CVE-2011-1021: n/a vulnerability

CVE-2011-1021: drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary kernel memory...

drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary kernel memory locations by leveraging root privileges to write to the /sys/kernel/debug/acpi/custom_method file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4347.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 22:14 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2011-1021 is a Linux kernel ACPI debugfs flaw in kernels before 3.0. A local user with root-level ability to write a specific debugfs file could alter kernel memory, undermining kernel integrity. This mainly matters for legacy Linux systems and products still running old or vendor-backported kernels. Exposure is most plausible on legacy Linux kernels before 3.0, or vendor kernels lacking the backported upstream fix. The source bundle does not identify specific distributions, appliances, configurations, or CPEs as affected. Treat this as a legacy platform risk. It is not flagged as actively exploited in the provided evidence, but affected old kernels allow privileged local users to undermine kernel integrity. Prioritize remediation where outdated Linux hosts support regulated, internet-facing, or shared-user workloads. Mitigation focus: Upgrade to a kernel containing the upstream fix or a vendor backport.; Verify vendor advisories for legacy supported kernels before assuming version numbers are sufficient.; Remove or retire systems still running unsupported pre-3.0 Linux kernels..

Prepared: Jun 24, 2026, 12:34 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: Jun 21, 2012, 23:00 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

3Source 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://github.com/torvalds/linux/commit/526b4af47f44148c9d665e57723ed9f86634c6e3CVE reference · x_refsource_CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=680841CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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