PatchTheCVECVE-2026-7007: The Zephyr ext2 file system validates the on-disk superblock in ext2_verify_disk_superblock() (subsys/fs/ext2/
CVE-2026-7007 is a medium-severity flaw (CVSS 4.6) affecting zephyr. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The Zephyr ext2 file system validates the on-disk superblock in ext2_verify_disk_superblock() (subsys/fs/ext2/ext2_impl.c) before completing a mount. The validator checked the magic number, block size, revision and feature flags, but did not verify that the on-disk fields s_blocks_per_group and s_inodes_per_group are non-zero. Both fields are read directly from the image and are later used as divisors during mount-time initialization. During mou
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.6 (Medium) |
| Attack vector | Physical |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 85%) |
| CISA exploited list | No |
| Weakness | CWE-369 |
| Published | 2026-07-24 |
| Last modified | 2026-10-24 |
Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-7007?
zephyr: upgrade to 4.5.0. Exact commands for each OS are on this page.
Is CVE-2026-7007 being exploited?
CVE-2026-7007 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-7007 affect?
CVE-2026-7007 affects zephyr. Severity is medium (CVSS 4.6). The Zephyr ext2 file system validates the on-disk superblock in ext2_verify_disk_superblock() (subsys/fs/ext2/ext2_impl.c) before completing a mount. The validator checked the magic number, block size, revision and feature flags, but did no
How urgent is CVE-2026-7007?
Priority 25/100. Public exploit reference
Related CVEs
- CVE-2026-10682 MEDIUM 6.6 UPGRADE The userspace verifier z_vrfy_log_filter_set() for the log_filter_set syscall in subsys/logging/log_mgmt.c per
- CVE-2026-10681 MEDIUM 6.5 UPGRADE In Zephyr's userspace dynamic-objects subsystem, thread_idx_alloc() in kernel/userspace/userspace.c allocated
- CVE-2026-10683 LOW 2.4 UPGRADE In the Synopsys DesignWare I2C driver (drivers/i2c/i2c_dw.c) operating in target/slave mode, the rx_full inter
- CVE-2026-10686 MEDIUM 5.8 UPGRADE Zephyr's IPv6 forwarding path re-sent routed unicast packets without ever decrementing the IPv6 hop limit
- CVE-2026-10685 HIGH 7.6 UPGRADE The Zephyr Bluetooth GATT client CCC-write response handler gatt_write_ccc_rsp() in subsys/bluetooth/host/gatt