CVE-2022-48821

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2024-07-16. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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:

misc: fastrpc: avoid double fput() on failed usercopy

If the copy back to userland fails for the FASTRPC_IOCTL_ALLOC_DMA_BUFF ioctl(), we shouldn't assume that 'buf->dmabuf' is still valid. In fact, dma_buf_fd() called fd_install() before, i.e. "consumed" one reference, leaving us with none.

Calling dma_buf_put() will therefore put a reference we no longer own, leading to a valid file descritor table entry for an already released 'file' object which is a straight use-after-free.

Simply avoid calling dma_buf_put() and rely on the process exit code to do the necessary cleanup, if needed, i.e. if the file descriptor is still valid.

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

July 16, 2024

Last Modified

August 5, 2026

Advisory Details (5)

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

misc: fastrpc: avoid double fput() on failed usercopy - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e4382d0a39f9a1e260d62fdc079ddae5293c037d
generic

misc: fastrpc: avoid double fput() on failed usercopy - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5
generic

misc: fastrpc: avoid double fput() on failed usercopy - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc
generic

misc: fastrpc: avoid double fput() on failed usercopy - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215
generic

misc: fastrpc: avoid double fput() on failed usercopy - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/46963e2e0629cb31c96b1d47ddd89dc3d8990b34

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 5.4.180—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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1~bpo10+1 ... 5.10.92-2 (9 versions)5.10.103-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—5.16.10-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—5.16.10-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—5.16.10-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 22× 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 164 total refreshes for this CVE.

  1. 2026-09-20 20:13 UTCEPSS rescore
  2. 2026-09-16 14:05 UTCEPSS rescore
  3. 2026-09-16 05:11 UTCEPSS rescore
  4. 2026-09-15 03:07 UTCEPSS rescore
  5. 2026-09-13 16:44 UTCEPSS rescore
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  8. 2026-09-08 21:57 UTCEPSS rescore
  9. 2026-09-07 15:59 UTCEPSS rescore
  10. 2026-09-07 04:48 UTCOSV refresh
  11. 2026-09-06 13:45 UTCEPSS rescore
  12. 2026-09-05 15:25 UTCEPSS rescore
  13. 2026-09-04 13:57 UTCEPSS rescore
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  15. 2026-09-02 14:09 UTCEPSS rescore
  16. 2026-09-01 13:51 UTCEPSS rescore
  17. 2026-08-30 19:15 UTCEPSS rescore
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  19. 2026-08-28 21:38 UTCEPSS rescore
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  24. 2026-08-21 23:46 UTCEPSS rescore
  25. 2026-08-20 22:53 UTCEPSS rescore
Show 75 more
  1. 2026-08-20 14:31 UTCOSV refresh
  2. 2026-08-19 17:01 UTCEPSS rescore
  3. 2026-08-18 13:45 UTCEPSS rescore
  4. 2026-08-17 13:44 UTCEPSS rescore
  5. 2026-08-16 14:53 UTCEPSS rescore
  6. 2026-08-16 02:12 UTCEPSS rescore
  7. 2026-08-15 01:27 UTCEPSS rescore
  8. 2026-08-13 21:58 UTCEPSS rescore
  9. 2026-08-12 13:48 UTCEPSS rescore
  10. 2026-08-09 13:44 UTCEPSS rescore
  11. 2026-08-09 13:44 UTCEPSS rescore
  12. 2026-08-08 16:34 UTCEPSS rescore
  13. 2026-08-07 16:24 UTCEPSS rescore
  14. 2026-08-06 13:44 UTCEPSS rescore
  15. 2026-08-05 19:15 UTCEPSS rescore
  16. 2026-08-05 09:38 UTCEG score recompute
  17. 2026-08-05 09:38 UTCGHSA enrichment
  18. 2026-08-04 15:07 UTCEPSS rescore
  19. 2026-08-04 12:00 UTCEG score recompute
  20. 2026-08-04 12:00 UTCGHSA enrichment
  21. 2026-08-04 10:35 UTCEPSS rescore
  22. 2026-08-04 09:49 UTCEG score recompute
  23. 2026-08-04 09:49 UTCGHSA enrichment
  24. 2026-08-03 10:33 UTCEPSS rescore
  25. 2026-08-02 02:24 UTCEPSS rescore
  26. 2026-08-01 04:13 UTCEPSS rescore
  27. 2026-08-01 04:13 UTCEPSS rescore
  28. 2026-07-31 18:42 UTCOSV refresh
  29. 2026-07-30 16:25 UTCEPSS rescore
  30. 2026-07-30 01:28 UTCEPSS rescore
  31. 2026-07-28 15:34 UTCEPSS rescore
  32. 2026-07-26 14:52 UTCEPSS rescore
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  35. 2026-07-24 14:15 UTCEPSS rescore
  36. 2026-07-23 14:16 UTCEPSS rescore
  37. 2026-07-23 14:16 UTCEPSS rescore
  38. 2026-07-23 02:16 UTCEG score recompute
  39. 2026-07-22 23:03 UTCEG score recompute
  40. 2026-07-22 14:06 UTCEPSS rescore
  41. 2026-07-22 14:06 UTCEPSS rescore
  42. 2026-07-21 15:23 UTCEPSS rescore
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  44. 2026-07-20 17:05 UTCEPSS rescore
  45. 2026-07-19 14:29 UTCEPSS rescore
  46. 2026-07-19 14:29 UTCEPSS rescore
  47. 2026-07-19 02:27 UTCEPSS rescore
  48. 2026-07-19 02:27 UTCEPSS rescore
  49. 2026-07-18 10:03 UTCEPSS rescore
  50. 2026-07-18 10:03 UTCEPSS rescore
  51. 2026-07-16 17:00 UTCEPSS rescore
  52. 2026-07-15 16:56 UTCEPSS rescore
  53. 2026-07-15 16:56 UTCEPSS rescore
  54. 2026-07-15 01:58 UTCEPSS rescore
  55. 2026-07-15 01:58 UTCEPSS rescore
  56. 2026-07-14 01:40 UTCOSV refresh
  57. 2026-07-13 22:28 UTCEPSS rescore
  58. 2026-07-13 22:28 UTCEPSS rescore
  59. 2026-07-13 06:11 UTCEPSS rescore
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  61. 2026-07-12 05:44 UTCEPSS rescore
  62. 2026-07-11 08:25 UTCEPSS rescore
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  64. 2026-07-09 19:08 UTCEPSS rescore
  65. 2026-07-07 13:44 UTCEPSS rescore
  66. 2026-07-06 16:25 UTCEPSS rescore
  67. 2026-07-06 02:21 UTCEPSS rescore
  68. 2026-07-05 02:28 UTCEPSS rescore
  69. 2026-07-04 06:29 UTCEPSS rescore
  70. 2026-07-01 15:04 UTCEPSS rescore
  71. 2026-06-30 23:21 UTCEPSS rescore
  72. 2026-06-30 23:20 UTCEPSS rescore
  73. 2026-06-29 14:04 UTCEPSS rescore
  74. 2026-06-28 14:06 UTCEPSS rescore
  75. 2026-06-28 04:54 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2022-48821?
CVE-2022-48821 is a high vulnerability published on July 16, 2024. In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: avoid double fput() on failed usercopy If the copy back to userland fails for the FASTRPCIOCTLALLOCDMABUFF ioctl(), we shouldn't assume that 'buf->dmabuf' is still valid. In fact, dmabuffd() called fd_install()…
When was CVE-2022-48821 disclosed?
CVE-2022-48821 was first published in the National Vulnerability Database on July 16, 2024, 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-2022-48821 actively exploited?
CVE-2022-48821 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 80.0% of all scored CVEs.
What is the CVSS score of CVE-2022-48821?
CVE-2022-48821 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2022-48821?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-48821, 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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