CVE-2015-4170: n/a vulnerability

CVE-2015-4170: Race condition in the ldsem_cmpxchg function in drivers/tty/tty_ldsem.c in the Linux kernel before 3.13-rc4...

Race condition in the ldsem_cmpxchg function in drivers/tty/tty_ldsem.c in the Linux kernel before 3.13-rc4-next-20131218 allows local users to cause a denial of service (ldsem_down_read and ldsem_down_write deadlock) by establishing a new tty thread during shutdown of a previous tty thread.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 06:04 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2015-4170 is a Linux kernel bug where a local user could trigger a terminal subsystem deadlock. The practical impact is denial of service, not data theft or remote compromise based on the supplied sources. Exposure is most relevant on legacy Linux systems or downstream vendor kernels carrying the vulnerable tty_ldsem code. The bundle does not provide a complete affected distribution or package matrix. Treat this as a legacy Linux availability risk. It should be remediated through normal kernel patching, with higher urgency on shared servers, bastions, and systems offering local user access. Mitigation focus: Apply the relevant kernel security update from the system vendor.; Confirm vendor kernels include the upstream tty_ldsem fix or an equivalent backport.; Prioritize multi-user systems where untrusted local shell access exists..

Prepared: Jun 13, 2026, 14:44 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 2, 2016, 10:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.redhat.com/show_bug.cgi?id=1218879CVE reference · x_refsource_CONFIRM
https://github.com/torvalds/linux/commit/cf872776fc84128bb779ce2b83a37c884c3203aeCVE reference · x_refsource_CONFIRM
https://www.kernel.org/pub/linux/kernel/next/patch-v3.13-rc4-next-20131218.xzCVE reference · x_refsource_CONFIRM
RHSA-2016:1395CVE reference · vendor-advisory, x_refsource_REDHAT

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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