Host crash via stale NVMe/TCP receive iterator
Published Sep 11, 2026 · Updated Sep 11, 2026
Memory corruption in the Linux kernel NVMe/TCP host driver allows remote attackers controlling a target to crash hosts via crafted C2HData. The nvme_tcp_handle_c2h_data() gate accepts data for WRITE_ZEROES from blk_rq_payload_bytes() alone, then nvme_tcp_recv_data() copies through a residual iterator left on the reused tag. Exploitation requires a connected malicious NVMe/TCP target to return C2HData for that command; the demonstrated consequence is a wild kernel-memory write and host crash.
Summary
What happened
Memory corruption in the Linux kernel NVMe/TCP host driver allows remote attackers controlling a target to crash hosts via crafted C2HData. The nvme_tcp_handle_c2h_data() gate accepts data for WRITE_ZEROES from blk_rq_payload_bytes() alone, then nvme_tcp_recv_data() copies through a residual iterator left on the reused tag. Exploitation requires a connected malicious NVMe/TCP target to return C2HData for that command; the demonstrated consequence is a wild kernel-memory write and host crash.
The record
- CVE
- CVE-2026-89482
- Published
- Sep 11, 2026
- Updated
- Sep 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1499.004
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 11, 2026CVE publishedPublication date reported by the CVE source.
- Sep 11, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=25e5cb780e62bde432b401f312bb847edc78b432 <3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36
- Affected versionversion=25e5cb780e62bde432b401f312bb847edc78b432 <641ad3a30ba560f0a9a610376c568d7b75d2a2aa
- Affected versionversion=25e5cb780e62bde432b401f312bb847edc78b432 <6a01b58263108eaf9869bb6f82f07709240c6589
- Affected versionversion=25e5cb780e62bde432b401f312bb847edc78b432 <b36161701cb366f416afdcf70771d432a7c74753
- Affected versionversion=5.4.36 <5.5
- Affected versionversion=5.6.8 <5.7
- Affected versionversion=5.7
- Affected versionversion=b1458c16f4e26e87492e58e4d24a1873bd09232a
- Affected versionversion=f507ae6e33cbe56c4e3fe000434fc0ecc263d098
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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