Vulnerability-Lookup

OPENSUSE-SU-2026:11648-1

Vulnerability from csaf_opensuse - Published: 2026-08-30 00:00 - Updated: 2026-09-17 17:22

Summary

kernel-devel-7.2.2-1.1 on GA media

Severity

Moderate

Notes

Title of the patch: kernel-devel-7.2.2-1.1 on GA media

Description of the patch: These are all security issues fixed in the kernel-devel-7.2.2-1.1 package on the GA media of openSUSE Tumbleweed.

Patchnames: openSUSE-Tumbleweed-2026-11648

CVE-2026-80590

5.5 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 16 products

Product	Version	Remediation
Unresolved product id: openSUSE Tumbleweed:kernel-devel-0:7.2.2-1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-devel-0:7.2.2-1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-devel-0:7.2.2-1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-devel-0:7.2.2-1.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-macros-0:7.2.2-1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-macros-0:7.2.2-1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-macros-0:7.2.2-1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-macros-0:7.2.2-1.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-source-0:7.2.2-1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-source-0:7.2.2-1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-source-0:7.2.2-1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-source-0:7.2.2-1.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-source-vanilla-0:7.2.2-1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-source-vanilla-0:7.2.2-1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-source-vanilla-0:7.2.2-1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:kernel-source-vanilla-0:7.2.2-1.1.x86_64	—	Vendor Fix

Threats

Impact moderate

References

5 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://www.suse.com/security/cve/CVE-2026-80590/	self
https://www.suse.com/security/cve/CVE-2026-80590	external
https://bugzilla.suse.com/1277275	external

JSON

To clipboard

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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-80590",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-80590"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ninet: frags: strip GSO state from fragments before reassembly\n\nA virtio_net_hdr (tun/tap, or AF_PACKET with PACKET_VNET_HDR) can mark\nan IPv4 or IPv6 fragment as GSO; nothing relates gso_type to frag_off.\ninet_frag_reasm_prepare()/inet_frag_reasm_finish() keep the first\nfragment\u0027s skb as the head of the reassembled datagram, including its\nshinfo-\u003egso_size/gso_type/gso_segs, and chain the remaining fragments\non frag_list with whatever linear/paged layout they arrived with.\n\nAfter ip_defrag() (ip_local_deliver(), nf_defrag_ipv4, ...) the\nreassembled skb therefore still claims to be GSO (SKB_GSO_DODGY), and\nthe next software segmentation point - udp_rcv_segment() on local\ndelivery, validate_xmit_skb(), or the ip_finish_output_gso() slow\npath - hands it to skb_segment(). skb_segment()\u0027s frag_list walk\nassumes GRO-shaped input and hits one of its BUG_ON()s. Two writes to\na tap by an unprivileged user in its own userns are enough:\n\n  kernel BUG at net/core/skbuff.c:4899!\n  Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\n  CPU: 0 UID: 1000 PID: 82 Comm: poc Not tainted 7.2.0-pentest+ #2\n  RIP: 0010:skb_segment+0x20ca/0x48b0\n  Call Trace:\n   \u003cTASK\u003e\n   __udp_gso_segment+0x29a/0x27d0\n   udp4_ufo_fragment+0x458/0x6c0\n   inet_gso_segment+0x429/0x1340\n   skb_mac_gso_segment+0x233/0x4f0\n   __skb_gso_segment+0x308/0x660\n   udp_queue_rcv_skb+0x440/0xad0\n   udp_unicast_rcv_skb+0xc7/0x2c0\n   udp_rcv+0x16ce/0x2260\n   ip_protocol_deliver_rcu+0x197/0x2d0\n   ip_local_deliver+0x430/0x690\n   ip_rcv+0x16f/0x1f0\n   __netif_receive_skb_one_core+0x15e/0x1c0\n   __netif_receive_skb+0x1e/0x110\n   netif_receive_skb+0xf6/0x5c0\n   tun_rx_batched.isra.0+0x3ab/0x790\n   tun_get_user+0x17c3/0x3550\n   tun_chr_write_iter+0xba/0x1b0\n   vfs_write+0x646/0x1130\n   \u003c/TASK\u003e\n  Kernel panic - not syncing: Fatal exception in interrupt\n\nThis runs with BH disabled, so it is a panic rather than an oops. The\nsame is reachable with CAP_NET_RAW in a netns where a defrag point\nprecedes a GSO point, and from a guest whose VMM forwards\nvirtio_net_hdr to a tap. The SKB_GSO_DODGY frag_list checks added by\ncommit 3dcbdb134f32 (\"net: gso: Fix skb_segment splat when splitting\ngso_size mangled skb having linear-headed frag_list\") and by\ncommit 9e4b7a99a03a (\"net: gso: fix panic on frag_list with mixed head\nalloc types\") do not cover it: page-backed heads skip them, and kmalloc\nheads skip them when gso_size == skb_headlen(head), which the sender\ncontrols.\n\nAn skb entering a frag queue is an IP fragment by definition and\ncannot legitimately carry GSO state: GRO does not merge fragments and\nthe stack segments before it fragments, so only untrusted sources are\naffected. This has been reachable since\ncommit f43798c27684 (\"tun: Allow GSO using virtio_net_hdr\"), the first\npath that let userspace attach GSO metadata to an IP fragment. Reset\nthe GSO fields of every fragment as it is queued, in\ninet_frag_queue_insert(), which IPv4, IPv6, nf_conntrack_reasm and\n6lowpan reassembly share; then neither the head nor the frag_list\nmembers of the reassembled skb carry them (the members matter too:\nthe ip_do_fragment()/ip6_fragment() fast paths send them out as they\nare). The head may remain CHECKSUM_PARTIAL; that is already accepted\non receive and resolved by skb_checksum_help() in\nip_do_fragment()/ip6_fragment() on forward.\n\nTested on top of net.git (dc4b95b8fee9), x86_64: the tap reproducer\nabove, two further IPv4 frag_list geometries that reach\nBUG_ON(i \u003e= nfrags) and BUG_ON(!list_skb-\u003ehead_frag), and an IPv6\nfragment-header variant (udp6_ufo_fragment()) each panic the unpatched\nkernel; with this patch all four datagrams are delivered intact and\nnothing is logged.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
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      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-80590",
          "url": "https://www.suse.com/security/cve/CVE-2026-80590"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1277275 for CVE-2026-80590",
          "url": "https://bugzilla.suse.com/1277275"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
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      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-30T00:00:00Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-80590"
    }
  ]
}

CVE-2026-80590 (GCVE-0-2026-80590)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:35 – Updated: 2026-08-31 06:12

Title

inet: frags: strip GSO state from fragments before reassembly

Summary

In the Linux kernel, the following vulnerability has been resolved: inet: frags: strip GSO state from fragments before reassembly A virtio_net_hdr (tun/tap, or AF_PACKET with PACKET_VNET_HDR) can mark an IPv4 or IPv6 fragment as GSO; nothing relates gso_type to frag_off. inet_frag_reasm_prepare()/inet_frag_reasm_finish() keep the first fragment's skb as the head of the reassembled datagram, including its shinfo->gso_size/gso_type/gso_segs, and chain the remaining fragments on frag_list with whatever linear/paged layout they arrived with. After ip_defrag() (ip_local_deliver(), nf_defrag_ipv4, ...) the reassembled skb therefore still claims to be GSO (SKB_GSO_DODGY), and the next software segmentation point - udp_rcv_segment() on local delivery, validate_xmit_skb(), or the ip_finish_output_gso() slow path - hands it to skb_segment(). skb_segment()'s frag_list walk assumes GRO-shaped input and hits one of its BUG_ON()s. Two writes to a tap by an unprivileged user in its own userns are enough: kernel BUG at net/core/skbuff.c:4899! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 1000 PID: 82 Comm: poc Not tainted 7.2.0-pentest+ #2 RIP: 0010:skb_segment+0x20ca/0x48b0 Call Trace: <TASK> __udp_gso_segment+0x29a/0x27d0 udp4_ufo_fragment+0x458/0x6c0 inet_gso_segment+0x429/0x1340 skb_mac_gso_segment+0x233/0x4f0 __skb_gso_segment+0x308/0x660 udp_queue_rcv_skb+0x440/0xad0 udp_unicast_rcv_skb+0xc7/0x2c0 udp_rcv+0x16ce/0x2260 ip_protocol_deliver_rcu+0x197/0x2d0 ip_local_deliver+0x430/0x690 ip_rcv+0x16f/0x1f0 __netif_receive_skb_one_core+0x15e/0x1c0 __netif_receive_skb+0x1e/0x110 netif_receive_skb+0xf6/0x5c0 tun_rx_batched.isra.0+0x3ab/0x790 tun_get_user+0x17c3/0x3550 tun_chr_write_iter+0xba/0x1b0 vfs_write+0x646/0x1130 </TASK> Kernel panic - not syncing: Fatal exception in interrupt This runs with BH disabled, so it is a panic rather than an oops. The same is reachable with CAP_NET_RAW in a netns where a defrag point precedes a GSO point, and from a guest whose VMM forwards virtio_net_hdr to a tap. The SKB_GSO_DODGY frag_list checks added by commit 3dcbdb134f32 ("net: gso: Fix skb_segment splat when splitting gso_size mangled skb having linear-headed frag_list") and by commit 9e4b7a99a03a ("net: gso: fix panic on frag_list with mixed head alloc types") do not cover it: page-backed heads skip them, and kmalloc heads skip them when gso_size == skb_headlen(head), which the sender controls. An skb entering a frag queue is an IP fragment by definition and cannot legitimately carry GSO state: GRO does not merge fragments and the stack segments before it fragments, so only untrusted sources are affected. This has been reachable since commit f43798c27684 ("tun: Allow GSO using virtio_net_hdr"), the first path that let userspace attach GSO metadata to an IP fragment. Reset the GSO fields of every fragment as it is queued, in inet_frag_queue_insert(), which IPv4, IPv6, nf_conntrack_reasm and 6lowpan reassembly share; then neither the head nor the frag_list members of the reassembled skb carry them (the members matter too: the ip_do_fragment()/ip6_fragment() fast paths send them out as they are). The head may remain CHECKSUM_PARTIAL; that is already accepted on receive and resolved by skb_checksum_help() in ip_do_fragment()/ip6_fragment() on forward. Tested on top of net.git (dc4b95b8fee9), x86_64: the tap reproducer above, two further IPv4 frag_list geometries that reach BUG_ON(i >= nfrags) and BUG_ON(!list_skb->head_frag), and an IPv6 fragment-header variant (udp6_ufo_fragment()) each panic the unpatched kernel; with this patch all four datagrams are delivered intact and nothing is logged.

Severity

8.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Assigner

Linux mitre root

References

9 references

URL	Tags
https://git.kernel.org/stable/c/cfdbc8c2e6f9ef5d8…
https://git.kernel.org/stable/c/29dda278a5ed272f2…
https://git.kernel.org/stable/c/14a8f3e10fa9a5abd…
https://git.kernel.org/stable/c/3edf721bb4b99d272…
https://git.kernel.org/stable/c/dec2edb7aaf12a887…
https://git.kernel.org/stable/c/c49f04e8d2b94dbb8…
https://git.kernel.org/stable/c/69b73b74d9eb45f55…
https://git.kernel.org/stable/c/da857e448322a2e87…
https://git.kernel.org/stable/c/d5dc1e69fd7258ea6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f43798c27684ab925adde7d8acc34c78c6e50df8 , < cfdbc8c2e6f9ef5d8b8e54859da03dfe682b0bee (git) Affected: f43798c27684ab925adde7d8acc34c78c6e50df8 , < 29dda278a5ed272f2230ff4eaa23cf403107bba0 (git) Affected: f43798c27684ab925adde7d8acc34c78c6e50df8 , < 14a8f3e10fa9a5abd6cedcdaa0c0b7ea9a09f234 (git) Affected: f43798c27684ab925adde7d8acc34c78c6e50df8 , < 3edf721bb4b99d272c336631b44e3d8ff9a4f31b (git) Affected: f43798c27684ab925adde7d8acc34c78c6e50df8 , < dec2edb7aaf12a8878b3a03172ea8fc277b8eaad (git) Affected: f43798c27684ab925adde7d8acc34c78c6e50df8 , < c49f04e8d2b94dbb8d9fd99731dd3f00589c8ace (git) Affected: f43798c27684ab925adde7d8acc34c78c6e50df8 , < 69b73b74d9eb45f5560a8fe4fa406ada580e1340 (git) Affected: f43798c27684ab925adde7d8acc34c78c6e50df8 , < da857e448322a2e871ce3ecc2900027041160d43 (git) Affected: f43798c27684ab925adde7d8acc34c78c6e50df8 , < d5dc1e69fd7258ea605c9952e5d5947539159ae3 (git)
Linux	Linux	Affected: 2.6.27 Unaffected: 0 , < 2.6.27 (semver) Unaffected: 5.10.268 , ≤ 5.10.* (semver) Unaffected: 5.15.219 , ≤ 5.15.* (semver) Unaffected: 6.1.186 , ≤ 6.1.* (semver) Unaffected: 6.6.155 , ≤ 6.6.* (semver) Unaffected: 6.12.107 , ≤ 6.12.* (semver) Unaffected: 6.18.48 , ≤ 6.18.* (semver) Unaffected: 7.1.12 , ≤ 7.1.* (semver) Unaffected: 7.2.2 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/inet_fragment.c"
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          "vendor": "Linux",
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          "vendor": "Linux",
          "versions": [
            {
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            },
            {
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            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
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            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.219",
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            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.186",
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            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.155",
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
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            {
              "lessThanOrEqual": "7.1.*",
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              "version": "7.1.12",
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            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.268",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.219",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.186",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.155",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.107",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.48",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.12",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.2",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ninet: frags: strip GSO state from fragments before reassembly\n\nA virtio_net_hdr (tun/tap, or AF_PACKET with PACKET_VNET_HDR) can mark\nan IPv4 or IPv6 fragment as GSO; nothing relates gso_type to frag_off.\ninet_frag_reasm_prepare()/inet_frag_reasm_finish() keep the first\nfragment\u0027s skb as the head of the reassembled datagram, including its\nshinfo-\u003egso_size/gso_type/gso_segs, and chain the remaining fragments\non frag_list with whatever linear/paged layout they arrived with.\n\nAfter ip_defrag() (ip_local_deliver(), nf_defrag_ipv4, ...) the\nreassembled skb therefore still claims to be GSO (SKB_GSO_DODGY), and\nthe next software segmentation point - udp_rcv_segment() on local\ndelivery, validate_xmit_skb(), or the ip_finish_output_gso() slow\npath - hands it to skb_segment(). skb_segment()\u0027s frag_list walk\nassumes GRO-shaped input and hits one of its BUG_ON()s. Two writes to\na tap by an unprivileged user in its own userns are enough:\n\n  kernel BUG at net/core/skbuff.c:4899!\n  Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\n  CPU: 0 UID: 1000 PID: 82 Comm: poc Not tainted 7.2.0-pentest+ #2\n  RIP: 0010:skb_segment+0x20ca/0x48b0\n  Call Trace:\n   \u003cTASK\u003e\n   __udp_gso_segment+0x29a/0x27d0\n   udp4_ufo_fragment+0x458/0x6c0\n   inet_gso_segment+0x429/0x1340\n   skb_mac_gso_segment+0x233/0x4f0\n   __skb_gso_segment+0x308/0x660\n   udp_queue_rcv_skb+0x440/0xad0\n   udp_unicast_rcv_skb+0xc7/0x2c0\n   udp_rcv+0x16ce/0x2260\n   ip_protocol_deliver_rcu+0x197/0x2d0\n   ip_local_deliver+0x430/0x690\n   ip_rcv+0x16f/0x1f0\n   __netif_receive_skb_one_core+0x15e/0x1c0\n   __netif_receive_skb+0x1e/0x110\n   netif_receive_skb+0xf6/0x5c0\n   tun_rx_batched.isra.0+0x3ab/0x790\n   tun_get_user+0x17c3/0x3550\n   tun_chr_write_iter+0xba/0x1b0\n   vfs_write+0x646/0x1130\n   \u003c/TASK\u003e\n  Kernel panic - not syncing: Fatal exception in interrupt\n\nThis runs with BH disabled, so it is a panic rather than an oops. The\nsame is reachable with CAP_NET_RAW in a netns where a defrag point\nprecedes a GSO point, and from a guest whose VMM forwards\nvirtio_net_hdr to a tap. The SKB_GSO_DODGY frag_list checks added by\ncommit 3dcbdb134f32 (\"net: gso: Fix skb_segment splat when splitting\ngso_size mangled skb having linear-headed frag_list\") and by\ncommit 9e4b7a99a03a (\"net: gso: fix panic on frag_list with mixed head\nalloc types\") do not cover it: page-backed heads skip them, and kmalloc\nheads skip them when gso_size == skb_headlen(head), which the sender\ncontrols.\n\nAn skb entering a frag queue is an IP fragment by definition and\ncannot legitimately carry GSO state: GRO does not merge fragments and\nthe stack segments before it fragments, so only untrusted sources are\naffected. This has been reachable since\ncommit f43798c27684 (\"tun: Allow GSO using virtio_net_hdr\"), the first\npath that let userspace attach GSO metadata to an IP fragment. Reset\nthe GSO fields of every fragment as it is queued, in\ninet_frag_queue_insert(), which IPv4, IPv6, nf_conntrack_reasm and\n6lowpan reassembly share; then neither the head nor the frag_list\nmembers of the reassembled skb carry them (the members matter too:\nthe ip_do_fragment()/ip6_fragment() fast paths send them out as they\nare). The head may remain CHECKSUM_PARTIAL; that is already accepted\non receive and resolved by skb_checksum_help() in\nip_do_fragment()/ip6_fragment() on forward.\n\nTested on top of net.git (dc4b95b8fee9), x86_64: the tap reproducer\nabove, two further IPv4 frag_list geometries that reach\nBUG_ON(i \u003e= nfrags) and BUG_ON(!list_skb-\u003ehead_frag), and an IPv6\nfragment-header variant (udp6_ufo_fragment()) each panic the unpatched\nkernel; with this patch all four datagrams are delivered intact and\nnothing is logged."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - A malicious cloud VM guest injects virtio_net_hdr-marked IPv4/IPv6 fragments through virtio-net/vhost-tap into the host ip_rcv() path; the same inet_frag reassembly and skb_segment() crash also fires on validate_xmit_skb()/ip_finish_output_gso() when such skbs traverse forwarding.\nAC:L - The attacker fully controls virtio_net_hdr gso_type/gso_size and fragment geometry; the commit reproduces a host panic from two tap writes with no races, timing, or uncontrollable memory layout required.\nPR:N - On typical KVM/QEMU tap-backed virtio-net deployments a tenant VM needs no host account or capability; exploitation uses only the pre-provisioned virtual NIC, not init-namespace root or CAP_NET_ADMIN on the host.\nUI:N - Packet injection, ip_defrag reassembly, and GSO segmentation run automatically in softirq once crafted virtio fragments are sent; no victim mount, click, or other cooperative action is required.\nS:C - A guest VM tenant can panic the host kernel by crossing the hypervisor virtio/tap boundary, impacting resources outside the guest security authority even though the demonstrated primitive is denial of service rather than full escape.\nC:N - Impact is an intentional BUG_ON in skb_segment() frag_list handling; there is no demonstrated out-of-bounds read, use-after-free, or other information-disclosure primitive before the assertion aborts.\nI:N - The failure aborts in skb_segment() before any out-of-bounds write, page-desc conversion, or control-flow hijack; attacker-controlled metadata only reaches a defensive assertion, not a memory modification primitive.\nA:H - Triggering skb_segment() BUG_ON from tun_rx/tun_get_user runs with BH disabled and causes a fatal kernel panic, fully and repeatedly denying availability of the affected host until reboot."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-31T06:12:21.989Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cfdbc8c2e6f9ef5d8b8e54859da03dfe682b0bee"
        },
        {
          "url": "https://git.kernel.org/stable/c/29dda278a5ed272f2230ff4eaa23cf403107bba0"
        },
        {
          "url": "https://git.kernel.org/stable/c/14a8f3e10fa9a5abd6cedcdaa0c0b7ea9a09f234"
        },
        {
          "url": "https://git.kernel.org/stable/c/3edf721bb4b99d272c336631b44e3d8ff9a4f31b"
        },
        {
          "url": "https://git.kernel.org/stable/c/dec2edb7aaf12a8878b3a03172ea8fc277b8eaad"
        },
        {
          "url": "https://git.kernel.org/stable/c/c49f04e8d2b94dbb8d9fd99731dd3f00589c8ace"
        },
        {
          "url": "https://git.kernel.org/stable/c/69b73b74d9eb45f5560a8fe4fa406ada580e1340"
        },
        {
          "url": "https://git.kernel.org/stable/c/da857e448322a2e871ce3ecc2900027041160d43"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5dc1e69fd7258ea605c9952e5d5947539159ae3"
        }
      ],
      "title": "inet: frags: strip GSO state from fragments before reassembly",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80590",
    "datePublished": "2026-08-28T06:35:12.516Z",
    "dateReserved": "2026-08-26T14:34:25.770Z",
    "dateUpdated": "2026-08-31T06:12:21.989Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Action not permitted

OPENSUSE-SU-2026:11648-1

CVE-2026-80590 (GCVE-0-2026-80590)

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