CVE-2011-5327

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-04-22. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 4%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In the Linux kernel before 3.1, an off by one in the drivers/target/loopback/tcm_loop.c tcm_loop_make_naa_tpg() function could result in at least memory corruption.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
88.4%
KEV
Not listed

Published

July 27, 2019

Last Modified

November 21, 2024

Advisory Details (5)

Auto-updated May 27, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

myF5

https://support.f5.com/csp/article/K42315210?utm_source=f5support&amp%3Butm_medium=RSS
generic

myF5

https://support.f5.com/csp/article/K42315210
generic
https://mirrors.edge.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1
github_commit

commit 12f09ccb4612 (torvalds/linux)

Fix landed in torvalds/linux commit 12f09ccb4612 — awaiting tagged release

https://github.com/torvalds/linux/commit/12f09ccb4612734a53e47ed5302e0479c10a50f8
generic

loopback: off by one in tcm_loop_make_naa_tpg() - kernel/git/torvalds/linux.git - Linux kernel source tree

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=12f09ccb4612734a53e47ed5302e0479c10a50f8

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 39× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-13 22:25 UTCEPSS rescore
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  1. 2026-06-21 14:53 UTCEPSS rescore
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  41. 2026-05-27 16:48 UTCEG score recompute
  42. 2026-05-27 16:48 UTCGHSA enrichment
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  50. 2026-05-24 16:43 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2011-5327?
CVE-2011-5327 is a critical vulnerability published on July 27, 2019. In the Linux kernel before 3.1, an off by one in the drivers/target/loopback/tcmloop.c tcmloopmakenaa_tpg() function could result in at least memory corruption.
When was CVE-2011-5327 disclosed?
CVE-2011-5327 was first published in the National Vulnerability Database on July 27, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-5327 actively exploited?
CVE-2011-5327 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 88.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2011-5327?
CVE-2011-5327 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2011-5327?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-5327, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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