CVE-2022-49076

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 — 3 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

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

RDMA/hfi1: Fix use-after-free bug for mm struct

Under certain conditions, such as MPI_Abort, the hfi1 cleanup code may represent the last reference held on the task mm. hfi1_mmu_rb_unregister() then drops the last reference and the mm is freed before the final use in hfi1_release_user_pages(). A new task may allocate the mm structure while it is still being used, resulting in problems. One manifestation is corruption of the mmap_sem counter leading to a hang in down_write(). Another is corruption of an mm struct that is in use by another task.

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
17%
KEV
Not listed

Published

February 26, 2025

Last Modified

August 5, 2026

Advisory Details (5)

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

RDMA/hfi1: Fix use-after-free bug for mm struct - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2bbac98d0930e8161b1957dc0ec99de39ade1b3c
generic

RDMA/hfi1: Fix use-after-free bug for mm struct - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5a9a1b24ddb510715f8f621263938186579a965c
generic

RDMA/hfi1: Fix use-after-free bug for mm struct - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0b7186d657ee55e2cdefae498f07d5c1961e8023
generic

RDMA/hfi1: Fix use-after-free bug for mm struct - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9ca11bd8222a612de0d2f54d050bfcf61ae2883f
generic

RDMA/hfi1: Fix use-after-free bug for mm struct - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5f54364ff6cfcd14cddf5441c4a490bb28dd69f7

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 5.10.111—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 11× in last 7d / 47× 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 115 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 UTCGHSA enrichment
  6. 2026-08-04 15:07 UTCEPSS rescore
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  8. 2026-08-04 09:47 UTCEG score recompute
  9. 2026-08-04 09:47 UTCGHSA enrichment
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  24. 2026-07-23 02:16 UTCEG score recompute
  25. 2026-07-22 23:03 UTCEG score recompute
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  1. 2026-07-22 14:06 UTCEPSS rescore
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  25. 2026-07-07 10:21 UTCOSV refresh
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  52. 2026-06-18 21:13 UTCOSV refresh
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Frequently asked(5)

What is CVE-2022-49076?
CVE-2022-49076 is a high vulnerability published on February 26, 2025. In the Linux kernel, the following vulnerability has been resolved: RDMA/hfi1: Fix use-after-free bug for mm struct Under certain conditions, such as MPI_Abort, the hfi1 cleanup code may represent the last reference held on the task mm. hfi1mmurb_unregister() then drops the last reference and the…
When was CVE-2022-49076 disclosed?
CVE-2022-49076 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-2022-49076 actively exploited?
CVE-2022-49076 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 83.1% of all scored CVEs.
What is the CVSS score of CVE-2022-49076?
CVE-2022-49076 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2022-49076?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-49076, 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.

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