CVE-2025-21720 (GCVE-0-2025-21720)

Vulnerability from cvelistv5 – Published: 2025-02-27 02:07 – Updated: 2026-05-11 21:05
VLAI
Title
xfrm: delete intermediate secpath entry in packet offload mode
Summary
In the Linux kernel, the following vulnerability has been resolved: xfrm: delete intermediate secpath entry in packet offload mode Packets handled by hardware have added secpath as a way to inform XFRM core code that this path was already handled. That secpath is not needed at all after policy is checked and it is removed later in the stack. However, in the case of IP forwarding is enabled (/proc/sys/net/ipv4/ip_forward), that secpath is not removed and packets which already were handled are reentered to the driver TX path with xfrm_offload set. The following kernel panic is observed in mlx5 in such case: mlx5_core 0000:04:00.0 enp4s0f0np0: Link up mlx5_core 0000:04:00.1 enp4s0f1np1: Link up Initializing XFRM netlink socket IPsec XFRM device driver BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 0 P4D 0 Oops: Oops: 0010 [#1] PREEMPT SMP CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-rc1-alex #3 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffb87380003800 EFLAGS: 00010206 RAX: ffff8df004e02600 RBX: ffffb873800038d8 RCX: 00000000ffff98cf RDX: ffff8df00733e108 RSI: ffff8df00521fb80 RDI: ffff8df001661f00 RBP: ffffb87380003850 R08: ffff8df013980000 R09: 0000000000000010 R10: 0000000000000002 R11: 0000000000000002 R12: ffff8df001661f00 R13: ffff8df00521fb80 R14: ffff8df00733e108 R15: ffff8df011faf04e FS: 0000000000000000(0000) GS:ffff8df46b800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000106384000 CR4: 0000000000350ef0 Call Trace: <IRQ> ? show_regs+0x63/0x70 ? __die_body+0x20/0x60 ? __die+0x2b/0x40 ? page_fault_oops+0x15c/0x550 ? do_user_addr_fault+0x3ed/0x870 ? exc_page_fault+0x7f/0x190 ? asm_exc_page_fault+0x27/0x30 mlx5e_ipsec_handle_tx_skb+0xe7/0x2f0 [mlx5_core] mlx5e_xmit+0x58e/0x1980 [mlx5_core] ? __fib_lookup+0x6a/0xb0 dev_hard_start_xmit+0x82/0x1d0 sch_direct_xmit+0xfe/0x390 __dev_queue_xmit+0x6d8/0xee0 ? __fib_lookup+0x6a/0xb0 ? internal_add_timer+0x48/0x70 ? mod_timer+0xe2/0x2b0 neigh_resolve_output+0x115/0x1b0 __neigh_update+0x26a/0xc50 neigh_update+0x14/0x20 arp_process+0x2cb/0x8e0 ? __napi_build_skb+0x5e/0x70 arp_rcv+0x11e/0x1c0 ? dev_gro_receive+0x574/0x820 __netif_receive_skb_list_core+0x1cf/0x1f0 netif_receive_skb_list_internal+0x183/0x2a0 napi_complete_done+0x76/0x1c0 mlx5e_napi_poll+0x234/0x7a0 [mlx5_core] __napi_poll+0x2d/0x1f0 net_rx_action+0x1a6/0x370 ? atomic_notifier_call_chain+0x3b/0x50 ? irq_int_handler+0x15/0x20 [mlx5_core] handle_softirqs+0xb9/0x2f0 ? handle_irq_event+0x44/0x60 irq_exit_rcu+0xdb/0x100 common_interrupt+0x98/0xc0 </IRQ> <TASK> asm_common_interrupt+0x27/0x40 RIP: 0010:pv_native_safe_halt+0xb/0x10 Code: 09 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 22 0f 1f 84 00 00 00 00 00 90 eb 07 0f 00 2d 7f e9 36 00 fb 40 00 83 ff 07 77 21 89 ff ff 24 fd 88 3d a1 bd 0f 21 f8 RSP: 0018:ffffffffbe603de8 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000f92f46680 RDX: 0000000000000037 RSI: 00000000ffffffff RDI: 00000000000518d4 RBP: ffffffffbe603df0 R08: 000000cd42e4dffb R09: ffffffffbe603d70 R10: 0000004d80d62680 R11: 0000000000000001 R12: ffffffffbe60bf40 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffffbe60aff8 ? default_idle+0x9/0x20 arch_cpu_idle+0x9/0x10 default_idle_call+0x29/0xf0 do_idle+0x1f2/0x240 cpu_startup_entry+0x2c/0x30 rest_init+0xe7/0x100 start_kernel+0x76b/0xb90 x86_64_start_reservations+0x18/0x30 x86_64_start_kernel+0xc0/0x110 ? setup_ghcb+0xe/0x130 common_startup_64+0x13e/0x141 </TASK> Modules linked in: esp4_offload esp4 xfrm_interface xfrm6_tunnel tunnel4 tunnel6 xfrm_user xfrm_algo binf ---truncated---
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5958372ddf628fe6f4c3e49425734ad32fcfb13c , < c6e1b2cac24b2a4d1dd472071021bf00c26450eb (git)
Affected: 5958372ddf628fe6f4c3e49425734ad32fcfb13c , < 6945701ca1572f81bc9bb46f624b02eabb3eaf3e (git)
Affected: 5958372ddf628fe6f4c3e49425734ad32fcfb13c , < 981ad4c882096e7375b8c2181dd4c3ee58ea5bae (git)
Affected: 5958372ddf628fe6f4c3e49425734ad32fcfb13c , < 600258d555f0710b9c47fb78d2d80a4aecd608cc (git)
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Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 6.6.76 , ≤ 6.6.* (semver)
Unaffected: 6.12.13 , ≤ 6.12.* (semver)
Unaffected: 6.13.2 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/xfrm.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c6e1b2cac24b2a4d1dd472071021bf00c26450eb",
              "status": "affected",
              "version": "5958372ddf628fe6f4c3e49425734ad32fcfb13c",
              "versionType": "git"
            },
            {
              "lessThan": "6945701ca1572f81bc9bb46f624b02eabb3eaf3e",
              "status": "affected",
              "version": "5958372ddf628fe6f4c3e49425734ad32fcfb13c",
              "versionType": "git"
            },
            {
              "lessThan": "981ad4c882096e7375b8c2181dd4c3ee58ea5bae",
              "status": "affected",
              "version": "5958372ddf628fe6f4c3e49425734ad32fcfb13c",
              "versionType": "git"
            },
            {
              "lessThan": "600258d555f0710b9c47fb78d2d80a4aecd608cc",
              "status": "affected",
              "version": "5958372ddf628fe6f4c3e49425734ad32fcfb13c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/net/xfrm.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.76",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.76",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.13",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.2",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: delete intermediate secpath entry in packet offload mode\n\nPackets handled by hardware have added secpath as a way to inform XFRM\ncore code that this path was already handled. That secpath is not needed\nat all after policy is checked and it is removed later in the stack.\n\nHowever, in the case of IP forwarding is enabled (/proc/sys/net/ipv4/ip_forward),\nthat secpath is not removed and packets which already were handled are reentered\nto the driver TX path with xfrm_offload set.\n\nThe following kernel panic is observed in mlx5 in such case:\n\n mlx5_core 0000:04:00.0 enp4s0f0np0: Link up\n mlx5_core 0000:04:00.1 enp4s0f1np1: Link up\n Initializing XFRM netlink socket\n IPsec XFRM device driver\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n #PF: supervisor instruction fetch in kernel mode\n #PF: error_code(0x0010) - not-present page\n PGD 0 P4D 0\n Oops: Oops: 0010 [#1] PREEMPT SMP\n CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-rc1-alex #3\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 04/01/2014\n RIP: 0010:0x0\n Code: Unable to access opcode bytes at 0xffffffffffffffd6.\n RSP: 0018:ffffb87380003800 EFLAGS: 00010206\n RAX: ffff8df004e02600 RBX: ffffb873800038d8 RCX: 00000000ffff98cf\n RDX: ffff8df00733e108 RSI: ffff8df00521fb80 RDI: ffff8df001661f00\n RBP: ffffb87380003850 R08: ffff8df013980000 R09: 0000000000000010\n R10: 0000000000000002 R11: 0000000000000002 R12: ffff8df001661f00\n R13: ffff8df00521fb80 R14: ffff8df00733e108 R15: ffff8df011faf04e\n FS:  0000000000000000(0000) GS:ffff8df46b800000(0000) knlGS:0000000000000000\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: ffffffffffffffd6 CR3: 0000000106384000 CR4: 0000000000350ef0\n Call Trace:\n  \u003cIRQ\u003e\n  ? show_regs+0x63/0x70\n  ? __die_body+0x20/0x60\n  ? __die+0x2b/0x40\n  ? page_fault_oops+0x15c/0x550\n  ? do_user_addr_fault+0x3ed/0x870\n  ? exc_page_fault+0x7f/0x190\n  ? asm_exc_page_fault+0x27/0x30\n  mlx5e_ipsec_handle_tx_skb+0xe7/0x2f0 [mlx5_core]\n  mlx5e_xmit+0x58e/0x1980 [mlx5_core]\n  ? __fib_lookup+0x6a/0xb0\n  dev_hard_start_xmit+0x82/0x1d0\n  sch_direct_xmit+0xfe/0x390\n  __dev_queue_xmit+0x6d8/0xee0\n  ? __fib_lookup+0x6a/0xb0\n  ? internal_add_timer+0x48/0x70\n  ? mod_timer+0xe2/0x2b0\n  neigh_resolve_output+0x115/0x1b0\n  __neigh_update+0x26a/0xc50\n  neigh_update+0x14/0x20\n  arp_process+0x2cb/0x8e0\n  ? __napi_build_skb+0x5e/0x70\n  arp_rcv+0x11e/0x1c0\n  ? dev_gro_receive+0x574/0x820\n  __netif_receive_skb_list_core+0x1cf/0x1f0\n  netif_receive_skb_list_internal+0x183/0x2a0\n  napi_complete_done+0x76/0x1c0\n  mlx5e_napi_poll+0x234/0x7a0 [mlx5_core]\n  __napi_poll+0x2d/0x1f0\n  net_rx_action+0x1a6/0x370\n  ? atomic_notifier_call_chain+0x3b/0x50\n  ? irq_int_handler+0x15/0x20 [mlx5_core]\n  handle_softirqs+0xb9/0x2f0\n  ? handle_irq_event+0x44/0x60\n  irq_exit_rcu+0xdb/0x100\n  common_interrupt+0x98/0xc0\n  \u003c/IRQ\u003e\n  \u003cTASK\u003e\n  asm_common_interrupt+0x27/0x40\n RIP: 0010:pv_native_safe_halt+0xb/0x10\n Code: 09 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 22\n 0f 1f 84 00 00 00 00 00 90 eb 07 0f 00 2d 7f e9 36 00 fb\n40 00 83 ff 07 77 21 89 ff ff 24 fd 88 3d a1 bd 0f 21 f8\n RSP: 0018:ffffffffbe603de8 EFLAGS: 00000202\n RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000f92f46680\n RDX: 0000000000000037 RSI: 00000000ffffffff RDI: 00000000000518d4\n RBP: ffffffffbe603df0 R08: 000000cd42e4dffb R09: ffffffffbe603d70\n R10: 0000004d80d62680 R11: 0000000000000001 R12: ffffffffbe60bf40\n R13: 0000000000000000 R14: 0000000000000000 R15: ffffffffbe60aff8\n  ? default_idle+0x9/0x20\n  arch_cpu_idle+0x9/0x10\n  default_idle_call+0x29/0xf0\n  do_idle+0x1f2/0x240\n  cpu_startup_entry+0x2c/0x30\n  rest_init+0xe7/0x100\n  start_kernel+0x76b/0xb90\n  x86_64_start_reservations+0x18/0x30\n  x86_64_start_kernel+0xc0/0x110\n  ? setup_ghcb+0xe/0x130\n  common_startup_64+0x13e/0x141\n  \u003c/TASK\u003e\n Modules linked in: esp4_offload esp4 xfrm_interface\nxfrm6_tunnel tunnel4 tunnel6 xfrm_user xfrm_algo binf\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:05:07.383Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c6e1b2cac24b2a4d1dd472071021bf00c26450eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/6945701ca1572f81bc9bb46f624b02eabb3eaf3e"
        },
        {
          "url": "https://git.kernel.org/stable/c/981ad4c882096e7375b8c2181dd4c3ee58ea5bae"
        },
        {
          "url": "https://git.kernel.org/stable/c/600258d555f0710b9c47fb78d2d80a4aecd608cc"
        }
      ],
      "title": "xfrm: delete intermediate secpath entry in packet offload mode",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21720",
    "datePublished": "2025-02-27T02:07:29.179Z",
    "dateReserved": "2024-12-29T08:45:45.753Z",
    "dateUpdated": "2026-05-11T21:05:07.383Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-21720",
      "date": "2026-07-14",
      "epss": "0.00171",
      "percentile": "0.06725"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21720\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-27T02:15:15.683\",\"lastModified\":\"2026-06-17T08:44:06.980\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nxfrm: delete intermediate secpath entry in packet offload mode\\n\\nPackets handled by hardware have added secpath as a way to inform XFRM\\ncore code that this path was already handled. That secpath is not needed\\nat all after policy is checked and it is removed later in the stack.\\n\\nHowever, in the case of IP forwarding is enabled (/proc/sys/net/ipv4/ip_forward),\\nthat secpath is not removed and packets which already were handled are reentered\\nto the driver TX path with xfrm_offload set.\\n\\nThe following kernel panic is observed in mlx5 in such case:\\n\\n mlx5_core 0000:04:00.0 enp4s0f0np0: Link up\\n mlx5_core 0000:04:00.1 enp4s0f1np1: Link up\\n Initializing XFRM netlink socket\\n IPsec XFRM device driver\\n BUG: kernel NULL pointer dereference, address: 0000000000000000\\n #PF: supervisor instruction fetch in kernel mode\\n #PF: error_code(0x0010) - not-present page\\n PGD 0 P4D 0\\n Oops: Oops: 0010 [#1] PREEMPT SMP\\n CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-rc1-alex #3\\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 04/01/2014\\n RIP: 0010:0x0\\n Code: Unable to access opcode bytes at 0xffffffffffffffd6.\\n RSP: 0018:ffffb87380003800 EFLAGS: 00010206\\n RAX: ffff8df004e02600 RBX: ffffb873800038d8 RCX: 00000000ffff98cf\\n RDX: ffff8df00733e108 RSI: ffff8df00521fb80 RDI: ffff8df001661f00\\n RBP: ffffb87380003850 R08: ffff8df013980000 R09: 0000000000000010\\n R10: 0000000000000002 R11: 0000000000000002 R12: ffff8df001661f00\\n R13: ffff8df00521fb80 R14: ffff8df00733e108 R15: ffff8df011faf04e\\n FS:  0000000000000000(0000) GS:ffff8df46b800000(0000) knlGS:0000000000000000\\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: ffffffffffffffd6 CR3: 0000000106384000 CR4: 0000000000350ef0\\n Call Trace:\\n  \u003cIRQ\u003e\\n  ? show_regs+0x63/0x70\\n  ? __die_body+0x20/0x60\\n  ? __die+0x2b/0x40\\n  ? page_fault_oops+0x15c/0x550\\n  ? do_user_addr_fault+0x3ed/0x870\\n  ? exc_page_fault+0x7f/0x190\\n  ? asm_exc_page_fault+0x27/0x30\\n  mlx5e_ipsec_handle_tx_skb+0xe7/0x2f0 [mlx5_core]\\n  mlx5e_xmit+0x58e/0x1980 [mlx5_core]\\n  ? __fib_lookup+0x6a/0xb0\\n  dev_hard_start_xmit+0x82/0x1d0\\n  sch_direct_xmit+0xfe/0x390\\n  __dev_queue_xmit+0x6d8/0xee0\\n  ? __fib_lookup+0x6a/0xb0\\n  ? internal_add_timer+0x48/0x70\\n  ? mod_timer+0xe2/0x2b0\\n  neigh_resolve_output+0x115/0x1b0\\n  __neigh_update+0x26a/0xc50\\n  neigh_update+0x14/0x20\\n  arp_process+0x2cb/0x8e0\\n  ? __napi_build_skb+0x5e/0x70\\n  arp_rcv+0x11e/0x1c0\\n  ? dev_gro_receive+0x574/0x820\\n  __netif_receive_skb_list_core+0x1cf/0x1f0\\n  netif_receive_skb_list_internal+0x183/0x2a0\\n  napi_complete_done+0x76/0x1c0\\n  mlx5e_napi_poll+0x234/0x7a0 [mlx5_core]\\n  __napi_poll+0x2d/0x1f0\\n  net_rx_action+0x1a6/0x370\\n  ? atomic_notifier_call_chain+0x3b/0x50\\n  ? irq_int_handler+0x15/0x20 [mlx5_core]\\n  handle_softirqs+0xb9/0x2f0\\n  ? handle_irq_event+0x44/0x60\\n  irq_exit_rcu+0xdb/0x100\\n  common_interrupt+0x98/0xc0\\n  \u003c/IRQ\u003e\\n  \u003cTASK\u003e\\n  asm_common_interrupt+0x27/0x40\\n RIP: 0010:pv_native_safe_halt+0xb/0x10\\n Code: 09 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 22\\n 0f 1f 84 00 00 00 00 00 90 eb 07 0f 00 2d 7f e9 36 00 fb\\n40 00 83 ff 07 77 21 89 ff ff 24 fd 88 3d a1 bd 0f 21 f8\\n RSP: 0018:ffffffffbe603de8 EFLAGS: 00000202\\n RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000f92f46680\\n RDX: 0000000000000037 RSI: 00000000ffffffff RDI: 00000000000518d4\\n RBP: ffffffffbe603df0 R08: 000000cd42e4dffb R09: ffffffffbe603d70\\n R10: 0000004d80d62680 R11: 0000000000000001 R12: ffffffffbe60bf40\\n R13: 0000000000000000 R14: 0000000000000000 R15: ffffffffbe60aff8\\n  ? default_idle+0x9/0x20\\n  arch_cpu_idle+0x9/0x10\\n  default_idle_call+0x29/0xf0\\n  do_idle+0x1f2/0x240\\n  cpu_startup_entry+0x2c/0x30\\n  rest_init+0xe7/0x100\\n  start_kernel+0x76b/0xb90\\n  x86_64_start_reservations+0x18/0x30\\n  x86_64_start_kernel+0xc0/0x110\\n  ? setup_ghcb+0xe/0x130\\n  common_startup_64+0x13e/0x141\\n  \u003c/TASK\u003e\\n Modules linked in: esp4_offload esp4 xfrm_interface\\nxfrm6_tunnel tunnel4 tunnel6 xfrm_user xfrm_algo binf\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: xfrm: eliminar entrada secpath intermedia en modo de descarga de paquetes Los paquetes manejados por hardware han agregado secpath como una forma de informar al c\u00f3digo central de XFRM que esta ruta ya fue manejada. Ese secpath no es necesario en absoluto despu\u00e9s de que se verifica la pol\u00edtica y se elimina m\u00e1s adelante en la pila. Sin embargo, en el caso de que el reenv\u00edo de IP est\u00e9 habilitado (/proc/sys/net/ipv4/ip_forward), ese secpath no se elimina y los paquetes que ya fueron manejados se reingresan a la ruta TX del controlador con xfrm_offload establecido. En este caso, se observa el siguiente p\u00e1nico del kernel en mlx5: mlx5_core 0000:04:00.0 enp4s0f0np0: Enlace activo mlx5_core 0000:04:00.1 enp4s0f1np1: Enlace activo Inicializando socket de enlace de red XFRM Controlador de dispositivo XFRM IPsec ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000000 #PF: obtenci\u00f3n de instrucci\u00f3n de supervisor en modo kernel #PF: error_code(0x0010) - p\u00e1gina no presente PGD 0 P4D 0 Oops: Oops: 0010 [#1] PREEMPT SMP CPU: 0 UID: 0 PID: 0 Comm: swapper/0 No contaminado 6.13.0-rc1-alex #3 Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 01/04/2014 RIP: 0010:0x0 C\u00f3digo: No se puede acceder a los bytes del c\u00f3digo de operaci\u00f3n en 0xffffffffffffffd6. RSP: 0018:ffffb87380003800 EFLAGS: 00010206 RAX: ffff8df004e02600 RBX: ffffb873800038d8 RCX: 00000000ffff98cf RDX: ffff8df00733e108 RSI: ffff8df00521fb80 RDI: ffff8df001661f00 RBP: ffffb87380003850 R08: ffff8df013980000 R09: 0000000000000010 R10: 0000000000000002 R11: 0000000000000002 R12: ffff8df001661f00 R13: ffff8df00521fb80 R14: ffff8df00733e108 R15: ffff8df011faf04e FS: 000000000000000(0000) GS:ffff8df46b800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000080050033 CR2: ffffffffffffffd6 CR3: 0000000106384000 CR4: 0000000000350ef0 Rastreo de llamadas:  ? show_regs+0x63/0x70 ? __die_body+0x20/0x60 ? __die+0x2b/0x40 ? page_fault_oops+0x15c/0x550 ? do_user_addr_fault+0x3ed/0x870 ? exc_page_fault+0x7f/0x190 ? asm_exc_page_fault+0x27/0x30 mlx5e_ipsec_handle_tx_skb+0xe7/0x2f0 [mlx5_core] mlx5e_xmit+0x58e/0x1980 [mlx5_core] ? __fib_lookup+0x6a/0xb0 dev_hard_start_xmit+0x82/0x1d0 sch_direct_xmit+0xfe/0x390 __dev_queue_xmit+0x6d8/0xee0 ? __fib_lookup+0x6a/0xb0 ? temporizador_de_adici\u00f3n_interna+0x48/0x70 ? temporizador_mod+0xe2/0x2b0 salida_de_resoluci\u00f3n_vecina+0x115/0x1b0 __neigh_update+0x26a/0xc50 neigh_update+0x14/0x20 proceso_arp+0x2cb/0x8e0 ? __napi_build_skb+0x5e/0x70 arp_rcv+0x11e/0x1c0 ? cadena_de_llamadas_del_notificador_at\u00f3mico+0x3b/0x50 ? manejador_irq_int+0x15/0x20 [mlx5_core] manejador_softirqs+0xb9/0x2f0 ?  asm_common_interrupt+0x27/0x40 RIP: 0010:pv_native_safe_halt+0xb/0x10 C\u00f3digo: 09 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 22 0f 1f 84 00 00 00 00 00 90 eb 07 0f 00 2d 7f e9 36 00 fb 40 00 83 ff 07 77 21 89 ff ff 24 fd 88 3d a1 bd 0f 21 f8 RSP: 0018:ffffffffbe603de8 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 000000000000000 RCX: 0000000f92f46680 RDX: 0000000000000037 RSI: 00000000ffffffff RDI: 00000000000518d4 RBP: ffffffffbe603df0 R08: 000000cd42e4dffb R09: ffffffffbe603d70 R10: 0000004d80d62680 R11: 00000000000000001 R12: ffffffffbe60bf40 R13: 0000000000000000 R14: 00000000000000000 R15: ffffffffbe60aff8 ? setup_ghcb+0xe/0x130 common_startup_64+0x13e/0x141  M\u00f3dulos vinculados en: esp4_offload esp4 xfrm_interface xfrm6_tunnel tunnel4 tunnel6 xfrm_user xfrm_algo binf ---truncado---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"include/net/xfrm.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5958372ddf628fe6f4c3e49425734ad32fcfb13c\",\"lessThan\":\"c6e1b2cac24b2a4d1dd472071021bf00c26450eb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5958372ddf628fe6f4c3e49425734ad32fcfb13c\",\"lessThan\":\"6945701ca1572f81bc9bb46f624b02eabb3eaf3e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5958372ddf628fe6f4c3e49425734ad32fcfb13c\",\"lessThan\":\"981ad4c882096e7375b8c2181dd4c3ee58ea5bae\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5958372ddf628fe6f4c3e49425734ad32fcfb13c\",\"lessThan\":\"600258d555f0710b9c47fb78d2d80a4aecd608cc\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"include/net/xfrm.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.2\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.2\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.76\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.13\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.13.2\",\"lessThanOrEqual\":\"6.13.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.14\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.76\",\"matchCriteriaId\":\"A6D70701-9CB6-4222-A957-00A419878993\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.13\",\"matchCriteriaId\":\"2897389C-A8C3-4D69-90F2-E701B3D66373\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.13.2\",\"matchCriteriaId\":\"6D4116B1-1BFD-4F23-BA84-169CC05FC5A3\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/600258d555f0710b9c47fb78d2d80a4aecd608cc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6945701ca1572f81bc9bb46f624b02eabb3eaf3e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/981ad4c882096e7375b8c2181dd4c3ee58ea5bae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c6e1b2cac24b2a4d1dd472071021bf00c26450eb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:18:58+00:00",
      "cve": "CVE-2025-21720",
      "id": "CVE-2025-21720",
      "initial_release_date": "2025-02-27T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: xfrm: delete intermediate secpath entry in packet offload mode",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-21720.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.