CVE-2015-4491

MEDIUMCVSS v2 · 6.86.8—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 6.8 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:M/Au:N/C:P/I:P/A:P. 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 8.4% 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
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 8.4%CVSS v2: 6.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Integer overflow in the make_filter_table function in pixops/pixops.c in gdk-pixbuf before 2.31.5, as used in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 on Linux, Google Chrome on Linux, and other products, allows remote attackers to execute arbitrary code or cause a denial of service (heap-based buffer overflow and application crash) via crafted bitmap dimensions that are mishandled during scaling.

CVSS v2.0 (legacy)
6.8MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
6.8MEDIUMlow confidence
EG Risk
38
EG Risk 38/100CISA SSVC

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
Severity68% × 45%
Exploitation8% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
8.4%
EPSS %ILE
94th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 16, 2015

Last Modified

May 6, 2026

References (64)

Patch Availability(6)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibgdk-pixbuf2.0-0 (2.31.3-1ubuntu0.1) @ vivid2026-05-23ubuntu
ubuntuthunderbird (1:38.2.0+build1-0ubuntu0.15.04.1) @ vivid2026-05-23ubuntu
ubuntufirefox (40.0+build4-0ubuntu0.12.04.1) @ precise2026-05-23ubuntu
redhatgdk-pixbuf2-0:2.28.2-5.ael7b_12015-08-31redhat
redhatthunderbird-0:38.2.0-1.el7_12015-08-25redhat
redhatfirefox-0:38.2.0-4.el7_12015-08-11redhat

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.

Affected Packages

(11 across 7 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
gdk-pixbuf—
  • every version up to 2.31.7-1: fixed in 2.31.7-1
—
gtk+2.0—
  • every version up to 2.21.5-1: fixed in 2.21.5-1
—
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
gdk-pixbuf—
  • every version up to 2.31.7-1: fixed in 2.31.7-1
—
gtk+2.0—
  • every version up to 2.21.5-1: fixed in 2.21.5-1
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
gdk-pixbuf—
  • every version up to 2.31.7-1: fixed in 2.31.7-1
—
gtk+2.0—
  • every version up to 2.21.5-1: fixed in 2.21.5-1
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
gdk-pixbuf—
  • every version up to 2.31.7-1: fixed in 2.31.7-1
—
gtk+2.0—
  • every version up to 2.21.5-1: fixed in 2.21.5-1
—
Debian:6.0(1)
PackageVulnerable rangeFix by version rangeDependents
gtk+2.02.20.1-2
  • every version up to 2.20.1-2+deb6u2: fixed in 2.20.1-2+deb6u2
—
Debian:7(1)
PackageVulnerable rangeFix by version rangeDependents
gdk-pixbuf2.26.1-1, 2.26.1-1+deb7u1, 2.26.1-1+deb7u2
  • every version up to 2.26.1-1+deb7u1: fixed in 2.26.1-1+deb7u1
  • every version up to 2.26.1-1+deb7u3: fixed in 2.26.1-1+deb7u3
—
Debian:8(1)
PackageVulnerable rangeFix by version rangeDependents
gdk-pixbuf2.31.1-2, 2.31.1-2+deb8u1, 2.31.1-2+deb8u2, 2.31.1-2+deb8u3
  • every version up to 2.31.1-2+deb8u2: fixed in 2.31.1-2+deb8u2
  • every version up to 2.31.1-2+deb8u4: fixed in 2.31.1-2+deb8u4
—

All Vendor Advisories

(6)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 20× 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 147 total refreshes for this CVE.

  1. 2026-10-05 17:38 UTCEPSS rescore
  2. 2026-10-04 23:17 UTCEPSS rescore
  3. 2026-10-03 14:21 UTCEPSS rescore
  4. 2026-10-01 19:43 UTCEPSS rescore
  5. 2026-09-30 14:58 UTCEPSS rescore
  6. 2026-09-30 09:04 UTCEG score recompute
  7. 2026-09-28 13:45 UTCEPSS rescore
  8. 2026-09-27 13:40 UTCEPSS rescore
  9. 2026-09-27 13:40 UTCEPSS rescore
  10. 2026-09-26 15:53 UTCEPSS rescore
  11. 2026-09-19 15:35 UTCEPSS rescore
  12. 2026-09-19 09:06 UTCOSV refresh
  13. 2026-09-18 19:22 UTCEPSS rescore
  14. 2026-09-17 19:21 UTCEPSS rescore
  15. 2026-09-15 03:05 UTCEPSS rescore
  16. 2026-09-12 14:55 UTCEPSS rescore
  17. 2026-09-11 09:31 UTCEPSS rescore
  18. 2026-09-10 09:26 UTCEPSS rescore
  19. 2026-09-07 15:56 UTCEPSS rescore
  20. 2026-09-06 13:42 UTCEPSS rescore
  21. 2026-09-05 15:23 UTCEPSS rescore
  22. 2026-09-04 13:55 UTCEPSS rescore
  23. 2026-09-02 14:07 UTCEPSS rescore
  24. 2026-09-01 03:31 UTCEPSS rescore
  25. 2026-08-31 12:34 UTCOSV refresh
Show 75 more
  1. 2026-08-30 19:12 UTCEPSS rescore
  2. 2026-08-27 14:20 UTCEPSS rescore
  3. 2026-08-26 14:41 UTCEPSS rescore
  4. 2026-08-25 13:44 UTCEPSS rescore
  5. 2026-08-21 23:44 UTCEPSS rescore
  6. 2026-08-20 22:50 UTCEPSS rescore
  7. 2026-08-19 16:59 UTCEPSS rescore
  8. 2026-08-18 13:43 UTCEPSS rescore
  9. 2026-08-16 14:51 UTCEPSS rescore
  10. 2026-08-16 02:09 UTCEPSS rescore
  11. 2026-08-15 01:25 UTCEPSS rescore
  12. 2026-08-14 17:54 UTCOSV refresh
  13. 2026-08-12 13:46 UTCEPSS rescore
  14. 2026-08-08 16:31 UTCEPSS rescore
  15. 2026-08-07 16:22 UTCEPSS rescore
  16. 2026-08-06 13:42 UTCEPSS rescore
  17. 2026-08-05 19:12 UTCEPSS rescore
  18. 2026-08-04 15:04 UTCEPSS rescore
  19. 2026-08-02 02:22 UTCEPSS rescore
  20. 2026-08-01 04:11 UTCEPSS rescore
  21. 2026-07-30 16:23 UTCEPSS rescore
  22. 2026-07-30 06:24 UTCOSV refresh
  23. 2026-07-30 01:26 UTCEPSS rescore
  24. 2026-07-28 15:31 UTCEPSS rescore
  25. 2026-07-26 14:50 UTCEPSS rescore
  26. 2026-07-26 13:54 UTCEG score recompute▲ 6.80
  27. 2026-07-24 14:13 UTCEPSS rescore
  28. 2026-07-23 14:14 UTCEPSS rescore
  29. 2026-07-23 01:18 UTCEG score recompute
  30. 2026-07-23 00:20 UTCEG score recompute
  31. 2026-07-22 21:58 UTCEG score recompute
  32. 2026-07-22 14:04 UTCEPSS rescore
  33. 2026-07-21 15:21 UTCEPSS rescore
  34. 2026-07-21 15:21 UTCEPSS rescore
  35. 2026-07-20 17:03 UTCEPSS rescore
  36. 2026-07-19 14:27 UTCEPSS rescore
  37. 2026-07-19 14:27 UTCEPSS rescore
  38. 2026-07-19 02:26 UTCEPSS rescore
  39. 2026-07-19 02:26 UTCEPSS rescore
  40. 2026-07-18 10:00 UTCEPSS rescore
  41. 2026-07-16 16:59 UTCEPSS rescore
  42. 2026-07-16 16:59 UTCEPSS rescore
  43. 2026-07-15 16:54 UTCEPSS rescore
  44. 2026-07-15 16:54 UTCEPSS rescore
  45. 2026-07-15 01:56 UTCEPSS rescore
  46. 2026-07-13 22:26 UTCEPSS rescore
  47. 2026-07-12 15:38 UTCOSV refresh
  48. 2026-07-12 05:42 UTCEPSS rescore
  49. 2026-07-11 08:23 UTCEPSS rescore
  50. 2026-07-09 19:05 UTCEPSS rescore
  51. 2026-07-08 15:10 UTCEPSS rescore
  52. 2026-07-07 13:42 UTCEPSS rescore
  53. 2026-07-06 02:20 UTCEPSS rescore
  54. 2026-07-05 02:26 UTCEPSS rescore
  55. 2026-07-04 06:27 UTCEPSS rescore
  56. 2026-07-02 15:21 UTCEPSS rescore
  57. 2026-07-01 15:02 UTCEPSS rescore
  58. 2026-07-01 15:02 UTCEPSS rescore
  59. 2026-06-30 23:19 UTCEPSS rescore
  60. 2026-06-30 23:19 UTCEPSS rescore
  61. 2026-06-28 14:03 UTCEPSS rescore
  62. 2026-06-28 04:53 UTCEPSS rescore
  63. 2026-06-27 03:05 UTCEPSS rescore
  64. 2026-06-25 13:47 UTCEPSS rescore
  65. 2026-06-25 13:47 UTCEPSS rescore
  66. 2026-06-24 14:02 UTCEPSS rescore
  67. 2026-06-24 14:02 UTCEPSS rescore
  68. 2026-06-23 21:30 UTCEPSS rescore
  69. 2026-06-23 21:20 UTCOSV refresh
  70. 2026-06-22 14:23 UTCEPSS rescore
  71. 2026-06-22 14:22 UTCEPSS rescore
  72. 2026-06-21 01:57 UTCEPSS rescore
  73. 2026-06-21 01:57 UTCEPSS rescore
  74. 2026-06-18 17:50 UTCEPSS rescore
  75. 2026-06-18 17:49 UTCEPSS rescore

Related CVEs(same product + same vendor)

Frequently asked(4)

What is CVE-2015-4491?
CVE-2015-4491 is a medium vulnerability published on August 16, 2015. Integer overflow in the makefiltertable function in pixops/pixops.c in gdk-pixbuf before 2.31.5, as used in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 on Linux, Google Chrome on Linux, and other products, allows remote attackers to execute arbitrary code or cause a denial of…
When was CVE-2015-4491 disclosed?
CVE-2015-4491 was first published on August 16, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-4491 actively exploited?
CVE-2015-4491 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8.4% probability of exploitation in the next 30 days (94th percentile of EPSS-scored CVEs).
How do I remediate CVE-2015-4491?
A fix for CVE-2015-4491 is available: update to the fixed version the vendor names in its advisory.

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