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CVE-2026-90057— slip: remove slip_hangup() to fix use-after-free in slip_receive_buf()

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，以下漏洞已得到修复： slip：移除 slip_hangup()，以修复 slip_receive_buf() 中的“使用已释放内存”（use-after-free）问题 Jaeyoung Chung 和 Eulgyu Kim 报告了在 slip_receive_buf() 中发生 slab 使用已释放内存的读取错误，该错误发生在与 tty 挂起（hangup）发生竞争条件时。 tty_ldisc_hangup() 在仅持有 tty->ldisc_sem 的读锁（通过 tty_ldisc_r

CVSS 7.8 · High EPSS 0.17% · P6

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 5342b77c4123ba39f911d92a813295fb3bb21f69< 9a3b1edff1ecb47d323f2506b3ffc22178acd1c6 affected
5342b77c4123ba39f911d92a813295fb3bb21f69< a2dbac3fb03b4427ccf057debc83fc61ee102529 affected
5342b77c4123ba39f911d92a813295fb3bb21f69< de1f978c0f6ab42b28192d74dc59af52fdc76135 affected
5342b77c4123ba39f911d92a813295fb3bb21f69< ddbc5dc5a2e29b3934da09c1ba3c930fd8a40fd6 affected
5342b77c4123ba39f911d92a813295fb3bb21f69< a540a49fcca59d1c92c3a6462e67ca21676a88df affected
5342b77c4123ba39f911d92a813295fb3bb21f69< 23c53269f2baaedf2d92784290cb9ef6db2a3bce affected
2.6.32 affected
< 2.6.32 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-90057

Vulnerability Information
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Vulnerability Title
slip: remove slip_hangup() to fix use-after-free in slip_receive_buf()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: slip: remove slip_hangup() to fix use-after-free in slip_receive_buf() Jaeyoung Chung and Eulgyu Kim reported a slab-use-after-free read in slip_receive_buf() when racing against tty hangup. tty_ldisc_hangup() calls ld->ops->hangup() while holding only a read lock on tty->ldisc_sem (via tty_ldisc_ref()). Because slip_hangup() simply called slip_close(), it ran concurrently with reader functions such as slip_receive_buf(). slip_close() unregisters and frees the net device and its private struct slip, causing concurrent reader threads in slip_receive_buf() to dereference freed memory. Line discipline close() is already guaranteed to be called under the write lock of tty->ldisc_sem during hangup processing (in tty_ldisc_reinit() or tty_ldisc_kill()). Remove slip_hangup() so teardown is serialized cleanly by slip_close().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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 5342b77c4123ba39f911d92a813295fb3bb21f69 ~ 9a3b1edff1ecb47d323f2506b3ffc22178acd1c6 -
Linux Linux 2.6.32 -

II. Public POCs for CVE-2026-90057

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III. Intelligence Information for CVE-2026-90057

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Patches & Fixes for CVE-2026-90057 (6)

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

CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
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-2026-90110 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-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-90286 8.8 HIGH drm/amdgpu/gfx6: Use PFP on the compute queues too
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90255 8.8 HIGH Bluetooth: hci_conn: fix the SCO setup context lifetime
CVE-2026-90162 8.8 HIGH ksmbd: defer publishing granted locks to prevent UAF/double-free race
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
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
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash

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-2026-90057

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