CVE-2026-46331

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-16. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Elevated
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: Elevated riskExposed services: Not assessed

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
7.8HIGHmedium confidence
EG Risk
51
EG Risk 51/100

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%
Exploitation40% × 40%
Automatability0% × 15%
EPSS PROB
0.2%
EPSS %ILE
9th
KEV
Not listed

Published

June 16, 2026

Last Modified

September 15, 2026

Advisory Details (4)

Auto-updated Jun 28, 2026
Patch available.
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(25)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhcos-413.92.202607141229-02026-07-23redhat
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
redhatrhcos-4.22.9.8.202606230855-02026-06-30redhat
redhatkernel-0:6.12.0-231.13.el10nv2026-06-30redhat
redhatrhcos-4.21.9.6.202606241859-02026-06-30redhat
redhatrhcos-4.20.9.6.202606241928-02026-06-30redhat
redhatkpatch-patch2026-06-29redhat
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-0:6.12.0-212.11.el10nv2026-06-22redhat
redhatkernel-0:6.12.0-55.82.1.el10_02026-06-22redhat
redhatkernel-0:4.18.0-305.195.1.el8_42026-06-22redhat
redhatkernel-rt-0:5.14.0-284.177.1.rt14.462.el9_22026-06-22redhat
redhatkernel-0:5.14.0-427.134.1.el9_42026-06-22redhat
redhatkernel-0:4.18.0-372.197.1.el8_62026-06-22redhat
redhatkernel-0:5.14.0-687.17.1.el9_82026-06-22redhat
redhatkernel-0:6.12.0-211.26.1.el10_22026-06-20redhat
redhatkernel-0:4.18.0-477.148.1.el8_82026-06-19redhat
linuxKernel @ 5.10.260 (fixes >=0)—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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (55 versions)
  • every version up to 5.10.262-1: fixed in 5.10.262-1
—
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)
  • every version up to 6.1.176-1~deb11u1: fixed in 6.1.176-1~deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)
  • every version up to 6.1.176-1: fixed in 6.1.176-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)
  • every version up to 6.12.94-1: fixed in 6.12.94-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (146 versions)
  • every version up to 7.0.13-1: fixed in 7.0.13-1
—

Weakness Classification(2)

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

Additional Vendor Advisories

(12)

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 6× in last 7d / 28× 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 326 total refreshes for this CVE.

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

Publicly available exploits

(6 references)

Working exploit code is in the public domain (6 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCrjt-gupta/page-cache-corruption-lpes
    First seen Jul 22, 2026

    CVE-2026-46331 and CVE-2026-43503

    Open source ↗
  • 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 on June 16, 2026, with the most recent update on September 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 0.2% probability of exploitation in the next 30 days (9th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-46331?
CVE-2026-46331 has a CVSS base score of 7.8 (the CNA's own assessment, by linux; NVD's own analysis pending).
How do I remediate CVE-2026-46331?
A fix for CVE-2026-46331 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-46331 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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