CVE-2026-98233— net/packet: clear RX owner on VNET header error
Quick assessment
Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Linux 内核中，已修复以下漏洞： net/packet：在 VNET 头错误时清除 RX 所有者标志 提交 61fad6816fc1（“net/packet: tpacket_rcv: 避免生产者竞态条件”）引入了 rx_owner_map，并使 tpacket_rcv() 在转换 virtio-net 头之前先声明 V1 或 V2 环形缓冲区中的一个槽位。如果转换失败，数据丢弃路径会保留该槽位的声明状态。 在使用单帧 TPACKET_V2 环形缓冲区的情况下，不支持的 UDP GSO 数据包会导致唯一的槽
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 26
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 61fad6816fc10fb8793a925d5c1256d1c3db0cd2< bb10a0084c03a94364aeec542beddc5d49b59f59 |
affected |
61fad6816fc10fb8793a925d5c1256d1c3db0cd2< b8c0cb3069058c2d67b5c7c833b2833381ecffdc |
affected | ||
61fad6816fc10fb8793a925d5c1256d1c3db0cd2< 2daa618e7ff19eefcbda281bc4c5998c4140f9cf |
affected | ||
61fad6816fc10fb8793a925d5c1256d1c3db0cd2< 23cd30498891d29a69ec9b75bd92f8a0f21f1342 |
affected | ||
61fad6816fc10fb8793a925d5c1256d1c3db0cd2< 49a48a5aaf85fe69d2dc3fb334b4854fadf44e39 |
affected | ||
61fad6816fc10fb8793a925d5c1256d1c3db0cd2< 805edbdcb8681da5f7ee43b3c3c809f7a8c31208 |
affected | ||
61fad6816fc10fb8793a925d5c1256d1c3db0cd2< 693209a237fc548791cf402441db8b68d1da7d38 |
affected | ||
61fad6816fc10fb8793a925d5c1256d1c3db0cd2< 33ff111d7ba3beb86e28938d6382bb5beabd865a |
affected | ||
| … +18 more rows | |||
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I. Basic Information for CVE-2026-98233
Vulnerability Information
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Vulnerability Title
net/packet: clear RX owner on VNET header error
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net/packet: clear RX owner on VNET header error
Commit 61fad6816fc1 ("net/packet: tpacket_rcv: avoid a producer race
condition") added rx_owner_map and made tpacket_rcv() claim a V1 or V2
ring slot before converting the virtio-net header. If the conversion
fails, the drop path leaves the slot claimed.
With a one-frame TPACKET_V2 ring, an unsupported UDP GSO packet leaves
the only slot unavailable, so the ring also drops the next valid packet.
Clear the ownership bit on this error path. TPACKET_V3 already clears
its block state here.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-98233
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2026-98233 (8)
Same Patch Batch · Linux · 2026-10-06 · 208 CVEs total
| CVE-2026-98323 | 9.8 CRITICAL | RDMA/siw: Bound fragmented header copies by the remaining length |
| CVE-2026-98365 | 9.8 CRITICAL | RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access |
| CVE-2026-98282 | 8.8 HIGH | powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba |
| CVE-2026-98283 | 8.8 HIGH | KVM: PPC: Book3S HV: fix use-after-free in kvmhv_emulate_tlbie_all_lpid() |
| CVE-2026-98339 | 8.8 HIGH | wifi: cfg80211: don't filter by BSS type when removing stale entries |
| CVE-2026-98171 | 8.8 HIGH | smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs |
| CVE-2026-98261 | 8.1 HIGH | cifs: Fix server use-after-free in cifs_chan_skip_or_disable() |
| CVE-2026-98357 | 8.1 HIGH | IB/isert: wait for deferred control PDU completions before releasing the connection |
| CVE-2026-98239 | 8.1 HIGH | net: lan743x: fix RX checksum use-after-free |
| CVE-2026-98341 | 7.8 HIGH | wifi: cfg80211: don't free driver-owned scan requests |
| CVE-2026-98324 | 7.8 HIGH | dmaengine: pxa: fix double counting of the hw descriptors |
| CVE-2026-98320 | 7.8 HIGH | netfilter: flowtable: hold reference on ct until flow is released |
| CVE-2026-98228 | 7.8 HIGH | mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ |
| CVE-2026-98229 | 7.8 HIGH | xfrm: save input state data before secpath resets |
| CVE-2026-98318 | 7.8 HIGH | smb: client: validate absolute native symlink targets before NT fixups |
| CVE-2026-98315 | 7.8 HIGH | ntfs: protect runlist updates with the runlist lock |
| CVE-2026-98260 | 7.8 HIGH | exec: Cleanup POSIX timers right after de_thread() |
| CVE-2026-98256 | 7.8 HIGH | signal: Prevent exec() race |
| CVE-2026-98258 | 7.8 HIGH | posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list |
| CVE-2026-98254 | 7.8 HIGH | swiotlb: use the adjusted address for the highmem page lookup |
Showing top 20 of 208 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
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CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
Same vendor: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
V. Comments for CVE-2026-98233
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