CVE-2016-9842

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5.2%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

The inflateMark function in inflate.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving left shifts of negative integers.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
42
EG Risk 42/100CISA 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
Severity88% × 45%
Exploitation5% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
5.2%
EPSS %ILE
92nd
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). 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

May 23, 2017

Last Modified

July 14, 2026

Advisory Details (5)

Auto-updated Jul 14, 2026
Patch available. Sources: redhat.
redhatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 6 Supplementary and Red Hat Enterprise Linux 7 Supplementary.

https://access.redhat.com/errata/RHSA-2017:1221
redhatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 6 Supplementary and Red Hat Enterprise Linux 7 Supplementary.

https://access.redhat.com/errata/RHSA-2017:1220
generic
http://www.securitytracker.com/id/1039427
generic
http://www.securityfocus.com/bid/95131
generic

oss-security - Re: CVE Request: zlib security issues found during audit

http://www.openwall.com/lists/oss-security/2016/12/05/21

Vendor Advisories for CVE-2016-9842(9)

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

Patch Availability(9)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuzlib1g-udeb (1:1.2.8.dfsg-2ubuntu4.3) @ xenial2026-05-22ubuntu
ubuntursync (3.1.2-2.1ubuntu1.1) @ bionic2026-05-22ubuntu
redhatjava-1.8.0-ibm-1:1.8.0.5.5-1jpp.1.el6_92017-12-13redhat
redhatjava-1.6.0-sun-1:1.6.0.171-1jpp.4.el72017-10-24redhat
redhatjava-1.7.0-oracle-1:1.7.0.161-1jpp.4.el72017-10-24redhat
redhatjava-1.8.0-oracle-1:1.8.0.151-1jpp.5.el72017-10-23redhat
redhatjava-1.8.0-ibm-1:1.8.0.4.5-1jpp.1.el7_32017-05-10redhat
redhatjava-1.7.1-ibm-1:1.7.1.4.5-1jpp.1.el7_32017-05-10redhat
redhatjava-1.6.0-ibm-1:1.6.0.16.45-1jpp.1.el6_92017-05-10redhat

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

(15 across 9 ecosystems)
Alpine:v3.5(2)
PackageVulnerable rangeFix by version rangeDependents
perl—
  • every version up to 5.24.3-r1: fixed in 5.24.3-r1
—
zlib—
  • 1.2.3.4 up to 1.2.11-r0: fixed in 1.2.11-r0
—
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
rsync—
  • every version up to 3.1.3-6: fixed in 3.1.3-6
—
zlib—
  • every version up to 1:1.2.8.dfsg-3: fixed in 1:1.2.8.dfsg-3
—
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
rsync—
  • every version up to 3.1.3-6: fixed in 3.1.3-6
—
zlib—
  • every version up to 1:1.2.8.dfsg-3: fixed in 1:1.2.8.dfsg-3
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
rsync—
  • every version up to 3.1.3-6: fixed in 3.1.3-6
—
zlib—
  • every version up to 1:1.2.8.dfsg-3: fixed in 1:1.2.8.dfsg-3
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
rsync—
  • every version up to 3.1.3-6: fixed in 3.1.3-6
—
zlib—
  • every version up to 1:1.2.8.dfsg-3: fixed in 1:1.2.8.dfsg-3
—
Debian:8(2)
PackageVulnerable rangeFix by version rangeDependents
rsync3.1.1-3, 3.1.1-3+deb8u1
  • every version up to 3.1.1-3+deb8u2: fixed in 3.1.1-3+deb8u2
—
zlib1:1.2.8.dfsg-2
  • every version up to 1:1.2.8.dfsg-2+deb8u1: fixed in 1:1.2.8.dfsg-2+deb8u1
—
Alpine:v3.3(1)
PackageVulnerable rangeFix by version rangeDependents
zlib—
  • 1.2.3.4 up to 1.2.11-r0: fixed in 1.2.11-r0
—
Alpine:v3.4(1)
PackageVulnerable rangeFix by version rangeDependents
zlib—
  • 1.2.3.4 up to 1.2.11-r0: fixed in 1.2.11-r0
—
Alpine:v3.6(1)
PackageVulnerable rangeFix by version rangeDependents
perl—
  • every version up to 5.24.3-r1: fixed in 5.24.3-r1
—

Weakness Classification(1)

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

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 5× in last 7d / 23× 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 153 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)· as of October 4, 2026

Frequently asked(5)

What is CVE-2016-9842?
CVE-2016-9842 is a high vulnerability published on May 23, 2017. The inflateMark function in inflate.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving left shifts of negative integers.
When was CVE-2016-9842 disclosed?
CVE-2016-9842 was first published on May 23, 2017, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-9842 actively exploited?
CVE-2016-9842 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.2% probability of exploitation in the next 30 days (92nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-9842?
CVE-2016-9842 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2016-9842?
A fix for CVE-2016-9842 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2016-9842 are linked in the Vendor Advisories panel on this page.

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