{"id":"CVE-2024-26852","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/ipv6: avoid possible UAF in ip6_route_mpath_notify()\n\nsyzbot found another use-after-free in ip6_route_mpath_notify() [1]\n\nCommit f7225172f25a (\"net/ipv6: prevent u…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/ipv6: avoid possible UAF in ip6_route_mpath_notify()\n\nsyzbot found another use-after-free in ip6_route_mpath_notify() [1]\n\nCommit f7225172f25a (\"net/ipv6: prevent u…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.11, < 4.19.310","linux_kernel >= 4.20, < 5.4.272","linux_kernel >= 5.5, < 5.10.213","linux_kernel >= 5.11, < 5.15.152","linux_kernel >= 5.16, < 6.1.82","linux_kernel >= 6.2, < 6.6.22","linux_kernel >= 6.7, < 6.7.10","linux_kernel = 6.8","debian_linux = 10.0"],"patched":["linux_kernel 6.7.10"],"published":"2024-04-17","updated":"2026-10-15","sourceUpdated":"2026-10-15T01:17:25.643","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-26852","references":[{"url":"https://git.kernel.org/stable/c/31ea5bcc7d4cd1423de6be327a2c034725704136","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/394334fe2ae3b9f1e2332b873857e84cb28aac18","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/61b34f73cdbdb8eaf9ea12e9e2eb3b29716c4dda","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/664f9c647260cc9d68b4e31d9899530d89dd045e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/685f7d531264599b3f167f1e94bbd22f120e5fab","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/79ce2e54cc0ae366f45516c00bf1b19aa43e9abe","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cae3303257950d03ffec2df4a45e836f10d26c24","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ed883060c38721ed828061f6c0c30e5147326c9a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/31ea5bcc7d4cd1423de6be327a2c034725704136","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/394334fe2ae3b9f1e2332b873857e84cb28aac18","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/61b34f73cdbdb8eaf9ea12e9e2eb3b29716c4dda","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/664f9c647260cc9d68b4e31d9899530d89dd045e","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/685f7d531264599b3f167f1e94bbd22f120e5fab","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/79ce2e54cc0ae366f45516c00bf1b19aa43e9abe","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/cae3303257950d03ffec2df4a45e836f10d26c24","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/ed883060c38721ed828061f6c0c30e5147326c9a","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00269,"epssPercentile":0.18902,"ingestedAt":"2026-10-15T03:30:12.652Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2024-04-19T20:41:29.771297Z"},"slug":"CVE-2024-26852","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet/ipv6: avoid possible UAF in ip6_route_mpath_notify()\n\nsyzbot found another use-after-free in ip6_route_mpath_notify() [1]\n\nCommit f7225172f25a (\"net/ipv6: prevent use after free in\nip6_route_mpath_notify\") was not able to fix the root cause.\n\nWe need to defer the fib6_info_release() calls after\nip6_route_mpath_notify(), in the cleanup phase.\n\n[1]\nBUG: KASAN: slab-use-after-free in rt6_fill_node+0x1460/0x1ac0\nRead of size 4 at addr ffff88809a07fc64 by task syz-executor.2/23037\n\nCPU: 0 PID: 23037 Comm: syz-executor.2 Not tainted 6.8.0-rc4-syzkaller-01035-gea7f3cfaa588 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024\nCall Trace:\n <TASK>\n  __dump_stack lib/dump_stack.c:88 [inline]\n  dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106\n  print_address_description mm/kasan/report.c:377 [inline]\n  print_report+0x167/0x540 mm/kasan/report.c:488\n  kasan_report+0x142/0x180 mm/kasan/report.c:601\n rt6_fill_node+0x1460/0x1ac0\n  inet6_rt_notify+0x13b/0x290 net/ipv6/route.c:6184\n  ip6_route_mpath_notify net/ipv6/route.c:5198 [inline]\n  ip6_route_multipath_add net/ipv6/route.c:5404 [inline]\n  inet6_rtm_newroute+0x1d0f/0x2300 net/ipv6/route.c:5517\n  rtnetlink_rcv_msg+0x885/0x1040 net/core/rtnetlink.c:6597\n  netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543\n  netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]\n  netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367\n  netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908\n  sock_sendmsg_nosec net/socket.c:730 [inline]\n  __sock_sendmsg+0x221/0x270 net/socket.c:745\n  ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584\n  ___sys_sendmsg net/socket.c:2638 [inline]\n  __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667\n do_syscall_64+0xf9/0x240\n entry_SYSCALL_64_after_hwframe+0x6f/0x77\nRIP: 0033:0x7f73dd87dda9\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f73de6550c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e\nRAX: ffffffffffffffda RBX: 00007f73dd9ac050 RCX: 00007f73dd87dda9\nRDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000005\nRBP: 00007f73dd8ca47a R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 000000000000006e R14: 00007f73dd9ac050 R15: 00007ffdbdeb7858\n </TASK>\n\nAllocated by task 23037:\n  kasan_save_stack mm/kasan/common.c:47 [inline]\n  kasan_save_track+0x3f/0x80 mm/kasan/common.c:68\n  poison_kmalloc_redzone mm/kasan/common.c:372 [inline]\n  __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:389\n  kasan_kmalloc include/linux/kasan.h:211 [inline]\n  __do_kmalloc_node mm/slub.c:3981 [inline]\n  __kmalloc+0x22e/0x490 mm/slub.c:3994\n  kmalloc include/linux/slab.h:594 [inline]\n  kzalloc include/linux/slab.h:711 [inline]\n  fib6_info_alloc+0x2e/0xf0 net/ipv6/ip6_fib.c:155\n  ip6_route_info_create+0x445/0x12b0 net/ipv6/route.c:3758\n  ip6_route_multipath_add net/ipv6/route.c:5298 [inline]\n  inet6_rtm_newroute+0x744/0x2300 net/ipv6/route.c:5517\n  rtnetlink_rcv_msg+0x885/0x1040 net/core/rtnetlink.c:6597\n  netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543\n  netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]\n  netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367\n  netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908\n  sock_sendmsg_nosec net/socket.c:730 [inline]\n  __sock_sendmsg+0x221/0x270 net/socket.c:745\n  ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584\n  ___sys_sendmsg net/socket.c:2638 [inline]\n  __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667\n do_syscall_64+0xf9/0x240\n entry_SYSCALL_64_after_hwframe+0x6f/0x77\n\nFreed by task 16:\n  kasan_save_stack mm/kasan/common.c:47 [inline]\n  kasan_save_track+0x3f/0x80 mm/kasan/common.c:68\n  kasan_save_free_info+0x4e/0x60 mm/kasan/generic.c:640\n  poison_slab_object+0xa6/0xe0 m\n---truncated---\n\n## Affected\n\n- `linux_kernel >= 4.11, < 4.19.310`\n- `linux_kernel >= 4.20, < 5.4.272`\n- `linux_kernel >= 5.5, < 5.10.213`\n- `linux_kernel >= 5.11, < 5.15.152`\n- `linux_kernel >= 5.16, < 6.1.82`\n- `linux_kernel >= 6.2, < 6.6.22`\n- `linux_kernel >= 6.7, < 6.7.10`\n- `linux_kernel = 6.8`\n- `debian_linux = 10.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.7.10`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}