CVE-2026-46331

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-16. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

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

net/sched: fix pedit partial COW leading to page cache corruption

tcf_pedit_act() computes the COW range for skb_ensure_writable() once before the key loop using tcfp_off_max_hint, but the hint does not account for the runtime header offset added by typed keys. This can leave part of the write region un-COW'd.

Fix by moving skb_ensure_writable() inside the per-key loop where the actual write offset is known, and add overflow checking on the offset arithmetic. For negative offsets (e.g. Ethernet header edits at ingress), use skb_cow() to COW the headroom instead. Guard offset_valid() against INT_MIN, where negation is undefined.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
—
EPSS
24.4%
KEV
Not listed

Published

June 16, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

net/sched: fix pedit partial COW leading to page cache corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b198ed4e52580a7238c7c7082f03906f8b310313
generic

net/sched: fix pedit partial COW leading to page cache corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/899ee91156e57784090c5565e4f31bd7dbffbc5a
generic

net/sched: fix pedit partial COW leading to page cache corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3dee9d0c198faeb95d052c1b94c2958751a28512
generic

net/sched: fix pedit partial COW leading to page cache corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61b

Vendor Advisories for CVE-2026-46331(20)

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

Patch Availability(24)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhcos-412.86.202606251120-02026-07-09redhat
redhatrhcos-417.94.202606250942-02026-07-09redhat
redhatrhcos-415.92.202606200237-02026-07-06redhat
redhatrhcos-4.19.9.6.202606241344-02026-07-02redhat
redhatrhcos-418.94.202606221349-02026-07-01redhat
redhatrhcos-416.94.202606230218-02026-07-01redhat
redhatrhcos-414.92.202606231112-02026-07-01redhat
redhatkernel-0:6.12.0-231.13.el10nv2026-06-30redhat
redhatrhcos-4.20.9.6.202606241928-02026-06-30redhat
redhatrhcos-4.21.9.6.202606241859-02026-06-30redhat
redhatrhcos-4.22.9.8.202606230855-02026-06-30redhat
redhatkpatch-patch2026-06-29redhat
redhatkernel-0:4.18.0-372.197.1.el8_62026-06-22redhat
redhatkernel-rt-0:5.14.0-284.177.1.rt14.462.el9_22026-06-22redhat
redhatkernel-0:5.14.0-284.177.1.el9_22026-06-22redhat
redhatkernel-0:5.14.0-570.123.1.el9_62026-06-22redhat
redhatkernel-0:4.18.0-305.195.1.el8_42026-06-22redhat
redhatkernel-0:5.14.0-687.17.1.el9_82026-06-22redhat
redhatkernel-0:5.14.0-427.134.1.el9_42026-06-22redhat
redhatkernel-0:6.12.0-212.11.el10nv2026-06-22redhat
redhatkernel-0:6.12.0-55.82.1.el10_02026-06-22redhat
redhatkernel-0:6.12.0-211.26.1.el10_22026-06-20redhat
redhatkernel-0:4.18.0-477.148.1.el8_82026-06-19redhat
redhatkernel-0:4.18.0-553.136.1.el8_102026-06-19redhat

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(2)

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

Additional Vendor Advisories

(10)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 100× 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 117 total refreshes for this CVE.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:24 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
  5. 2026-07-19 02:29 UTCEPSS rescore
  6. 2026-07-18 10:04 UTCEPSS rescore
  7. 2026-07-16 22:44 UTCVendor advisory
  8. 2026-07-16 22:44 UTCGHSA enrichment
  9. 2026-07-16 17:03 UTCEPSS rescore
  10. 2026-07-16 03:18 UTCVendor advisory
  11. 2026-07-16 03:18 UTCGHSA enrichment
  12. 2026-07-15 16:57 UTCEPSS rescore
  13. 2026-07-15 15:35 UTCVendor advisory
  14. 2026-07-15 15:35 UTCGHSA enrichment
  15. 2026-07-15 02:00 UTCEPSS rescore
  16. 2026-07-15 01:21 UTCVendor advisory
  17. 2026-07-15 01:21 UTCGHSA enrichment
  18. 2026-07-14 11:45 UTCVendor advisory
  19. 2026-07-14 11:45 UTCGHSA enrichment
  20. 2026-07-13 22:51 UTCVendor advisory
  21. 2026-07-13 22:51 UTCGHSA enrichment
  22. 2026-07-13 22:30 UTCEPSS rescore
  23. 2026-07-13 11:08 UTCVendor advisory
  24. 2026-07-13 11:08 UTCGHSA enrichment
  25. 2026-07-13 06:13 UTCEPSS rescore
Show 75 more
  1. 2026-07-12 22:08 UTCVendor advisory
  2. 2026-07-12 22:08 UTCGHSA enrichment
  3. 2026-07-12 09:22 UTCVendor advisory
  4. 2026-07-12 09:22 UTCGHSA enrichment
  5. 2026-07-12 05:46 UTCEPSS rescore
  6. 2026-07-11 21:39 UTCVendor advisory
  7. 2026-07-11 21:39 UTCGHSA enrichment
  8. 2026-07-11 09:56 UTCVendor advisory
  9. 2026-07-11 09:56 UTCGHSA enrichment
  10. 2026-07-11 08:27 UTCEPSS rescore
  11. 2026-07-10 22:13 UTCVendor advisory
  12. 2026-07-10 22:13 UTCGHSA enrichment
  13. 2026-07-10 10:30 UTCVendor advisory
  14. 2026-07-10 10:30 UTCGHSA enrichment
  15. 2026-07-09 22:48 UTCVendor advisory
  16. 2026-07-09 22:48 UTCGHSA enrichment
  17. 2026-07-09 19:10 UTCEPSS rescore
  18. 2026-07-09 11:04 UTCVendor advisory
  19. 2026-07-09 11:04 UTCGHSA enrichment
  20. 2026-07-08 23:08 UTCVendor advisory
  21. 2026-07-08 23:07 UTCGHSA enrichment
  22. 2026-07-08 15:16 UTCEPSS rescore
  23. 2026-07-08 11:17 UTCVendor advisory
  24. 2026-07-08 11:16 UTCGHSA enrichment
  25. 2026-07-07 23:33 UTCVendor advisory
  26. 2026-07-07 23:33 UTCGHSA enrichment
  27. 2026-07-07 13:46 UTCEPSS rescore
  28. 2026-07-07 11:50 UTCVendor advisory
  29. 2026-07-07 11:50 UTCGHSA enrichment
  30. 2026-07-06 23:27 UTCVendor advisory
  31. 2026-07-06 23:27 UTCGHSA enrichment
  32. 2026-07-06 16:27 UTCEPSS rescore
  33. 2026-07-06 02:23 UTCEPSS rescore
  34. 2026-07-05 21:01 UTCVendor advisory
  35. 2026-07-05 21:01 UTCGHSA enrichment
  36. 2026-07-05 09:15 UTCVendor advisory
  37. 2026-07-05 09:15 UTCGHSA enrichment
  38. 2026-07-05 02:30 UTCEPSS rescore
  39. 2026-07-04 21:27 UTCVendor advisory
  40. 2026-07-04 21:27 UTCGHSA enrichment
  41. 2026-07-04 09:25 UTCVendor advisory
  42. 2026-07-04 09:25 UTCGHSA enrichment
  43. 2026-07-04 06:31 UTCEPSS rescore
  44. 2026-07-03 13:55 UTCVendor advisory
  45. 2026-07-03 13:55 UTCGHSA enrichment
  46. 2026-07-02 22:58 UTCVendor advisory
  47. 2026-07-02 22:58 UTCGHSA enrichment
  48. 2026-07-02 11:15 UTCVendor advisory
  49. 2026-07-02 11:15 UTCGHSA enrichment
  50. 2026-07-01 23:21 UTCVendor advisory
  51. 2026-07-01 23:21 UTCGHSA enrichment
  52. 2026-07-01 15:07 UTCEPSS rescore
  53. 2026-07-01 11:37 UTCVendor advisory
  54. 2026-07-01 11:37 UTCGHSA enrichment
  55. 2026-06-30 23:55 UTCVendor advisory
  56. 2026-06-30 23:55 UTCGHSA enrichment
  57. 2026-06-30 23:22 UTCEPSS rescore
  58. 2026-06-30 12:11 UTCEG score recompute▲ 7.80
  59. 2026-06-30 12:11 UTCVendor advisory
  60. 2026-06-30 12:11 UTCGHSA enrichment
  61. 2026-06-29 14:06 UTCEPSS rescore
  62. 2026-06-29 14:06 UTCEPSS rescore
  63. 2026-06-28 14:07 UTCEPSS rescore
  64. 2026-06-28 07:52 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  65. 2026-06-28 04:56 UTCEPSS rescore
  66. 2026-06-28 04:56 UTCEPSS rescore
  67. 2026-06-27 16:25 UTCVendor advisory
  68. 2026-06-27 16:24 UTCGHSA enrichment
  69. 2026-06-27 03:08 UTCEPSS rescore
  70. 2026-06-25 13:49 UTCEPSS rescore
  71. 2026-06-24 20:54 UTCVendor advisory
  72. 2026-06-24 20:53 UTCGHSA enrichment
  73. 2026-06-24 14:05 UTCEPSS rescore
  74. 2026-06-23 21:33 UTCEPSS rescore
  75. 2026-06-23 21:33 UTCEPSS rescore

Publicly available exploits

(5 references)

Working exploit code is in the public domain (5 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCyanxinwu946/CVE-2026-46331
    First seen Jul 11, 2026

    CVE-2026-46331 act_pedit page-cache corruption exploit, with Alpine PIE fix

    Open source ↗
  • GitHub PoCaexdyhaxor/CVE-2026-46331
    First seen Jul 10, 2026

    A Proof of Concept (PoC) exploit for CVE-2026-46331

    Open source ↗
  • GitHub PoCvulnquest58/dirtyclone-exploit
    First seen Jun 28, 2026

    CVE-2026-46331 — Linux Kernel Local Privilege Escalation TC pedit + IPsec TEE Page Cache Corruption · Affected kernels: ≤ 6.12.9

    Open source ↗
  • GitHub PoC0xBlackash/CVE-2026-46331
    First seen Jun 26, 2026

    CVE-2026-46331

    Open source ↗
  • GitHub PoCsgkdev/packet_edit_meme
    First seen Jun 17, 2026

    PACKET_EDIT_MEME.c (aka CVE-2026-46331): yet another page cache poisoning nightmare

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-46331?
CVE-2026-46331 is a high vulnerability published on June 16, 2026. In the Linux kernel, the following vulnerability has been resolved: net/sched: fix pedit partial COW leading to page cache corruption tcfpeditact() computes the COW range for skbensurewritable() once before the key loop using tcfpoffmax_hint, but the hint does not account for the runtime header…
When was CVE-2026-46331 disclosed?
CVE-2026-46331 was first published in the National Vulnerability Database on June 16, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46331 actively exploited?
CVE-2026-46331 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46331?
CVE-2026-46331 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-46331?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46331, 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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