CVE-2026-97995— virtio_console: do not free control-out buffers on remove
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： virtio_console：在设备移除时不要释放控制输出缓冲区 将 作为控制输出 virtqueue 的 cookie（标记/指针）发布。 会遍历所有 virtqueue，并将残留的 cookie 传递给 。而 会将其视为 类型，并读取其中的 （散射/聚集页面）。 如果设备被解绑（unbind）时，控制消息仍位于 （控制输出队列）中， 就会读取超出 对象边界的数据。 KASAN（内核地址sanitize器）报告在 中发生了 slab 越界访问错误： 该对象是在 中分配的
Affected Version Matrix 32
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b< b1f39c2a676698cc64c8e105e08b25111a112ec6 |
affected |
a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b< e03522a990cd2e0f1a736eaa349a9df9ab8541c3 |
affected | ||
a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b< 8f6cfc3eca79b8e108d0823756101e2f4f9d811f |
affected | ||
a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b< 2e40c69b9c3448b9c6609cd02013da593b2e123b |
affected | ||
a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b< 177ee901aa2bab02e7f1f8edbb814fd5e386ed62 |
affected | ||
a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b< a80c33488e0bbe642ed803b13a4ac8078a70b507 |
affected | ||
a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b< f620c40ea6862feed84deb105568b21ec53a7830 |
affected | ||
a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b< 894f98e73983f37354214a89a3a7fd35bf9e3072 |
affected | ||
| … +24 more rows | |||
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I. Basic Information for CVE-2026-97995
Vulnerability Information
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Vulnerability Title
virtio_console: do not free control-out buffers on remove
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
virtio_console: do not free control-out buffers on remove
__send_control_msg() publishes &portdev->cpkt as the control-out
virtqueue cookie. remove_vqs() walks every virtqueue and passes leftover
cookies to free_buf(), which treats them as struct port_buffer and
reads sgpages.
If a control message is still on c_ovq when the device is unbound,
free_buf() reads past the ports_device object.
KASAN reported slab-out-of-bounds in free_buf():
free_buf
remove_vqs
virtcons_remove
unbind_store
The object was the ports_device allocated in virtcons_probe().
Drain c_ovq without freeing. The packet lives in portdev and is released
with it.
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-2026-97995
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-97995 (8)
Same Patch Batch · Linux · 2026-09-25 · 372 CVEs total
| CVE-2026-100075 | 9.8 CRITICAL | RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters |
| CVE-2026-97555 | 8.8 HIGH | smb: client: fix heap overflow in DACL owner/group rewrite |
| CVE-2026-97957 | 8.8 HIGH | net: hinic: fix mailbox segment buffer overflow |
| CVE-2026-97527 | 8.8 HIGH | scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock |
| CVE-2026-97528 | 8.8 HIGH | scsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error |
| CVE-2026-98115 | 8.8 HIGH | ksmbd: safely drain sessions during logoff |
| CVE-2026-97525 | 8.2 HIGH | x86/mm/pat: Allocate split page tables as kernel page tables |
| CVE-2026-98069 | 8.1 HIGH | net/rds: acquire the fastpath locks in rds_conn_shutdown() |
| CVE-2026-97573 | 8.1 HIGH | bnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset() |
| CVE-2026-97570 | 8.1 HIGH | bnxt_en: Bound SW TPA IDs to prevent crashes |
| CVE-2026-98130 | 8.1 HIGH | sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START |
| CVE-2026-98070 | 8.1 HIGH | net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks() |
| CVE-2026-97941 | 7.8 HIGH | mm/slab: take n->list_lock in __slab_try_return_freelist() to avoid race |
| CVE-2026-97575 | 7.8 HIGH | media: v4l2-ctrls: validate AV1 tile counts |
| CVE-2026-97576 | 7.8 HIGH | media: v4l2-ctrls: validate HEVC tile counts |
| CVE-2026-98002 | 7.8 HIGH | iommu/amd: Fix ineffective error check in nested domain allocation |
| CVE-2026-98112 | 7.8 HIGH | ksmbd: fix listener task lifetime on netdev events |
| CVE-2026-97937 | 7.8 HIGH | ftrace: fork: Initialize function graph state before copy_exec_state() |
| CVE-2026-97580 | 7.8 HIGH | media: rkvdec: bound HEVC tile loops and PPS id to the array capacity |
| CVE-2026-97940 | 7.8 HIGH | ipv6: fix fib6 walker UAF on seq stop |
Showing top 20 of 372 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 -
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
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
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