CVE-2022-2787

MEDIUMNVD 4.34.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 4.3 from GitHub Security Advisory published 2022-08-28. NVD baseline CVSS 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
4.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1.0%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Schroot before 1.6.13 had too permissive rules on chroot or session names, allowing a denial of service on the schroot service for all users that may start a schroot session.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
20
EG Risk 20/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity43% × 45%
Impact severity (EG Severity): CVSS 4.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation1.0% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
1.0%
EPSS %ILE
63rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (4.3): severity, escalated by confirmed exploitation. This CVE's 4.3 is its impact severity (EG Severity), not escalated.

EG Severity
4.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
1.0% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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 (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 27, 2022

Last Modified

November 21, 2024

References (4)

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuschroot-common (1.6.10-1ubuntu3+esm1) @ xenial2026-05-25ubuntu

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

(5 across 5 ecosystems)
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
schroot1.6.10-6
  • every version up to 1.6.10-6+deb10u1: fixed in 1.6.10-6+deb10u1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
schroot1.6.10-12
  • every version up to 1.6.10-12+deb11u1: fixed in 1.6.10-12+deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
schroot—
  • every version up to 1.6.12-2: fixed in 1.6.12-2
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
schroot—
  • every version up to 1.6.12-2: fixed in 1.6.12-2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
schroot—
  • every version up to 1.6.12-2: fixed in 1.6.12-2
—

Weakness Classification(1)

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

All Vendor Advisories

(1)

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 8× in last 7d / 35× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 96 of 205 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 100 are merged into the row they repeat. The 109 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-23 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  2. 2026-10-22 16:30 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  3. 2026-10-21 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  4. 2026-10-20 16:29 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  5. 2026-10-19 16:28 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  6. 2026-10-18 16:28 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  7. 2026-10-18 08:38 UTCEG score recompute
  8. 2026-10-17 16:29 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  9. 2026-10-16 16:34 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  10. 2026-10-15 21:25 UTCOSV refresh
  11. 2026-10-15 16:28 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  12. 2026-10-14 16:29 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  13. 2026-10-13 16:29 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  14. 2026-10-12 18:56 UTCEG score recompute
  15. 2026-10-12 16:30 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  16. 2026-10-11 23:22 UTCEG score recompute
  17. 2026-10-11 13:44 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  18. 2026-10-10 19:56 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  19. 2026-10-09 20:04 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  20. 2026-10-08 16:40 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  21. 2026-10-07 23:45 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  22. 2026-10-06 15:14 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  23. 2026-10-05 17:40 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  24. 2026-10-04 23:19 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  25. 2026-10-03 14:23 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
Show 71 more
  1. 2026-10-02 16:23 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  2. 2026-09-30 15:53 UTCEG score recompute
  3. 2026-09-30 15:00 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  4. 2026-09-29 15:16 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  5. 2026-09-28 13:48 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  6. 2026-09-27 13:42 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  7. 2026-09-26 15:54 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  8. 2026-09-26 00:22 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  9. 2026-09-24 14:00 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  10. 2026-09-24 12:55 UTCOSV refresh
  11. 2026-09-23 13:45 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  12. 2026-09-22 14:44 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  13. 2026-09-20 20:13 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  14. 2026-09-19 15:38 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  15. 2026-09-18 19:24 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  16. 2026-09-16 14:05 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  17. 2026-09-15 03:06 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  18. 2026-09-13 16:44 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  19. 2026-09-12 14:57 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  20. 2026-09-11 14:49 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  21. 2026-09-11 09:33 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  22. 2026-09-08 21:57 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  23. 2026-09-07 15:58 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  24. 2026-09-06 13:45 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  25. 2026-09-05 15:25 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  26. 2026-09-05 05:44 UTCOSV refresh
  27. 2026-09-04 13:57 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  28. 2026-09-04 05:04 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  29. 2026-09-02 14:09 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  30. 2026-09-01 13:51 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  31. 2026-08-30 19:14 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  32. 2026-08-30 01:19 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  33. 2026-08-28 21:38 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  34. 2026-08-27 14:22 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  35. 2026-08-26 14:43 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  36. 2026-08-25 13:46 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  37. 2026-08-24 14:13 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  38. 2026-08-23 00:16 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  39. 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  40. 2026-08-20 22:52 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  41. 2026-08-19 17:01 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  42. 2026-08-18 16:28 UTCOSV refresh
  43. 2026-08-18 13:45 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  44. 2026-08-17 13:44 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  45. 2026-08-16 14:53 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  46. 2026-08-16 02:11 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  47. 2026-08-15 01:27 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  48. 2026-08-13 21:57 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  49. 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  50. 2026-08-11 13:38 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  51. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  52. 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  53. 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  54. 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  55. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  56. 2026-08-04 15:07 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  57. 2026-08-04 10:35 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  58. 2026-08-03 11:57 UTCOSV refresh
  59. 2026-08-03 10:33 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  60. 2026-08-02 02:24 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  61. 2026-08-01 04:13 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  62. 2026-07-30 16:25 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  63. 2026-07-30 01:28 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  64. 2026-07-28 15:33 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  65. 2026-07-26 14:52 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  66. 2026-07-25 14:15 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  67. 2026-07-24 14:15 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  68. 2026-07-23 14:16 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  69. 2026-07-23 02:10 UTCEG score recompute
  70. 2026-07-22 22:57 UTCEG score recompute
  71. 2026-07-22 14:06 UTCEPSS rescoreEPSS 0.8% · 53rd percentile

Frequently asked(5)

What is CVE-2022-2787?
CVE-2022-2787 is a medium-severity vulnerability; its CVE record was published on August 27, 2022. Schroot before 1.6.13 had too permissive rules on chroot or session names, allowing a denial of service on the schroot service for all users that may start a schroot session.
When was CVE-2022-2787 made public?
CVE-2022-2787 was made public on August 18, 2022: that is the date its CVE record's CNA, Debian GNU/Linux, gives for when the vulnerability was made public. The CVE record itself was published on August 27, 2022. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
Is CVE-2022-2787 actively exploited?
CVE-2022-2787 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (63rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-2787?
CVE-2022-2787 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2022-2787?
A fix for CVE-2022-2787 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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