CVE-2022-49921

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-05-01. 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:

net: sched: Fix use after free in red_enqueue()

We can't use "skb" again after passing it to qdisc_enqueue(). This is basically identical to commit 2f09707d0c97 ("sch_sfb: Also store skb len before calling child enqueue").

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
7%
KEV
Not listed

Published

May 1, 2025

Last Modified

August 5, 2026

Advisory Details (8)

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

net: sched: Fix use after free in red_enqueue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8bdc2acd420c6f3dd1f1c78750ec989f02a1e2b9
generic

net: sched: Fix use after free in red_enqueue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/170e5317042c302777ed6d59fdb84af9b0219d4e
generic

net: sched: Fix use after free in red_enqueue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fc4b50adb400ee5ec527a04073174e8e73a139fa
generic

net: sched: Fix use after free in red_enqueue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5960b9081baca85cc7dcb14aec1de85999ea9d36
generic

net: sched: Fix use after free in red_enqueue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/52e0429471976785c155bfbf51d80990c6cd46e2
generic

net: sched: Fix use after free in red_enqueue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e877f8fa49fbccc63cb2df2e9179bddc695b825a
generic

net: sched: Fix use after free in red_enqueue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a238cdcf2bdc72207c74375fc8be13ee549ca9db
generic

net: sched: Fix use after free in red_enqueue() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/795afe0b9bb6c915f0299a8e309936519be01619

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 4.9.333—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 ... 5.10.92-2 (22 versions)5.10.158-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—6.0.8-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—6.0.8-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—6.0.8-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 21× 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 152 total refreshes for this CVE.

  1. 2026-09-24 14:00 UTCEPSS rescore
  2. 2026-09-23 13:45 UTCEPSS rescore
  3. 2026-09-20 20:13 UTCEPSS rescore
  4. 2026-09-16 14:05 UTCEPSS rescore
  5. 2026-09-16 05:11 UTCEPSS rescore
  6. 2026-09-15 03:07 UTCEPSS rescore
  7. 2026-09-13 16:44 UTCEPSS rescore
  8. 2026-09-11 14:50 UTCEPSS rescore
  9. 2026-09-11 09:34 UTCEPSS rescore
  10. 2026-09-07 15:59 UTCEPSS rescore
  11. 2026-09-07 04:18 UTCOSV refresh
  12. 2026-09-06 13:45 UTCEPSS rescore
  13. 2026-09-05 15:25 UTCEPSS rescore
  14. 2026-09-04 13:57 UTCEPSS rescore
  15. 2026-09-04 05:04 UTCEPSS rescore
  16. 2026-09-02 14:09 UTCEPSS rescore
  17. 2026-09-01 13:51 UTCEPSS rescore
  18. 2026-08-30 19:15 UTCEPSS rescore
  19. 2026-08-30 01:19 UTCEPSS rescore
  20. 2026-08-28 21:38 UTCEPSS rescore
  21. 2026-08-27 14:22 UTCEPSS rescore
  22. 2026-08-26 14:43 UTCEPSS rescore
  23. 2026-08-25 13:46 UTCEPSS rescore
  24. 2026-08-23 00:17 UTCEPSS rescore
  25. 2026-08-21 23:46 UTCEPSS rescore
Show 75 more
  1. 2026-08-20 14:01 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 09:27 UTCEG score recompute
  17. 2026-08-05 09:26 UTCGHSA enrichment
  18. 2026-08-04 15:07 UTCEPSS rescore
  19. 2026-08-04 10:35 UTCEPSS rescore
  20. 2026-08-04 09:44 UTCEG score recompute
  21. 2026-08-04 09:44 UTCGHSA enrichment
  22. 2026-08-03 10:33 UTCEPSS rescore
  23. 2026-08-02 02:24 UTCEPSS rescore
  24. 2026-08-01 04:13 UTCEPSS rescore
  25. 2026-08-01 04:13 UTCEPSS rescore
  26. 2026-07-30 16:25 UTCEPSS rescore
  27. 2026-07-30 01:28 UTCEPSS rescore
  28. 2026-07-28 15:34 UTCEPSS rescore
  29. 2026-07-26 14:52 UTCEPSS rescore
  30. 2026-07-26 14:52 UTCEPSS rescore
  31. 2026-07-24 14:15 UTCEPSS rescore
  32. 2026-07-24 07:41 UTCOSV refresh
  33. 2026-07-23 14:16 UTCEPSS rescore
  34. 2026-07-23 14:16 UTCEPSS rescore
  35. 2026-07-23 02:16 UTCEG score recompute
  36. 2026-07-22 23:04 UTCEG score recompute
  37. 2026-07-22 14:06 UTCEPSS rescore
  38. 2026-07-22 14:06 UTCEPSS rescore
  39. 2026-07-21 15:23 UTCEPSS rescore
  40. 2026-07-21 15:23 UTCEPSS rescore
  41. 2026-07-20 17:05 UTCEPSS rescore
  42. 2026-07-19 14:29 UTCEPSS rescore
  43. 2026-07-19 14:29 UTCEPSS rescore
  44. 2026-07-19 02:27 UTCEPSS rescore
  45. 2026-07-19 02:27 UTCEPSS rescore
  46. 2026-07-18 10:03 UTCEPSS rescore
  47. 2026-07-18 10:03 UTCEPSS rescore
  48. 2026-07-16 17:00 UTCEPSS rescore
  49. 2026-07-15 16:56 UTCEPSS rescore
  50. 2026-07-15 16:56 UTCEPSS rescore
  51. 2026-07-15 01:58 UTCEPSS rescore
  52. 2026-07-15 01:58 UTCEPSS rescore
  53. 2026-07-13 22:28 UTCEPSS rescore
  54. 2026-07-13 22:28 UTCEPSS rescore
  55. 2026-07-13 06:11 UTCEPSS rescore
  56. 2026-07-13 06:11 UTCEPSS rescore
  57. 2026-07-12 05:44 UTCEPSS rescore
  58. 2026-07-11 08:25 UTCEPSS rescore
  59. 2026-07-11 08:25 UTCEPSS rescore
  60. 2026-07-09 19:08 UTCEPSS rescore
  61. 2026-07-08 15:13 UTCEPSS rescore
  62. 2026-07-07 13:44 UTCEPSS rescore
  63. 2026-07-07 02:51 UTCOSV refresh
  64. 2026-07-06 16:25 UTCEPSS rescore
  65. 2026-07-06 02:21 UTCEPSS rescore
  66. 2026-07-04 06:29 UTCEPSS rescore
  67. 2026-07-01 15:04 UTCEPSS rescore
  68. 2026-06-30 23:21 UTCEPSS rescore
  69. 2026-06-30 23:20 UTCEPSS rescore
  70. 2026-06-29 14:04 UTCEPSS rescore
  71. 2026-06-28 14:06 UTCEPSS rescore
  72. 2026-06-28 04:54 UTCEPSS rescore
  73. 2026-06-28 04:54 UTCEPSS rescore
  74. 2026-06-27 03:07 UTCEPSS rescore
  75. 2026-06-27 03:07 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2022-49921?
CVE-2022-49921 is a high vulnerability published on May 1, 2025. In the Linux kernel, the following vulnerability has been resolved: net: sched: Fix use after free in red_enqueue() We can't use "skb" again after passing it to qdisc_enqueue(). This is basically identical to commit 2f09707d0c97 ("sch_sfb: Also store skb len before calling child enqueue").
When was CVE-2022-49921 disclosed?
CVE-2022-49921 was first published in the National Vulnerability Database on May 1, 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-2022-49921 actively exploited?
CVE-2022-49921 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 92.8% of all scored CVEs.
What is the CVSS score of CVE-2022-49921?
CVE-2022-49921 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2022-49921?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-49921, 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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