CVE-2022-49078

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-02-27. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

lz4: fix LZ4_decompress_safe_partial read out of bound

When partialDecoding, it is EOF if we've either filled the output buffer or can't proceed with reading an offset for following match.

In some extreme corner cases when compressed data is suitably corrupted, UAF will occur. As reported by KASAN [1], LZ4_decompress_safe_partial may lead to read out of bound problem during decoding. lz4 upstream has fixed it [2] and this issue has been disscussed here [3] before.

current decompression routine was ported from lz4 v1.8.3, bumping lib/lz4 to v1.9.+ is certainly a huge work to be done later, so, we'd better fix it first.

[1] https://lore.kernel.org/all/[email protected]/ [2] https://github.com/lz4/lz4/commit/c5d6f8a8be3927c0bec91bcc58667a6cfad244ad# [3] https://lore.kernel.org/all/[email protected]/

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

February 26, 2025

Last Modified

August 5, 2026

Advisory Details (6)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

lz4: fix LZ4_decompress_safe_partial read out of bound - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eafc0a02391b7b36617b36c97c4b5d6832cf5e24
generic

lz4: fix LZ4_decompress_safe_partial read out of bound - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/467d5e200ab4486b744fe1776154a43d1aa22d4b
generic

lz4: fix LZ4_decompress_safe_partial read out of bound - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e64dbe97c05c769525cbca099ddbd22485630235
generic

lz4: fix LZ4_decompress_safe_partial read out of bound - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9fb8bc6cfc58773ce95414e11c9ccc8fc6ac4927
generic

lz4: fix LZ4_decompress_safe_partial read out of bound - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6adc01a7aa37445dafe8846faa0610a86029b253
generic

lz4: fix LZ4_decompress_safe_partial read out of bound - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/73953dfa9d50e5c9fe98ee13fd1d3427aa12a0a3

Vendor Advisories for CVE-2022-49078(1)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkernel-0:5.14.0-503.11.1.el9_52024-11-12redhat
linuxKernel @ 5.4.189—osv

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 51× 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 118 total refreshes for this CVE.

  1. 2026-08-07 16:24 UTCEPSS rescore
  2. 2026-08-06 13:44 UTCEPSS rescore
  3. 2026-08-05 19:15 UTCEPSS rescore
  4. 2026-08-05 09:35 UTCEG score recompute
  5. 2026-08-05 09:35 UTCVendor advisory
  6. 2026-08-05 09:35 UTCGHSA enrichment
  7. 2026-08-04 15:07 UTCEPSS rescore
  8. 2026-08-04 10:35 UTCEPSS rescore
  9. 2026-08-04 09:47 UTCEG score recompute
  10. 2026-08-04 09:47 UTCVendor advisory
  11. 2026-08-04 09:47 UTCGHSA enrichment
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  22. 2026-07-24 14:41 UTCOSV refresh
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  24. 2026-07-23 14:16 UTCEPSS rescore
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  1. 2026-07-23 02:16 UTCEG score recompute
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  3. 2026-07-22 14:06 UTCEPSS rescore
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  5. 2026-07-21 15:23 UTCEPSS rescore
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  23. 2026-07-12 05:44 UTCEPSS rescore
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  26. 2026-07-09 19:08 UTCEPSS rescore
  27. 2026-07-08 15:13 UTCEPSS rescore
  28. 2026-07-07 13:44 UTCEPSS rescore
  29. 2026-07-07 10:21 UTCOSV refresh
  30. 2026-07-06 16:25 UTCEPSS rescore
  31. 2026-07-06 02:21 UTCEPSS rescore
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  50. 2026-06-21 14:55 UTCEPSS rescore
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  54. 2026-06-19 19:24 UTCEPSS rescore
  55. 2026-06-19 19:24 UTCEPSS rescore
  56. 2026-06-18 21:13 UTCOSV refresh
  57. 2026-06-18 17:51 UTCEPSS rescore
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  74. 2026-06-06 13:46 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2022-49078?
CVE-2022-49078 is a high vulnerability published on February 26, 2025. In the Linux kernel, the following vulnerability has been resolved: lz4: fix LZ4decompresssafe_partial read out of bound When partialDecoding, it is EOF if we've either filled the output buffer or can't proceed with reading an offset for following match. In some extreme corner cases when compressed…
When was CVE-2022-49078 disclosed?
CVE-2022-49078 was first published in the National Vulnerability Database on February 26, 2025, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-49078 actively exploited?
CVE-2022-49078 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 79.5% of all scored CVEs.
What is the CVSS score of CVE-2022-49078?
CVE-2022-49078 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2022-49078?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-49078, 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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