CVE-2009-2847

NONECVSS 0.0Weaponized
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 1%CVSS: —Exploit: NoneExposed: 0

A fix is available — apply it.

The do_sigaltstack function in kernel/signal.c in Linux kernel 2.4 through 2.4.37 and 2.6 before 2.6.31-rc5, when running on 64-bit systems, does not clear certain padding bytes from a structure, which allows local users to obtain sensitive information from the kernel stack via the sigaltstack function.

CVSS v3
—
EG Score
0.0(none)
EG Risk
0
EG Risk 0/100

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. It is distinct from the 0–10 EG Score, which measures severity.

EPSS
57.2%
KEV
Not listed

Published

August 18, 2009

Last Modified

April 23, 2026

References (42)

Vendor Advisories for CVE-2009-2847(1)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-2.6.28-16-imx51 (2.6.28-16.55) @ jaunty2026-05-30ubuntu
redhatkernel-0:2.6.18-128.8.1.el52009-09-29redhat
redhatkernel-0:2.6.9-89.0.11.EL2009-09-15redhat
redhatkernel-0:2.6.18-164.el52009-09-02redhat
redhatkernel-rt-0:2.6.24.7-132.el5rt2009-09-01redhat

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

(4)

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 10× 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. 2026-07-23 00:59 UTCEG score recompute
  2. 2026-07-23 00:37 UTCEG score recompute
  3. 2026-07-23 00:04 UTCEG score recompute
  4. 2026-07-22 21:43 UTCEG score recompute
  5. 2026-07-22 14:03 UTCEPSS rescore
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  1. 2026-07-01 15:02 UTCEPSS rescore
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  53. 2026-05-31 00:13 UTCEPSS rescore
  54. 2026-05-31 00:13 UTCEPSS rescore
  55. 2026-05-30 15:46 UTCEG score recompute
  56. 2026-05-30 15:46 UTCVendor advisory
  57. 2026-05-30 15:46 UTCGHSA enrichment
  58. 2026-05-29 13:40 UTCEPSS rescore
  59. 2026-05-28 13:42 UTCEPSS rescore
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-9352✓ verified
    First seen Aug 4, 2009

    Linux Kernel 2.6.31-rc5 - sigaltstack 4-Byte Stack Disclosure

    Open source ↗

Related CVEs(same vendor)

Frequently asked(4)

What is CVE-2009-2847?
CVE-2009-2847 is a none vulnerability published on August 18, 2009. The do_sigaltstack function in kernel/signal.c in Linux kernel 2.4 through 2.4.37 and 2.6 before 2.6.31-rc5, when running on 64-bit systems, does not clear certain padding bytes from a structure, which allows local users to obtain sensitive information from the kernel stack via the sigaltstack…
When was CVE-2009-2847 disclosed?
CVE-2009-2847 was first published in the National Vulnerability Database on August 18, 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-2009-2847 actively exploited?
CVE-2009-2847 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 57.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2009-2847?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-2847, 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.

Dependency Blast Radius

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