- 7.5HighCVSS base score
- 0.43%Exploitation in 30 daysEPSS · top 62% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix host memory disclosure on R2T for a read command nvme_tcp_handle_r2t() does not check the direction of the request the R2T refers to. A malicious controller can send an R2T for a READ and the host will answer it: nvme_tcp_setup_h2c_data_pdu() builds the H2CData header and nvme_tcp_try_send_data() sends the request's data buffer. That buffer is the READ destination, so its contents go to the controller. The command then completes normally and nothing is logged. Against a test controller that answers every READ with an R2T, a 4096 byte buffered read returned all 4096 bytes, split over two R2Ts. The pages contained stale kernel data, including an array of struct page pointers. Reject an R2T for a request that is not a write.
Timeline
ID reserved
By Linux
Published
- 49 days later
· 49 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVDNVD · Received | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.43% · top 62% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected 3f2304f8c6d6ed97849057bd16fee99e434ca796 – < effe898669c5f69ed519d6339be01ee9cd91d1a4
- affected 3f2304f8c6d6ed97849057bd16fee99e434ca796 – < 377aa04d7b3e73ffef6364818def188da8d6f025
- affected 3f2304f8c6d6ed97849057bd16fee99e434ca796 – < 49a4dcf57608ebf6432dbcb203ed25e7ed581445
- affected 3f2304f8c6d6ed97849057bd16fee99e434ca796 – < bc4013c7cce58d46f792c8c87bc8c8318a70190e
- affected 3f2304f8c6d6ed97849057bd16fee99e434ca796 – < a4c3c7310156493797c920b10d8648c07aa05403
- affected 3f2304f8c6d6ed97849057bd16fee99e434ca796 – < 3b3d27670c0c890ba7cf1bc3614cab61bde6d25c
- affected 3f2304f8c6d6ed97849057bd16fee99e434ca796 – < 3a0b05145053a5fad1a2ddb4e4d87b07385e63e5
- affected 3f2304f8c6d6ed97849057bd16fee99e434ca796 – < 6efbc52237facda35d2d874fe1765bb4839275d8
- affected 5.0
- unaffected < 5.0
- unaffected 5.10.273 – ≤ 5.10.*
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/effe898669c5f69ed519d6339be01ee9cd91d1a4 (opens in a new tab)
- https://git.kernel.org/stable/c/377aa04d7b3e73ffef6364818def188da8d6f025 (opens in a new tab)
- https://git.kernel.org/stable/c/49a4dcf57608ebf6432dbcb203ed25e7ed581445 (opens in a new tab)
- https://git.kernel.org/stable/c/bc4013c7cce58d46f792c8c87bc8c8318a70190e (opens in a new tab)
- https://git.kernel.org/stable/c/a4c3c7310156493797c920b10d8648c07aa05403 (opens in a new tab)
- https://git.kernel.org/stable/c/3b3d27670c0c890ba7cf1bc3614cab61bde6d25c (opens in a new tab)
- https://git.kernel.org/stable/c/3a0b05145053a5fad1a2ddb4e4d87b07385e63e5 (opens in a new tab)
- https://git.kernel.org/stable/c/6efbc52237facda35d2d874fe1765bb4839275d8 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76387 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89481)Record last updated .