CVE-2023-52991 (GCVE-0-2023-52991)
Vulnerability from cvelistv5
Published
2025-03-27 16:43
Modified
2026-08-05 09:12
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: fix NULL pointer in skb_segment_list
Commit 3a1296a38d0c ("net: Support GRO/GSO fraglist chaining.")
introduced UDP listifyed GRO. The segmentation relies on frag_list being
untouched when passing through the network stack. This assumption can be
broken sometimes, where frag_list itself gets pulled into linear area,
leaving frag_list being NULL. When this happens it can trigger
following NULL pointer dereference, and panic the kernel. Reverse the
test condition should fix it.
[19185.577801][ C1] BUG: kernel NULL pointer dereference, address:
...
[19185.663775][ C1] RIP: 0010:skb_segment_list+0x1cc/0x390
...
[19185.834644][ C1] Call Trace:
[19185.841730][ C1] <TASK>
[19185.848563][ C1] __udp_gso_segment+0x33e/0x510
[19185.857370][ C1] inet_gso_segment+0x15b/0x3e0
[19185.866059][ C1] skb_mac_gso_segment+0x97/0x110
[19185.874939][ C1] __skb_gso_segment+0xb2/0x160
[19185.883646][ C1] udp_queue_rcv_skb+0xc3/0x1d0
[19185.892319][ C1] udp_unicast_rcv_skb+0x75/0x90
[19185.900979][ C1] ip_protocol_deliver_rcu+0xd2/0x200
[19185.910003][ C1] ip_local_deliver_finish+0x44/0x60
[19185.918757][ C1] __netif_receive_skb_one_core+0x8b/0xa0
[19185.927834][ C1] process_backlog+0x88/0x130
[19185.935840][ C1] __napi_poll+0x27/0x150
[19185.943447][ C1] net_rx_action+0x27e/0x5f0
[19185.951331][ C1] ? mlx5_cq_tasklet_cb+0x70/0x160 [mlx5_core]
[19185.960848][ C1] __do_softirq+0xbc/0x25d
[19185.968607][ C1] irq_exit_rcu+0x83/0xb0
[19185.976247][ C1] common_interrupt+0x43/0xa0
[19185.984235][ C1] asm_common_interrupt+0x22/0x40
...
[19186.094106][ C1] </TASK>
References
| URL | Tags | |
|---|---|---|
Impacted products
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}
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"title": "net: fix NULL pointer in skb_segment_list",
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"datePublished": "2025-03-27T16:43:26.991Z",
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"dateUpdated": "2026-08-05T09:12:18.633Z",
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Reverse the\\ntest condition should fix it.\\n\\n[19185.577801][ C1] BUG: kernel NULL pointer dereference, address:\\n...\\n[19185.663775][ C1] RIP: 0010:skb_segment_list+0x1cc/0x390\\n...\\n[19185.834644][ C1] Call Trace:\\n[19185.841730][ C1] \u003cTASK\u003e\\n[19185.848563][ C1] __udp_gso_segment+0x33e/0x510\\n[19185.857370][ C1] inet_gso_segment+0x15b/0x3e0\\n[19185.866059][ C1] skb_mac_gso_segment+0x97/0x110\\n[19185.874939][ C1] __skb_gso_segment+0xb2/0x160\\n[19185.883646][ C1] udp_queue_rcv_skb+0xc3/0x1d0\\n[19185.892319][ C1] udp_unicast_rcv_skb+0x75/0x90\\n[19185.900979][ C1] ip_protocol_deliver_rcu+0xd2/0x200\\n[19185.910003][ C1] ip_local_deliver_finish+0x44/0x60\\n[19185.918757][ C1] __netif_receive_skb_one_core+0x8b/0xa0\\n[19185.927834][ C1] process_backlog+0x88/0x130\\n[19185.935840][ C1] __napi_poll+0x27/0x150\\n[19185.943447][ C1] net_rx_action+0x27e/0x5f0\\n[19185.951331][ C1] ? mlx5_cq_tasklet_cb+0x70/0x160 [mlx5_core]\\n[19185.960848][ C1] __do_softirq+0xbc/0x25d\\n[19185.968607][ C1] irq_exit_rcu+0x83/0xb0\\n[19185.976247][ C1] common_interrupt+0x43/0xa0\\n[19185.984235][ C1] asm_common_interrupt+0x22/0x40\\n...\\n[19186.094106][ C1] \u003c/TASK\u003e\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.167\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.92\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.10\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.2\", \"versionStartIncluding\": \"5.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T09:12:18.633Z\"}}}",
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}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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