CVE-2022-49070

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

Score 5.5 from GitHub Security Advisory published 2025-03-18. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2022-55134 (ENISA EUVD) · GHSA-758p-v7g2-6f96 (GitHub Security Advisories)Source: ENISA EUVD

5.5EG
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: 0.3%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

fbdev: Fix unregistering of framebuffers without device

OF framebuffers do not have an underlying device in the Linux device hierarchy. Do a regular unregister call instead of hot unplugging such a non-existing device. Fixes a NULL dereference. An example error message on ppc64le is shown below.

BUG: Kernel NULL pointer dereference on read at 0x00000060 Faulting instruction address: 0xc00000000080dfa4 Oops: Kernel access of bad area, sig: 11 [#1] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries [...] CPU: 2 PID: 139 Comm: systemd-udevd Not tainted 5.17.0-ae085d7f9365 #1 NIP: c00000000080dfa4 LR: c00000000080df9c CTR: c000000000797430 REGS: c000000004132fe0 TRAP: 0300 Not tainted (5.17.0-ae085d7f9365) MSR: 8000000002009033 CR: 28228282 XER: 20000000 CFAR: c00000000000c80c DAR: 0000000000000060 DSISR: 40000000 IRQMASK: 0 GPR00: c00000000080df9c c000000004133280 c00000000169d200 0000000000000029 GPR04: 00000000ffffefff c000000004132f90 c000000004132f88 0000000000000000 GPR08: c0000000015658f8 c0000000015cd200 c0000000014f57d0 0000000048228283 GPR12: 0000000000000000 c00000003fffe300 0000000020000000 0000000000000000 GPR16: 0000000000000000 0000000113fc4a40 0000000000000005 0000000113fcfb80 GPR20: 000001000f7283b0 0000000000000000 c000000000e4a588 c000000000e4a5b0 GPR24: 0000000000000001 00000000000a0000 c008000000db0168 c0000000021f6ec0 GPR28: c0000000016d65a8 c000000004b36460 0000000000000000 c0000000016d64b0 NIP [c00000000080dfa4] do_remove_conflicting_framebuffers+0x184/0x1d0 [c000000004133280] [c00000000080df9c] do_remove_conflicting_framebuffers+0x17c/0x1d0 (unreliable) [c000000004133350] [c00000000080e4d0] remove_conflicting_framebuffers+0x60/0x150 [c0000000041333a0] [c00000000080e6f4] remove_conflicting_pci_framebuffers+0x134/0x1b0 [c000000004133450] [c008000000e70438] drm_aperture_remove_conflicting_pci_framebuffers+0x90/0x100 [drm] [c000000004133490] [c008000000da0ce4] bochs_pci_probe+0x6c/0xa64 [bochs] [...] [c000000004133db0] [c00000000002aaa0] system_call_exception+0x170/0x2d0 [c000000004133e10] [c00000000000c3cc] system_call_common+0xec/0x250

The bug [1] was introduced by commit 27599aacbaef ("fbdev: Hot-unplug firmware fb devices on forced removal"). Most firmware framebuffers have an underlying platform device, which can be hot-unplugged before loading the native graphics driver. OF framebuffers do not (yet) have that device. Fix the code by unregistering the framebuffer as before without a hot unplug.

Tested with 5.17 on qemu ppc64le emulation.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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
0.3%
EPSS %ILE
17th
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 (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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

February 26, 2025

Last Modified

October 1, 2025

References (4)

Vendor Advisories for CVE-2022-49070(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 / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:5.14.0-284.11.1.el9_22023-05-09redhat
linuxKernel @ 5.15.34 (fixes >=5.15.33)—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.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.17.3-1: fixed in 5.17.3-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.17.3-1: fixed in 5.17.3-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 5.17.3-1: fixed in 5.17.3-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 37× 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 97 of 188 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 91 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:39 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  2. 2026-11-01 16:30 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  3. 2026-10-31 16:29 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  4. 2026-10-30 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  5. 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  6. 2026-10-28 16:28 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  7. 2026-10-27 16:28 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  8. 2026-10-26 16:28 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  9. 2026-10-25 17:55 UTCEG score recompute
  10. 2026-10-25 16:29 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  11. 2026-10-24 17:58 UTCEG score recompute
  12. 2026-10-24 17:58 UTCVendor advisory
  13. 2026-10-24 17:58 UTCGHSA enrichmentGHSA-758p-v7g2-6f96 · GitHub CVSS 5.5
  14. 2026-10-24 16:29 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  15. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  16. 2026-10-22 16:30 UTCEPSS rescoreEPSS 0.3% · 16th percentile
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  19. 2026-10-19 16:28 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  20. 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  21. 2026-10-18 08:20 UTCEG score recompute
  22. 2026-10-17 16:29 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  23. 2026-10-16 16:35 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  24. 2026-10-15 16:28 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  25. 2026-10-14 16:29 UTCEPSS rescoreEPSS 0.3% · 16th percentile
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  1. 2026-10-13 16:29 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  2. 2026-10-12 18:42 UTCEG score recompute
  3. 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  4. 2026-10-11 22:05 UTCEG score recompute
  5. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  6. 2026-10-10 19:57 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  7. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  8. 2026-10-08 17:05 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  9. 2026-10-07 23:45 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  10. 2026-10-06 15:14 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  11. 2026-10-05 17:40 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  12. 2026-10-04 23:19 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  13. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  14. 2026-10-02 22:55 UTCOSV refresh
  15. 2026-09-30 16:12 UTCEG score recompute
  16. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  17. 2026-09-27 13:42 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  18. 2026-09-26 15:55 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  19. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  20. 2026-09-24 14:00 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  21. 2026-09-23 13:45 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  22. 2026-09-20 20:13 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  23. 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  24. 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  25. 2026-09-15 03:07 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  26. 2026-09-13 20:24 UTCOSV refresh
  27. 2026-09-13 16:44 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  28. 2026-09-11 14:50 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  29. 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  30. 2026-09-08 21:57 UTCEPSS rescoreEPSS 0.3% · 17th percentile
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  36. 2026-09-02 14:09 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  37. 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  38. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  39. 2026-08-30 01:19 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  40. 2026-08-28 21:38 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  41. 2026-08-27 14:22 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  42. 2026-08-26 14:43 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  43. 2026-08-25 21:40 UTCOSV refresh
  44. 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  45. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  46. 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  47. 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.3% · 17th percentile
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  50. 2026-08-17 13:44 UTCEPSS rescoreEPSS 0.3% · 17th percentile
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  54. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  55. 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  56. 2026-08-09 14:10 UTCOSV refresh
  57. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  58. 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
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  60. 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.3% · 17th percentile
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  67. 2026-07-30 16:25 UTCEPSS rescoreEPSS 0.3% · 17th percentile
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  69. 2026-07-28 15:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
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  71. 2026-07-25 14:16 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  72. 2026-07-24 14:41 UTCOSV refresh

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2022-49070?
CVE-2022-49070 is a medium-severity vulnerability; its CVE record was published on February 26, 2025. In the Linux kernel, the following vulnerability has been resolved: fbdev: Fix unregistering of framebuffers without device OF framebuffers do not have an underlying device in the Linux device hierarchy. Do a regular unregister call instead of hot unplugging such a non-existing device. Fixes a NULL…
When was the CVE record for CVE-2022-49070 published?
The CVE record for CVE-2022-49070 was published on February 26, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 1, 2025; the record at its source may have been updated since.
Is CVE-2022-49070 actively exploited?
CVE-2022-49070 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (17th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-49070?
CVE-2022-49070 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2022-49070?
A fix for CVE-2022-49070 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2022-49070 are linked in the Vendor Advisories panel on this page.

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