CVE-2009-1895

HIGHCVSS v2 · 7.27.2—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 7.2 — v2 rates that HIGH (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:L/AC:L/Au:N/C:C/I:C/A:C. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 0.4% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
7.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS v2: 7.2Exploit: None knownExposed: 0

A fix is available — apply it.

The personality subsystem in the Linux kernel before 2.6.31-rc3 has a PER_CLEAR_ON_SETID setting that does not clear the ADDR_COMPAT_LAYOUT and MMAP_PAGE_ZERO flags when executing a setuid or setgid program, which makes it easier for local users to leverage the details of memory usage to (1) conduct NULL pointer dereference attacks, (2) bypass the mmap_min_addr protection mechanism, or (3) defeat address space layout randomization (ASLR).

CVSS v2.0 (legacy)
7.2HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
7.2(low)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity72% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

July 16, 2009

Last Modified

April 23, 2026

References (70)

Vendor Advisories for CVE-2009-1895(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-2.6.28-14-virtual (2.6.28-14.47) @ jaunty2026-05-30ubuntu
redhatkernel-0:2.6.18-92.1.35.el52010-02-02redhat
redhatkernel-0:2.4.21-63.EL2009-11-03redhat
redhatkernel-rt-0:2.6.24.7-137.el5rt2009-11-03redhat
redhatkernel-0:2.6.9-89.0.11.EL2009-09-15redhat
redhatkernel-0:2.6.18-128.4.1.el52009-08-04redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 36× 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.

Showing the most recent 100 of 104 total refreshes for this CVE.

  1. 2026-07-26 13:38 UTCEG score recompute▲ 7.20
  2. 2026-07-25 14:12 UTCEPSS rescore
  3. 2026-07-24 14:12 UTCEPSS rescore
  4. 2026-07-23 14:14 UTCEPSS rescore
  5. 2026-07-23 00:59 UTCEG score recompute
  6. 2026-07-23 00:37 UTCEG score recompute
  7. 2026-07-23 00:03 UTCEG score recompute
  8. 2026-07-22 21:42 UTCEG score recompute
  9. 2026-07-22 14:03 UTCEPSS rescore
  10. 2026-07-21 15:20 UTCEPSS rescore
  11. 2026-07-20 17:03 UTCEPSS rescore
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  26. 2026-06-18 17:49 UTCEPSS rescore
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  48. 2026-06-05 06:07 UTCEPSS rescore
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  57. 2026-05-31 00:13 UTCEPSS rescore
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  59. 2026-05-30 16:07 UTCEG score recompute
  60. 2026-05-30 16:07 UTCVendor advisory
  61. 2026-05-30 16:07 UTCGHSA enrichment
  62. 2026-05-29 13:40 UTCEPSS rescore
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  75. 2026-05-20 22:37 UTCEPSS rescore

Frequently asked(4)

What is CVE-2009-1895?
CVE-2009-1895 is a high vulnerability published on July 16, 2009. The personality subsystem in the Linux kernel before 2.6.31-rc3 has a PERCLEARONSETID setting that does not clear the ADDRCOMPATLAYOUT and MMAPPAGEZERO flags when executing a setuid or setgid program, which makes it easier for local users to leverage the details of memory usage to (1) conduct NULL…
When was CVE-2009-1895 disclosed?
CVE-2009-1895 was first published in the National Vulnerability Database on July 16, 2009, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2009-1895 actively exploited?
CVE-2009-1895 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 64.0% of all scored CVEs.
How do I remediate CVE-2009-1895?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-1895, 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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