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CVE-2026-68420 (GCVE-0-2026-68420)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:04 – Updated: 2026-08-17 05:05
VLAI
Title
xfrm: reject optional IPTFS templates in outbound policies
Summary
In the Linux kernel, the following vulnerability has been resolved: xfrm: reject optional IPTFS templates in outbound policies syzbot reported a stack-out-of-bounds read in xfrm_state_find() which flows from xfrm_tmpl_resolve_one(). Commit 3d776e31c841 ("xfrm: Reject optional tunnel/BEET mode templates in outbound policies") disallowed optional tunnel and BEET in outbound policies to prevent this. Later when IPTFS added, it was not covered by that fix and can still trigger the out-of-bounds read; Extend the check to disallow optional IPTFS in outbound policies as well. IPTFS should be identical to tunnel mode. IN and FWD policies are not affected: xfrm_tmpl_resolve_one() is only reachable via the outbound path. Reproducer, before: ip link add dummy0 type dummy ip link set dummy0 up ip addr add 10.1.1.1/24 dev dummy0 ip xfrm policy add src 10.1.1.1/32 dst 10.1.1.2/32 dir out tmpl src fc00::dead:1 dst fc00::dead:2 proto esp reqid 1 mode iptfs level use tmpl src fc00::dead:1 dst fc00::dead:2 proto esp reqid 2 mode transport ping -W 1 -c 1 10.1.1.2 PING 10.1.1.2 (10.1.1.2) 56(84) bytes of data. [ 64.168420] ================================================================== [ 64.169977] BUG: KASAN: stack-out-of-bounds in __xfrm6_addr_hash+0x11e/0x170 [ 64.169977] Read of size 4 at addr ffff88800e1ffd20 by task ping/2844 [ 64.169977] CPU: 2 UID: 0 PID: 2844 Comm: ping Not tainted 7.1.0-rc7-00180-geb23b588430a #98 PREEMPT(full) [ 64.169977] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 64.169977] Call Trace: [ 64.169977] <TASK> [ 64.169977] dump_stack_lvl+0x47/0x70 [ 64.169977] ? __xfrm6_addr_hash+0x11e/0x170 [ 64.169977] print_report+0x152/0x4b0 [ 64.169977] ? ksys_mmap_pgoff+0x6d/0xa0 [ 64.169977] ? entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 64.169977] ? rcu_read_unlock_sched+0xa/0x20 [ 64.169977] ? __virt_addr_valid+0x21b/0x230 [ 64.169977] ? __xfrm6_addr_hash+0x11e/0x170 [ 64.169977] kasan_report+0xa8/0xd0 [ 64.169977] ? __xfrm6_addr_hash+0x11e/0x170 [ 64.169977] __xfrm6_addr_hash+0x11e/0x170 [ 64.169977] __xfrm_dst_hash+0x24/0xc0 [ 64.169977] xfrm_state_find+0xa2d/0x2f90 [ 64.169977] ? __pfx_xfrm_state_find+0x10/0x10 [ 64.169977] ? __pfx_ftrace_graph_ret_addr+0x10/0x10 [ 64.169977] ? __pfx_ftrace_graph_ret_addr+0x10/0x10 [ 64.169977] xfrm_tmpl_resolve_one+0x210/0x570 [ 64.169977] ? __pfx_xfrm_tmpl_resolve_one+0x10/0x10 [ 64.169977] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 64.169977] ? kernel_text_address+0x5b/0x80 [ 64.169977] ? __kernel_text_address+0xe/0x30 [ 64.169977] ? unwind_get_return_address+0x5e/0x90 [ 64.169977] ? arch_stack_walk+0x8c/0xe0 [ 64.169977] xfrm_tmpl_resolve+0x130/0x200 [ 64.169977] ? __pfx_xfrm_tmpl_resolve+0x10/0x10 [ 64.169977] ? __pfx_xfrm_policy_inexact_lookup_rcu+0x10/0x10 [ 64.169977] ? __refcount_add_not_zero.constprop.0+0xb2/0x110 [ 64.169977] ? __pfx___refcount_add_not_zero.constprop.0+0x10/0x10 [ 64.169977] xfrm_resolve_and_create_bundle+0xd5/0x310 [ 64.169977] ? __pfx_xfrm_resolve_and_create_bundle+0x10/0x10 [ 64.169977] ? __pfx_xfrm_policy_lookup_bytype+0x10/0x10 [ 64.169977] ? __pfx_xfrm_policy_lookup_bytype+0x10/0x10 [ 64.169977] xfrm_lookup_with_ifid+0x3d8/0xb80 [ 64.169977] ? __pfx_xfrm_lookup_with_ifid+0x10/0x10 [ 64.169977] ? ip_route_output_key_hash+0xc6/0x110 [ 64.169977] ? kasan_save_track+0x10/0x30 [ 64.169977] xfrm_lookup_route+0x18/0xe0 [ 64.169977] ip4_datagram_release_cb+0x4c9/0x530 [ 64.169977] ? __pfx_ip4_datagram_release_cb+0x10/0x10 [ 64.169977] ? do_raw_spin_lock+0x71/0xc0 [ 64.169977] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 64.169977] release_sock+0xb0/0x170 [ 64.169977] udp_connect+0x43/0x50 [ 64.169977] __sys_connect+0xa6/0x100 [ 64.169977] ? alloc_fd+0x2e9/0x300 [ 64.169977] ? __pfx___sys_connect+0x10/0x10 [ 64.169977] ? preempt_latency ---truncated---
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d1716d5a44c37e5743bf6ea4e5cdbdab37727f27 , < d7fc6f351c478586980a521d63b0214d9c055e78 (git)
Affected: d1716d5a44c37e5743bf6ea4e5cdbdab37727f27 , < 9333f4b6f44858fc98eb12bf26b8d2959eb975d5 (git)
Affected: d1716d5a44c37e5743bf6ea4e5cdbdab37727f27 , < ea528f18231ec0f33317be57f8866913b19aba6e (git)
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Linux Linux Affected: 6.14
Unaffected: 0 , < 6.14 (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/xfrm/xfrm_user.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d7fc6f351c478586980a521d63b0214d9c055e78",
              "status": "affected",
              "version": "d1716d5a44c37e5743bf6ea4e5cdbdab37727f27",
              "versionType": "git"
            },
            {
              "lessThan": "9333f4b6f44858fc98eb12bf26b8d2959eb975d5",
              "status": "affected",
              "version": "d1716d5a44c37e5743bf6ea4e5cdbdab37727f27",
              "versionType": "git"
            },
            {
              "lessThan": "ea528f18231ec0f33317be57f8866913b19aba6e",
              "status": "affected",
              "version": "d1716d5a44c37e5743bf6ea4e5cdbdab37727f27",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/xfrm/xfrm_user.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.42",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: reject optional IPTFS templates in outbound policies\n\nsyzbot reported a stack-out-of-bounds read in xfrm_state_find()\nwhich flows from xfrm_tmpl_resolve_one().\n\nCommit 3d776e31c841 (\"xfrm: Reject optional tunnel/BEET mode\ntemplates in outbound policies\") disallowed optional tunnel and\nBEET in outbound policies to prevent this. Later when IPTFS\nadded, it was not covered by that fix and can still trigger\nthe out-of-bounds read;\n\nExtend the check to disallow optional IPTFS in outbound policies\nas well. IPTFS should be identical to tunnel mode.\nIN and FWD policies are not affected: xfrm_tmpl_resolve_one()\nis only reachable via the outbound path.\n\nReproducer, before:\n\nip link add dummy0 type dummy\nip link set dummy0 up\nip addr add 10.1.1.1/24 dev dummy0\nip xfrm policy add src 10.1.1.1/32 dst 10.1.1.2/32 dir out tmpl\n  src fc00::dead:1 dst fc00::dead:2 proto esp reqid 1 mode iptfs\n  level use tmpl src fc00::dead:1 dst fc00::dead:2 proto esp reqid\n  2 mode transport\nping -W 1 -c 1 10.1.1.2\nPING 10.1.1.2 (10.1.1.2) 56(84) bytes of data.\n\n[   64.168420] ==================================================================\n[   64.169977] BUG: KASAN: stack-out-of-bounds in __xfrm6_addr_hash+0x11e/0x170\n[   64.169977] Read of size 4 at addr ffff88800e1ffd20 by task ping/2844\n\n[   64.169977] CPU: 2 UID: 0 PID: 2844 Comm: ping Not tainted 7.1.0-rc7-00180-geb23b588430a #98 PREEMPT(full)\n[   64.169977] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[   64.169977] Call Trace:\n[   64.169977]  \u003cTASK\u003e\n[   64.169977]  dump_stack_lvl+0x47/0x70\n[   64.169977]  ? __xfrm6_addr_hash+0x11e/0x170\n[   64.169977]  print_report+0x152/0x4b0\n[   64.169977]  ? ksys_mmap_pgoff+0x6d/0xa0\n[   64.169977]  ? entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[   64.169977]  ? rcu_read_unlock_sched+0xa/0x20\n[   64.169977]  ? __virt_addr_valid+0x21b/0x230\n[   64.169977]  ? __xfrm6_addr_hash+0x11e/0x170\n[   64.169977]  kasan_report+0xa8/0xd0\n[   64.169977]  ? __xfrm6_addr_hash+0x11e/0x170\n[   64.169977]  __xfrm6_addr_hash+0x11e/0x170\n[   64.169977]  __xfrm_dst_hash+0x24/0xc0\n[   64.169977]  xfrm_state_find+0xa2d/0x2f90\n[   64.169977]  ? __pfx_xfrm_state_find+0x10/0x10\n[   64.169977]  ? __pfx_ftrace_graph_ret_addr+0x10/0x10\n[   64.169977]  ? __pfx_ftrace_graph_ret_addr+0x10/0x10\n[   64.169977]  xfrm_tmpl_resolve_one+0x210/0x570\n[   64.169977]  ? __pfx_xfrm_tmpl_resolve_one+0x10/0x10\n[   64.169977]  ? __pfx_stack_trace_consume_entry+0x10/0x10\n[   64.169977]  ? kernel_text_address+0x5b/0x80\n[   64.169977]  ? __kernel_text_address+0xe/0x30\n[   64.169977]  ? unwind_get_return_address+0x5e/0x90\n[   64.169977]  ? arch_stack_walk+0x8c/0xe0\n[   64.169977]  xfrm_tmpl_resolve+0x130/0x200\n[   64.169977]  ? __pfx_xfrm_tmpl_resolve+0x10/0x10\n[   64.169977]  ? __pfx_xfrm_policy_inexact_lookup_rcu+0x10/0x10\n[   64.169977]  ? __refcount_add_not_zero.constprop.0+0xb2/0x110\n[   64.169977]  ? __pfx___refcount_add_not_zero.constprop.0+0x10/0x10\n[   64.169977]  xfrm_resolve_and_create_bundle+0xd5/0x310\n[   64.169977]  ? __pfx_xfrm_resolve_and_create_bundle+0x10/0x10\n[   64.169977]  ? __pfx_xfrm_policy_lookup_bytype+0x10/0x10\n[   64.169977]  ? __pfx_xfrm_policy_lookup_bytype+0x10/0x10\n[   64.169977]  xfrm_lookup_with_ifid+0x3d8/0xb80\n[   64.169977]  ? __pfx_xfrm_lookup_with_ifid+0x10/0x10\n[   64.169977]  ? ip_route_output_key_hash+0xc6/0x110\n[   64.169977]  ? kasan_save_track+0x10/0x30\n[   64.169977]  xfrm_lookup_route+0x18/0xe0\n[   64.169977]  ip4_datagram_release_cb+0x4c9/0x530\n[   64.169977]  ? __pfx_ip4_datagram_release_cb+0x10/0x10\n[   64.169977]  ? do_raw_spin_lock+0x71/0xc0\n[   64.169977]  ? __pfx_do_raw_spin_lock+0x10/0x10\n[   64.169977]  release_sock+0xb0/0x170\n[   64.169977]  udp_connect+0x43/0x50\n[   64.169977]  __sys_connect+0xa6/0x100\n[   64.169977]  ? alloc_fd+0x2e9/0x300\n[   64.169977]  ? __pfx___sys_connect+0x10/0x10\n[   64.169977]  ? preempt_latency\n---truncated---"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The attacker must install an XFRM policy over the AF_KEY/XFRM netlink socket and then originate local traffic (connect()/sendto()) matching that policy, so the entire path requires local access to the machine; no remote packet reaches this code.\nAC:L - The reproducer is deterministic \u2014 add one outbound policy with an optional IPTFS template plus a following transport-mode template of a different family, then send one packet; no race, no memory-layout dependence, and CONFIG_XFRM is enabled on all mainstream distros.\nPR:L - xfrm_user_rcv_msg() checks netlink_net_capable(CAP_NET_ADMIN), which resolves to ns_capable(net-\u003euser_ns, CAP_NET_ADMIN); an unprivileged user obtains this with \"unshare -Urn\" and can create the dummy device, the policy, and the triggering traffic entirely inside that namespace.\nUI:N - The attacker performs every step \u2014 policy insertion and packet transmission \u2014 with no action by any other user or administrator.\nS:U - The out-of-bounds read stays within the kernel\u0027s own stack and the affected resources are managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - __xfrm6_addr_hash() reads 16 bytes from a 4-byte on-stack IPv4 address, exposing adjacent kernel stack contents; with zeroed template addresses xfrm_init_tempstate() copies those bytes into the acquire state, which is broadcast to userspace via XFRM_MSG_ACQUIRE, leaking kernel stack data (potentially pointers usable for KASLR defeat).\nI:N - The defect is purely a read of out-of-bounds stack memory; no kernel memory is written out of bounds and no control-flow or data structure is corrupted by the attacker.\nA:H - The invalid access is a KASAN-detected stack out-of-bounds read that taints the kernel and terminates the machine on kernels built with KASAN or panic_on_warn, and the bogus state derived from garbage addresses can be re-triggered at will by an unprivileged user."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:05:15.432Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d7fc6f351c478586980a521d63b0214d9c055e78"
        },
        {
          "url": "https://git.kernel.org/stable/c/9333f4b6f44858fc98eb12bf26b8d2959eb975d5"
        },
        {
          "url": "https://git.kernel.org/stable/c/ea528f18231ec0f33317be57f8866913b19aba6e"
        }
      ],
      "title": "xfrm: reject optional IPTFS templates in outbound policies",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68420",
    "datePublished": "2026-08-10T12:04:40.933Z",
    "dateReserved": "2026-07-30T09:28:09.392Z",
    "dateUpdated": "2026-08-17T05:05:15.432Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-68420",
      "date": "2026-09-11",
      "epss": "0.00115",
      "percentile": "0.01762"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-68420\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-10T13:20:35.840\",\"lastModified\":\"2026-08-17T06:17:51.013\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nxfrm: reject optional IPTFS templates in outbound policies\\n\\nsyzbot reported a stack-out-of-bounds read in xfrm_state_find()\\nwhich flows from xfrm_tmpl_resolve_one().\\n\\nCommit 3d776e31c841 (\\\"xfrm: Reject optional tunnel/BEET mode\\ntemplates in outbound policies\\\") disallowed optional tunnel and\\nBEET in outbound policies to prevent this. Later when IPTFS\\nadded, it was not covered by that fix and can still trigger\\nthe out-of-bounds read;\\n\\nExtend the check to disallow optional IPTFS in outbound policies\\nas well. IPTFS should be identical to tunnel mode.\\nIN and FWD policies are not affected: xfrm_tmpl_resolve_one()\\nis only reachable via the outbound path.\\n\\nReproducer, before:\\n\\nip link add dummy0 type dummy\\nip link set dummy0 up\\nip addr add 10.1.1.1/24 dev dummy0\\nip xfrm policy add src 10.1.1.1/32 dst 10.1.1.2/32 dir out tmpl\\n  src fc00::dead:1 dst fc00::dead:2 proto esp reqid 1 mode iptfs\\n  level use tmpl src fc00::dead:1 dst fc00::dead:2 proto esp reqid\\n  2 mode transport\\nping -W 1 -c 1 10.1.1.2\\nPING 10.1.1.2 (10.1.1.2) 56(84) bytes of data.\\n\\n[   64.168420] ==================================================================\\n[   64.169977] BUG: KASAN: stack-out-of-bounds in __xfrm6_addr_hash+0x11e/0x170\\n[   64.169977] Read of size 4 at addr ffff88800e1ffd20 by task ping/2844\\n\\n[   64.169977] CPU: 2 UID: 0 PID: 2844 Comm: ping Not tainted 7.1.0-rc7-00180-geb23b588430a #98 PREEMPT(full)\\n[   64.169977] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\\n[   64.169977] Call Trace:\\n[   64.169977]  \u003cTASK\u003e\\n[   64.169977]  dump_stack_lvl+0x47/0x70\\n[   64.169977]  ? __xfrm6_addr_hash+0x11e/0x170\\n[   64.169977]  print_report+0x152/0x4b0\\n[   64.169977]  ? ksys_mmap_pgoff+0x6d/0xa0\\n[   64.169977]  ? entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n[   64.169977]  ? rcu_read_unlock_sched+0xa/0x20\\n[   64.169977]  ? __virt_addr_valid+0x21b/0x230\\n[   64.169977]  ? __xfrm6_addr_hash+0x11e/0x170\\n[   64.169977]  kasan_report+0xa8/0xd0\\n[   64.169977]  ? __xfrm6_addr_hash+0x11e/0x170\\n[   64.169977]  __xfrm6_addr_hash+0x11e/0x170\\n[   64.169977]  __xfrm_dst_hash+0x24/0xc0\\n[   64.169977]  xfrm_state_find+0xa2d/0x2f90\\n[   64.169977]  ? __pfx_xfrm_state_find+0x10/0x10\\n[   64.169977]  ? __pfx_ftrace_graph_ret_addr+0x10/0x10\\n[   64.169977]  ? __pfx_ftrace_graph_ret_addr+0x10/0x10\\n[   64.169977]  xfrm_tmpl_resolve_one+0x210/0x570\\n[   64.169977]  ? __pfx_xfrm_tmpl_resolve_one+0x10/0x10\\n[   64.169977]  ? __pfx_stack_trace_consume_entry+0x10/0x10\\n[   64.169977]  ? kernel_text_address+0x5b/0x80\\n[   64.169977]  ? __kernel_text_address+0xe/0x30\\n[   64.169977]  ? unwind_get_return_address+0x5e/0x90\\n[   64.169977]  ? arch_stack_walk+0x8c/0xe0\\n[   64.169977]  xfrm_tmpl_resolve+0x130/0x200\\n[   64.169977]  ? __pfx_xfrm_tmpl_resolve+0x10/0x10\\n[   64.169977]  ? __pfx_xfrm_policy_inexact_lookup_rcu+0x10/0x10\\n[   64.169977]  ? __refcount_add_not_zero.constprop.0+0xb2/0x110\\n[   64.169977]  ? __pfx___refcount_add_not_zero.constprop.0+0x10/0x10\\n[   64.169977]  xfrm_resolve_and_create_bundle+0xd5/0x310\\n[   64.169977]  ? __pfx_xfrm_resolve_and_create_bundle+0x10/0x10\\n[   64.169977]  ? __pfx_xfrm_policy_lookup_bytype+0x10/0x10\\n[   64.169977]  ? __pfx_xfrm_policy_lookup_bytype+0x10/0x10\\n[   64.169977]  xfrm_lookup_with_ifid+0x3d8/0xb80\\n[   64.169977]  ? __pfx_xfrm_lookup_with_ifid+0x10/0x10\\n[   64.169977]  ? ip_route_output_key_hash+0xc6/0x110\\n[   64.169977]  ? kasan_save_track+0x10/0x30\\n[   64.169977]  xfrm_lookup_route+0x18/0xe0\\n[   64.169977]  ip4_datagram_release_cb+0x4c9/0x530\\n[   64.169977]  ? __pfx_ip4_datagram_release_cb+0x10/0x10\\n[   64.169977]  ? do_raw_spin_lock+0x71/0xc0\\n[   64.169977]  ? __pfx_do_raw_spin_lock+0x10/0x10\\n[   64.169977]  release_sock+0xb0/0x170\\n[   64.169977]  udp_connect+0x43/0x50\\n[   64.169977]  __sys_connect+0xa6/0x100\\n[   64.169977]  ? alloc_fd+0x2e9/0x300\\n[   64.169977]  ? __pfx___sys_connect+0x10/0x10\\n[   64.169977]  ? preempt_latency\\n---truncated---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/xfrm/xfrm_user.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d1716d5a44c37e5743bf6ea4e5cdbdab37727f27\",\"lessThan\":\"d7fc6f351c478586980a521d63b0214d9c055e78\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d1716d5a44c37e5743bf6ea4e5cdbdab37727f27\",\"lessThan\":\"9333f4b6f44858fc98eb12bf26b8d2959eb975d5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d1716d5a44c37e5743bf6ea4e5cdbdab37727f27\",\"lessThan\":\"ea528f18231ec0f33317be57f8866913b19aba6e\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/xfrm/xfrm_user.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.14\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.14\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/9333f4b6f44858fc98eb12bf26b8d2959eb975d5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d7fc6f351c478586980a521d63b0214d9c055e78\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ea528f18231ec0f33317be57f8866913b19aba6e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-13T23:27:04+00:00",
      "cve": "CVE-2026-68420",
      "id": "CVE-2026-68420",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "260",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: xfrm: reject optional IPTFS templates in outbound policies",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68420.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-11T23:45:52Z",
      "cve": "CVE-2026-68420",
      "id": "CVE-2026-68420",
      "initial_release_date": "2026-08-11T23:45:52Z",
      "product_status:known_affected": "12",
      "product_status:known_not_affected": "284",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68420",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68420.json",
      "version": "2"
    }
  }
}



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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

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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.