CVE ID : CVE-2026-23011<\/p>\n
Published : Jan. 25, 2026, 3:15 p.m. | 1\u00a0hour, 46\u00a0minutes ago<\/p>\n
Description : In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
ipv4: ip_gre: make ipgre_header() robust<\/p>\n
Analog to commit db5b4e39c4e6 (“ip6_gre: make ip6gre_header() robust”)<\/p>\n
Over the years, syzbot found many ways to crash the kernel
\nin ipgre_header() [1].<\/p>\n
This involves team or bonding drivers ability to dynamically
\nchange their dev->needed_headroom and\/or dev->hard_header_len<\/p>\n
In 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 ipgre device.<\/p>\n[1]\nskbuff: skb_under_panic: text:ffffffff89ea3cb7 len:2030915468 put:2030915372 head:ffff888058b43000 data:ffff887fdfa6e194 tail:0x120 end:0x6c0 dev:team0
\n kernel BUG at net\/core\/skbuff.c:213 !
\nOops: invalid opcode: 0000 [#1] SMP KASAN PTI
\nCPU: 1 UID: 0 PID: 1322 Comm: kworker\/1:9 Not tainted syzkaller #0 PREEMPT(full)
\nHardware name: Google Google Compute Engine\/Google Compute Engine, BIOS Google 10\/25\/2025
\nWorkqueue: mld mld_ifc_work
\n RIP: 0010:skb_panic+0x157\/0x160 net\/core\/skbuff.c:213
\nCall Trace:<\/p>\n
skb_under_panic net\/core\/skbuff.c:223 [inline]\n skb_push+0xc3\/0xe0 net\/core\/skbuff.c:2641
\n ipgre_header+0x67\/0x290 net\/ipv4\/ip_gre.c:897
\n dev_hard_header include\/linux\/netdevice.h:3436 [inline]\n neigh_connected_output+0x286\/0x460 net\/core\/neighbour.c:1618
\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
\n process_one_work kernel\/workqueue.c:3257 [inline]\n process_scheduled_works+0xad1\/0x1770 kernel\/workqueue.c:3340
\n worker_thread+0x8a0\/0xda0 kernel\/workqueue.c:3421
\n kthread+0x711\/0x8a0 kernel\/kthread.c:463
\n ret_from_fork+0x510\/0xa50 arch\/x86\/kernel\/process.c:158
\n ret_from_fork_asm+0x1a\/0x30 arch\/x86\/entry\/entry_64.S:246<\/p>\n
Severity: 0.0 | NA<\/p>\n
Visit the link for more details, such as CVSS details, affected products, timeline, and more…\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"
CVE ID : CVE-2026-23011 Published : Jan. 25, 2026, 3:15 p.m. | 1\u00a0hour, 46\u00a0minutes ago Description : In the Linux kernel, the following vulnerability has been resolved: ipv4: ip_gre: make ipgre_header() robust Analog to commit db5b4e39c4e6 (“ip6_gre: make ip6gre_header() robust”) Over the years, syzbot found many ways to crash the kernel in ipgre_header() [1]. This …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-75809","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/75809","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=75809"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/75809\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=75809"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=75809"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=75809"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}