CVE-2022-49803

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2025-05-01. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 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:

netdevsim: Fix memory leak of nsim_dev->fa_cookie

kmemleak reports this issue:

unreferenced object 0xffff8881bac872d0 (size 8): comm "sh", pid 58603, jiffies 4481524462 (age 68.065s) hex dump (first 8 bytes): 04 00 00 00 de ad be ef ........ backtrace: [<00000000c80b8577>] __kmalloc+0x49/0x150 [<000000005292b8c6>] nsim_dev_trap_fa_cookie_write+0xc1/0x210 [netdevsim] [<0000000093d78e77>] full_proxy_write+0xf3/0x180 [<000000005a662c16>] vfs_write+0x1c5/0xaf0 [<000000007aabf84a>] ksys_write+0xed/0x1c0 [<000000005f1d2e47>] do_syscall_64+0x3b/0x90 [<000000006001c6ec>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

The issue occurs in the following scenarios:

nsim_dev_trap_fa_cookie_write() kmalloc() fa_cookie nsim_dev->fa_cookie = fa_cookie .. nsim_drv_remove()

The fa_cookie allocked in nsim_dev_trap_fa_cookie_write() is not freed. To fix, add kfree(nsim_dev->fa_cookie) to nsim_drv_remove().

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
7.3%
KEV
Not listed

Published

May 1, 2025

Last Modified

July 4, 2026

Advisory Details (4)

Auto-updated Jul 4, 2026
No patch confirmed yet.
generic

netdevsim: Fix memory leak of nsim_dev->fa_cookie - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7d79725a7073d86b9185f87718e22f3d65115801
generic

netdevsim: Fix memory leak of nsim_dev->fa_cookie - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6d463ddd0107d4188229d996dcdd45c99bad8af7
generic

netdevsim: Fix memory leak of nsim_dev->fa_cookie - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/207edad5717e0a5709ce8467f0eff41c607835c9
generic

netdevsim: Fix memory leak of nsim_dev->fa_cookie - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/064bc7312bd09a48798418663090be0c776183db

Vendor Advisories for CVE-2022-49803(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 5.10.260—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 17× in last 7d / 50× 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.

  1. 2026-07-24 14:15 UTCEPSS rescore
  2. 2026-07-24 07:41 UTCOSV refresh
  3. 2026-07-23 14:16 UTCEPSS rescore
  4. 2026-07-23 14:16 UTCEPSS rescore
  5. 2026-07-23 02:16 UTCEG score recompute
  6. 2026-07-22 23:04 UTCEG score recompute
  7. 2026-07-22 14:06 UTCEPSS rescore
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  1. 2026-07-13 06:11 UTCEPSS rescore
  2. 2026-07-12 05:44 UTCEPSS rescore
  3. 2026-07-11 08:25 UTCEPSS rescore
  4. 2026-07-11 08:25 UTCEPSS rescore
  5. 2026-07-09 19:08 UTCEPSS rescore
  6. 2026-07-08 15:13 UTCEPSS rescore
  7. 2026-07-07 13:44 UTCEPSS rescore
  8. 2026-07-07 03:21 UTCOSV refresh
  9. 2026-07-06 16:25 UTCEPSS rescore
  10. 2026-07-06 02:21 UTCEPSS rescore
  11. 2026-07-05 02:28 UTCEPSS rescore
  12. 2026-07-04 12:27 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  13. 2026-07-04 12:16 UTCMITRE cvelistV5
  14. 2026-07-04 06:29 UTCEPSS rescore
  15. 2026-07-01 15:04 UTCEPSS rescore
  16. 2026-06-30 23:21 UTCEPSS rescore
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  24. 2026-06-25 13:48 UTCEPSS rescore
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  26. 2026-06-24 14:03 UTCEPSS rescore
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  39. 2026-06-18 14:13 UTCOSV refresh
  40. 2026-06-17 17:51 UTCEPSS rescore
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  42. 2026-06-16 17:51 UTCEPSS rescore
  43. 2026-06-16 17:51 UTCEPSS rescore
  44. 2026-06-15 17:47 UTCEPSS rescore
  45. 2026-06-14 23:16 UTCEPSS rescore
  46. 2026-06-13 22:59 UTCEPSS rescore
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  49. 2026-06-11 13:58 UTCEPSS rescore
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  53. 2026-06-08 14:15 UTCEPSS rescore
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  72. 2026-05-30 06:30 UTCEG score recompute
  73. 2026-05-30 06:30 UTCGHSA enrichment
  74. 2026-05-29 21:20 UTCOSV refresh
  75. 2026-05-29 13:43 UTCEPSS rescore

Frequently asked(5)

What is CVE-2022-49803?
CVE-2022-49803 is a medium vulnerability published on May 1, 2025. In the Linux kernel, the following vulnerability has been resolved: netdevsim: Fix memory leak of nsimdev->facookie kmemleak reports this issue: unreferenced object 0xffff8881bac872d0 (size 8): comm "sh", pid 58603, jiffies 4481524462 (age 68.065s) hex dump (first 8 bytes): 04 00 00 00 de ad be ef…
When was CVE-2022-49803 disclosed?
CVE-2022-49803 was first published in the National Vulnerability Database on May 1, 2025, with the most recent update on July 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-49803 actively exploited?
CVE-2022-49803 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-49803?
CVE-2022-49803 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2022-49803?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-49803, 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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