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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-90334— tty: clear cdev pointer after cdev_add() failure

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： tty：在 失败后清除 cdev 指针 当 调用失败时， 会释放 cdev 引用，但 仍指向已释放的内存（悬空指针）。随后， 将这个失效的指针传递给 ，从而导致释放后使用（use-after-free）错误。 修复方式：在释放引用后，将对应槽位的指针清空。

AI Predicted 7.0 Difficulty: Hard EPSS 0.21% · P10

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux c1a752ba2d6b8a52879c7ab637cff38359ea9827< fb1de260033c215dba438973d82b48562bdc86bb affected
c1a752ba2d6b8a52879c7ab637cff38359ea9827< e9e64dd02fd68776afda00777591eca0c3984285 affected
c1a752ba2d6b8a52879c7ab637cff38359ea9827< 33a44333a9dfda044b0e233399b12ead7f8a90ae affected
c1a752ba2d6b8a52879c7ab637cff38359ea9827< d331c63570af61ef7aaf516b64a8d6f47518a3a4 affected
c1a752ba2d6b8a52879c7ab637cff38359ea9827< a83fcddf3c75d004f12aa13555bb73da19fb75a9 affected
c1a752ba2d6b8a52879c7ab637cff38359ea9827< 4f6bd79bb7e55095f09bec9b4eb6c09df1306116 affected
c1a752ba2d6b8a52879c7ab637cff38359ea9827< 5c5a795bf6248fe96f96dd9fd79d66bbb4a92077 affected
c1a752ba2d6b8a52879c7ab637cff38359ea9827< 6645856f0df3aeecd45519cb611415b4b89c2223 affected
… +10 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-90334

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
tty: clear cdev pointer after cdev_add() failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: tty: clear cdev pointer after cdev_add() failure tty_cdev_add() drops the cdev reference when cdev_add() fails, but leaves driver->cdevs[index] pointing to freed memory. tty_unregister_device() later passes that stale pointer to cdev_del(), causing a use-after-free. Clear the slot after dropping the reference.
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 c1a752ba2d6b8a52879c7ab637cff38359ea9827 ~ fb1de260033c215dba438973d82b48562bdc86bb -
Linux Linux 4.3 -

II. Public POCs for CVE-2026-90334

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-90334

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-90334 (8)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90286 8.8 HIGH drm/amdgpu/gfx6: Use PFP on the compute queues too
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90162 8.8 HIGH ksmbd: defer publishing granted locks to prevent UAF/double-free race
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-90334

No comments yet

Leave a comment