust","x_generator":{"engine":"bippy-1.2.0"}}}}