{"cve":"CVE-2024-26953","nvd":{"published":"2024-05-01T06:15:11.457","modified":"2026-10-30T13:17:24.180","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: esp: fix bad handling of pages from page_pool\n\nWhen the skb is reorganized during esp_output (!esp->inline), the pages\ncoming from the original skb fragments are supposed to be released back\nto the system through put_page. But if the skb fragment pages are\noriginating from a page_pool, calling put_page on them will trigger a\npage_pool leak which will eventually result in a crash.\n\nThis leak can be easily observed when using CONFIG_DEBUG_VM and doing\nipsec + gre (non offloaded) forwarding:\n\n  BUG: Bad page state in process ksoftirqd/16  pfn:1451b6\n  page:00000000de2b8d32 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1451b6000 pfn:0x1451b6\n  flags: 0x200000000000000(node=0|zone=2)\n  page_type: 0xffffffff()\n  raw: 0200000000000000 dead000000000040 ffff88810d23c000 0000000000000000\n  raw: 00000001451b6000 0000000000000001 00000000ffffffff 0000000000000000\n  page dumped because: page_pool leak\n  Modules linked in: ip_gre gre mlx5_ib mlx5_core xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink iptable_nat nf_nat xt_addrtype br_netfilter rpcrdma rdma_ucm ib_iser libiscsi scsi_transport_iscsi ib_umad rdma_cm ib_ipoib iw_cm ib_cm ib_uverbs ib_core overlay zram zsmalloc fuse [last unloaded: mlx5_core]\n  CPU: 16 PID: 96 Comm: ksoftirqd/16 Not tainted 6.8.0-rc4+ #22\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n  Call Trace:\n   <TASK>\n   dump_stack_lvl+0x36/0x50\n   bad_page+0x70/0xf0\n   free_unref_page_prepare+0x27a/0x460\n   free_unref_page+0x38/0x120\n   esp_ssg_unref.isra.0+0x15f/0x200\n   esp_output_tail+0x66d/0x780\n   esp_xmit+0x2c5/0x360\n   validate_xmit_xfrm+0x313/0x370\n   ? validate_xmit_skb+0x1d/0x330\n   validate_xmit_skb_list+0x4c/0x70\n   sch_direct_xmit+0x23e/0x350\n   __dev_queue_xmit+0x337/0xba0\n   ? nf_hook_slow+0x3f/0xd0\n   ip_finish_output2+0x25e/0x580\n   iptunnel_xmit+0x19b/0x240\n   ip_tunnel_xmit+0x5fb/0xb60\n   ipgre_xmit+0x14d/0x280 [ip_gre]\n   dev_hard_start_xmit+0xc3/0x1c0\n   __dev_queue_xmit+0x208/0xba0\n   ? nf_hook_slow+0x3f/0xd0\n   ip_finish_output2+0x1ca/0x580\n   ip_sublist_rcv_finish+0x32/0x40\n   ip_sublist_rcv+0x1b2/0x1f0\n   ? ip_rcv_finish_core.constprop.0+0x460/0x460\n   ip_list_rcv+0x103/0x130\n   __netif_receive_skb_list_core+0x181/0x1e0\n   netif_receive_skb_list_internal+0x1b3/0x2c0\n   napi_gro_receive+0xc8/0x200\n   gro_cell_poll+0x52/0x90\n   __napi_poll+0x25/0x1a0\n   net_rx_action+0x28e/0x300\n   __do_softirq+0xc3/0x276\n   ? sort_range+0x20/0x20\n   run_ksoftirqd+0x1e/0x30\n   smpboot_thread_fn+0xa6/0x130\n   kthread+0xcd/0x100\n   ? kthread_complete_and_exit+0x20/0x20\n   ret_from_fork+0x31/0x50\n   ? kthread_complete_and_exit+0x20/0x20\n   ret_from_fork_asm+0x11/0x20\n   </TASK>\n\nThe suggested fix is to introduce a new wrapper (skb_page_unref) that\ncovers page refcounting for page_pool pages as well.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/1abb20a5f4b02fb3020f88456fc1e6069b3cdc45","https://git.kernel.org/stable/c/21b989b62456a0e1eae9f464a5ca360a608625d1","https://git.kernel.org/stable/c/8291b4eac429c480386669444c6377573f5d8664","https://git.kernel.org/stable/c/c3198822c6cb9fb588e446540485669cc81c5d34","https://git.kernel.org/stable/c/f278ff9db67264715d0d50e3e75044f8b78990f4"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-30T13:47:47.119061695+00:00"},"epss":{"cve":"CVE-2024-26953","score":0.00662,"percentile":0.5163,"date":"2026-10-30"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}