Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-90257— Bluetooth: virtio_bt: avoid OOB read of build info string

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，以下漏洞已被修复： 蓝牙：virtio_bt：避免对构建信息字符串的越界读取（OOB read） 函数会发送 Zephyr 厂商命令 （读取构建信息，Read Build Information），并将响应数据作为以 起始的 字符串传递给 和 ，但在传递前未检查数据长度。如果后端仅返回状态码而不返回数据，该指针将指向接收数据结尾之后的位置，导致遍历过程会继续读取相邻的 slab 内存，直到遇到 NUL（ ）字符为止。这些字节最终会出现在内核日志以及固件信息（firmware-info）的 d

AI Predicted 4.4 Difficulty: Moderate

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux afd2daa26c7abd734d78bd274fc6c59a15e61063< fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e affected
afd2daa26c7abd734d78bd274fc6c59a15e61063< d08c99abf06133a7829d46627e77e3315ca974d2 affected
afd2daa26c7abd734d78bd274fc6c59a15e61063< 0e388d805233a883a31271676eae6031dfc9e898 affected
afd2daa26c7abd734d78bd274fc6c59a15e61063< 54e9387eb7546eaa6f600220599d55740956ffc3 affected
afd2daa26c7abd734d78bd274fc6c59a15e61063< be1e3df2c49c91b0a052c6563884e8d39bd768b2 affected
afd2daa26c7abd734d78bd274fc6c59a15e61063< 84ea9c99874804f5ca13f35bbc186ba93902f30f affected
afd2daa26c7abd734d78bd274fc6c59a15e61063< 502adc06ba76dee19c292ae4a07d74d202fe734d affected
5.13 affected
… +8 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-90257

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Bluetooth: virtio_bt: avoid OOB read of build info string
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: virtio_bt: avoid OOB read of build info string The virtbt_setup_zephyr() sends the Zephyr vendor command 0xfc08 (Read Build Information) and hands the response to bt_dev_info() and hci_set_fw_info() as a "%s" string starting at skb->data + 1, without checking the length. A backend that answers with status only leaves that pointer past the end of the received data, so the walk reads adjacent slab memory until it meets a NUL. Those bytes reach the kernel log and the firmware-info debugfs file. To fix this, print the string with a bounded "%.*s" limited to skb->len - 1. A short or unterminated response then prints as much as arrived instead of failing setup. This mirrors commit dd068ef04412 ("Bluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()"), which fixed the identical pattern.
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux afd2daa26c7abd734d78bd274fc6c59a15e61063 ~ fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e -
Linux Linux 5.13 -

II. Public POCs for CVE-2026-90257

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-90257

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-90257 (6)

Other References for CVE-2026-90257 (1)

Same Patch Batch · Linux · 2026-09-17 · 602 CVEs total

CVE-2026-90255 Bluetooth: hci_conn: fix the SCO setup context lifetime
CVE-2026-90238 media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
CVE-2026-90240 iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90239 media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
CVE-2026-90241 iommu/vt-d: Tear down scalable-mode context on probe failure
CVE-2026-90243 iommu/vt-d: Clear Present bit before tearing down copied context entry
CVE-2026-90242 iommu/vt-d: Fix iopf_refcount leak on RID domain replacement
CVE-2026-90244 iommu/dma: Restore locking around msi_page_list
CVE-2026-90245 fbdev: kyro: Validate overlay viewport coordinates
CVE-2026-90246 apparmor: fix integer overflow in verify_tags() bounds check
CVE-2026-90247 bpf: Fix mmap_lock leak in irq_work path
CVE-2026-90248 net/sched: cls_api: fix teardown of an adopted proto on insert-race loss
CVE-2026-90249 iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes
CVE-2026-90250 bpf, cgroup: Fix storage null-ptr-deref after replacing prog
CVE-2026-90251 Bluetooth: MSFT: validate evt_prefix_len against the response length
CVE-2026-90253 Bluetooth: MGMT: free the mesh send cancel command when it is cancelled
CVE-2026-90252 Bluetooth: MGMT: free the HCI command when it is cancelled
CVE-2026-90254 Bluetooth: hci_sync: free the advertising instance on the failure and cancel paths
CVE-2026-90256 Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90267 scsi: sd: Fix special_vec mempool leak when scsi_alloc_sgtables() fails

Showing top 20 of 602 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-90257

No comments yet

Leave a comment