CVE-2026-10659

MEDIUMNVD 4.74.7—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.7 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 99% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
4.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.7Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The Dhara flash translation layer disk driver (drivers/disk/ftl_dhara.c) implemented the dhara_nand_ callbacks so that, on a flash error, the error code was written unconditionally through the caller-supplied dhara_error_t err pointer (e.g. *err = DHARA_E_ECC in dhara_nand_read, and similar in dhara_nand_erase/prog/copy).

The upstream Dhara library calls these callbacks with err == NULL along its journal-resume binary search: find_last_checkblock() invokes find_checkblock(j, mid, &found, NULL), which forwards the NULL pointer into dhara_nand_read(). This path runs during disk_ftl_access_init() -> dhara_map_resume() whenever the FTL disk is mounted/initialised.

If a flash read error (uncorrectable ECC, bad block, controller error) occurs on one of the probed checkpoint pages, the driver dereferences and writes to NULL, faulting the kernel (denial of service). The trigger is conditioned on the NAND medium content/health, which can be influenced by media wear, induced faults, or a corrupted/crafted on-flash image.

The fix routes all error assignments through the library's NULL-safe dhara_set_error() helper. Affects Zephyr v4.4.0, where the driver was introduced.

CVSS v3
4.7
EG Score
4.7(medium)
EPSS
0.9%
KEV
Not listed

Published

July 7, 2026

Last Modified

July 14, 2026

Advisory Details (2)

Auto-updated Jul 8, 2026
Patch available. Sources: github_commit, github.
github Patch Available

NULL pointer dereference in Zephyr Dhara FTL disk driver on flash read error during journal resume · Advisory · zephyrproject-rtos/zephyr · GitHub

https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-q28v-3729-f82g
github_commit

commit a8371b0d4719 (zephyrproject-rtos/zephyr)

Fix landed in zephyrproject-rtos/zephyr commit a8371b0d4719 — awaiting tagged release

https://github.com/zephyrproject-rtos/zephyr/commit/a8371b0d4719efe37a66e2abb618ad9b81792212

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 19× 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. 2026-07-15 18:41 UTCEG score recompute
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-14 20:41 UTCEG score recompute
  4. 2026-07-13 22:44 UTCEG score recompute
  5. 2026-07-13 22:30 UTCEPSS rescore
  6. 2026-07-13 06:12 UTCEPSS rescore
  7. 2026-07-13 00:48 UTCEG score recompute
  8. 2026-07-12 05:46 UTCEPSS rescore
  9. 2026-07-12 02:48 UTCEG score recompute
  10. 2026-07-11 08:27 UTCEPSS rescore
  11. 2026-07-11 04:52 UTCEG score recompute
  12. 2026-07-10 06:56 UTCEG score recompute
  13. 2026-07-09 19:10 UTCEPSS rescore
  14. 2026-07-09 08:59 UTCEG score recompute
  15. 2026-07-08 15:15 UTCEPSS rescore
  16. 2026-07-08 15:15 UTCEPSS rescore
  17. 2026-07-08 11:03 UTCEG score recompute
  18. 2026-07-07 13:07 UTCEG score recompute
  19. 2026-07-07 13:06 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-10659?
CVE-2026-10659 is a medium vulnerability published on July 7, 2026. The Dhara flash translation layer disk driver (drivers/disk/ftldhara.c) implemented the dharanand callbacks so that, on a flash error, the error code was written unconditionally through the caller-supplied dharaerrort err pointer (e.g. *err = DHARAEECC in dharanandread, and similar in…
When was CVE-2026-10659 disclosed?
CVE-2026-10659 was first published in the National Vulnerability Database on July 7, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-10659 actively exploited?
CVE-2026-10659 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-10659?
CVE-2026-10659 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2026-10659?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-10659, 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.

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