CVE-2023-53365 (GCVE-0-2023-53365)

Vulnerability from cvelistv5 – Published: 2025-09-17 14:56 – Updated: 2026-05-11 19:43
VLAI
Title
ip6mr: Fix skb_under_panic in ip6mr_cache_report()
Summary
In the Linux kernel, the following vulnerability has been resolved: ip6mr: Fix skb_under_panic in ip6mr_cache_report() skbuff: skb_under_panic: text:ffffffff88771f69 len:56 put:-4 head:ffff88805f86a800 data:ffff887f5f86a850 tail:0x88 end:0x2c0 dev:pim6reg ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:192! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 2 PID: 22968 Comm: kworker/2:11 Not tainted 6.5.0-rc3-00044-g0a8db05b571a #236 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: ipv6_addrconf addrconf_dad_work RIP: 0010:skb_panic+0x152/0x1d0 Call Trace: <TASK> skb_push+0xc4/0xe0 ip6mr_cache_report+0xd69/0x19b0 reg_vif_xmit+0x406/0x690 dev_hard_start_xmit+0x17e/0x6e0 __dev_queue_xmit+0x2d6a/0x3d20 vlan_dev_hard_start_xmit+0x3ab/0x5c0 dev_hard_start_xmit+0x17e/0x6e0 __dev_queue_xmit+0x2d6a/0x3d20 neigh_connected_output+0x3ed/0x570 ip6_finish_output2+0x5b5/0x1950 ip6_finish_output+0x693/0x11c0 ip6_output+0x24b/0x880 NF_HOOK.constprop.0+0xfd/0x530 ndisc_send_skb+0x9db/0x1400 ndisc_send_rs+0x12a/0x6c0 addrconf_dad_completed+0x3c9/0xea0 addrconf_dad_work+0x849/0x1420 process_one_work+0xa22/0x16e0 worker_thread+0x679/0x10c0 ret_from_fork+0x28/0x60 ret_from_fork_asm+0x11/0x20 When setup a vlan device on dev pim6reg, DAD ns packet may sent on reg_vif_xmit(). reg_vif_xmit() ip6mr_cache_report() skb_push(skb, -skb_network_offset(pkt));//skb_network_offset(pkt) is 4 And skb_push declared as: void *skb_push(struct sk_buff *skb, unsigned int len); skb->data -= len; //0xffff88805f86a84c - 0xfffffffc = 0xffff887f5f86a850 skb->data is set to 0xffff887f5f86a850, which is invalid mem addr, lead to skb_push() fails.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:45 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d , < a96d74d1076c82a4cef02c150d9996b21354c78d (git)
Affected: 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d , < 8382e7ed2d63e6c2daf6881fa091526dc6c879cd (git)
Affected: 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d , < 0438e60a00d4e335b3c36397dbf26c74b5d13ef0 (git)
Affected: 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d , < 1683124129a4263dd5bce2475bab110e95fa0346 (git)
Affected: 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d , < 1bb54a21f4d9b88442f8c3307c780e2db64417e4 (git)
Affected: 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d , < 691a09eecad97e745b9aa0e3918db46d020bdacb (git)
Affected: 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d , < 3326c711f18d18fe6e1f5d83d3a7eab07e5a1560 (git)
Affected: 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d , < 30e0191b16e8a58e4620fa3e2839ddc7b9d4281c (git)
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Linux Linux Affected: 2.6.26
Unaffected: 0 , < 2.6.26 (semver)
Unaffected: 4.14.322 , ≤ 4.14.* (semver)
Unaffected: 4.19.291 , ≤ 4.19.* (semver)
Unaffected: 5.4.253 , ≤ 5.4.* (semver)
Unaffected: 5.10.190 , ≤ 5.10.* (semver)
Unaffected: 5.15.126 , ≤ 5.15.* (semver)
Unaffected: 6.1.45 , ≤ 6.1.* (semver)
Unaffected: 6.4.10 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nip6mr: Fix skb_under_panic in ip6mr_cache_report()\n\nskbuff: skb_under_panic: text:ffffffff88771f69 len:56 put:-4\n head:ffff88805f86a800 data:ffff887f5f86a850 tail:0x88 end:0x2c0 dev:pim6reg\n ------------[ cut here ]------------\n kernel BUG at net/core/skbuff.c:192!\n invalid opcode: 0000 [#1] PREEMPT SMP KASAN\n CPU: 2 PID: 22968 Comm: kworker/2:11 Not tainted 6.5.0-rc3-00044-g0a8db05b571a #236\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\n Workqueue: ipv6_addrconf addrconf_dad_work\n RIP: 0010:skb_panic+0x152/0x1d0\n Call Trace:\n  \u003cTASK\u003e\n  skb_push+0xc4/0xe0\n  ip6mr_cache_report+0xd69/0x19b0\n  reg_vif_xmit+0x406/0x690\n  dev_hard_start_xmit+0x17e/0x6e0\n  __dev_queue_xmit+0x2d6a/0x3d20\n  vlan_dev_hard_start_xmit+0x3ab/0x5c0\n  dev_hard_start_xmit+0x17e/0x6e0\n  __dev_queue_xmit+0x2d6a/0x3d20\n  neigh_connected_output+0x3ed/0x570\n  ip6_finish_output2+0x5b5/0x1950\n  ip6_finish_output+0x693/0x11c0\n  ip6_output+0x24b/0x880\n  NF_HOOK.constprop.0+0xfd/0x530\n  ndisc_send_skb+0x9db/0x1400\n  ndisc_send_rs+0x12a/0x6c0\n  addrconf_dad_completed+0x3c9/0xea0\n  addrconf_dad_work+0x849/0x1420\n  process_one_work+0xa22/0x16e0\n  worker_thread+0x679/0x10c0\n  ret_from_fork+0x28/0x60\n  ret_from_fork_asm+0x11/0x20\n\nWhen setup a vlan device on dev pim6reg, DAD ns packet may sent on reg_vif_xmit().\nreg_vif_xmit()\n    ip6mr_cache_report()\n        skb_push(skb, -skb_network_offset(pkt));//skb_network_offset(pkt) is 4\nAnd skb_push declared as:\n\tvoid *skb_push(struct sk_buff *skb, unsigned int len);\n\t\tskb-\u003edata -= len;\n\t\t//0xffff88805f86a84c - 0xfffffffc = 0xffff887f5f86a850\nskb-\u003edata is set to 0xffff887f5f86a850, which is invalid mem addr, lead to skb_push() fails."
          }
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              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nip6mr: Fix skb_under_panic in ip6mr_cache_report()\n\nskbuff: skb_under_panic: text:ffffffff88771f69 len:56 put:-4\n head:ffff88805f86a800 data:ffff887f5f86a850 tail:0x88 end:0x2c0 dev:pim6reg\n ------------[ cut here ]------------\n kernel BUG at net/core/skbuff.c:192!\n invalid opcode: 0000 [#1] PREEMPT SMP KASAN\n CPU: 2 PID: 22968 Comm: kworker/2:11 Not tainted 6.5.0-rc3-00044-g0a8db05b571a #236\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\n Workqueue: ipv6_addrconf addrconf_dad_work\n RIP: 0010:skb_panic+0x152/0x1d0\n Call Trace:\n  \u003cTASK\u003e\n  skb_push+0xc4/0xe0\n  ip6mr_cache_report+0xd69/0x19b0\n  reg_vif_xmit+0x406/0x690\n  dev_hard_start_xmit+0x17e/0x6e0\n  __dev_queue_xmit+0x2d6a/0x3d20\n  vlan_dev_hard_start_xmit+0x3ab/0x5c0\n  dev_hard_start_xmit+0x17e/0x6e0\n  __dev_queue_xmit+0x2d6a/0x3d20\n  neigh_connected_output+0x3ed/0x570\n  ip6_finish_output2+0x5b5/0x1950\n  ip6_finish_output+0x693/0x11c0\n  ip6_output+0x24b/0x880\n  NF_HOOK.constprop.0+0xfd/0x530\n  ndisc_send_skb+0x9db/0x1400\n  ndisc_send_rs+0x12a/0x6c0\n  addrconf_dad_completed+0x3c9/0xea0\n  addrconf_dad_work+0x849/0x1420\n  process_one_work+0xa22/0x16e0\n  worker_thread+0x679/0x10c0\n  ret_from_fork+0x28/0x60\n  ret_from_fork_asm+0x11/0x20\n\nWhen setup a vlan device on dev pim6reg, DAD ns packet may sent on reg_vif_xmit().\nreg_vif_xmit()\n    ip6mr_cache_report()\n        skb_push(skb, -skb_network_offset(pkt));//skb_network_offset(pkt) is 4\nAnd skb_push declared as:\n\tvoid *skb_push(struct sk_buff *skb, unsigned int len);\n\t\tskb-\u003edata -= len;\n\t\t//0xffff88805f86a84c - 0xfffffffc = 0xffff887f5f86a850\nskb-\u003edata is set to 0xffff887f5f86a850, which is invalid mem addr, lead to skb_push() fails."
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            },
            {
              "url": "https://git.kernel.org/stable/c/0438e60a00d4e335b3c36397dbf26c74b5d13ef0"
            },
            {
              "url": "https://git.kernel.org/stable/c/1683124129a4263dd5bce2475bab110e95fa0346"
            },
            {
              "url": "https://git.kernel.org/stable/c/1bb54a21f4d9b88442f8c3307c780e2db64417e4"
            },
            {
              "url": "https://git.kernel.org/stable/c/691a09eecad97e745b9aa0e3918db46d020bdacb"
            },
            {
              "url": "https://git.kernel.org/stable/c/3326c711f18d18fe6e1f5d83d3a7eab07e5a1560"
            },
            {
              "url": "https://git.kernel.org/stable/c/30e0191b16e8a58e4620fa3e2839ddc7b9d4281c"
            }
          ],
          "title": "ip6mr: Fix skb_under_panic in ip6mr_cache_report()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-53365",
        "datePublished": "2025-09-17T14:56:53.781Z",
        "dateReserved": "2025-09-17T14:54:09.733Z",
        "dateUpdated": "2026-05-11T19:43:32.333Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.