- 9.8CriticalCVSS base score
- 0.71%Exploitation in 30 daysEPSS · top 46% 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: nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU nvmet_tcp_try_recv_pdu() reads a PDU header into the fixed 128-byte queue->pdu union, then computes the remaining payload length as queue->left = hdr->hlen - queue->offset + hdgst; and reads that many more bytes into &queue->pdu + queue->offset, without ever bounding the result against sizeof(queue->pdu). A struct nvme_tcp_icreq_pdu is itself 128 bytes, exactly the size of the union. Once a header digest has been negotiated (hdgst = 4), a second ICReq passes the hlen == nvmet_tcp_pdu_size() check but yields queue->left = 128 - 8 + 4 = 124, so bytes 8..132 are written into the 128-byte buffer -- 4 bytes past its end, over queue->hdr_digest and queue->data_digest. Those bytes are attacker-controlled (an ICReq carries no digest), and the duplicate ICReq is only rejected later, after the overflow. A remote unauthenticated host can thus corrupt kernel memory adjacent to the receive buffer. Reject any PDU whose declared length would read past the end of queue->pdu before the second recv.
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 33 days later
· 33 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 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.71% · top 46% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < a3f0bcfbaf3312a5754d1ce020a07d394669eb25
- affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < 4f84d42c53c49557fb1ef285c683b0a81b576c74
- affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < 58dc6035b79c4c73c0cbf9ec9f68a7f117b2b3e6
- affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < cf5f39d2b58f97e0cd1829c4a6aeef17f1607cca
- affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < 3a385e0c39efbe34db8edd95900c123113ae3450
- affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < dbc4acbdb3ca8c81441368ad7409b8f77d4de8f6
- affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < d95d342bc0ea82dc79e6362b2f1f997431750e4c
- affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 – < 14cc5a7e77731497d5bea70f3bb05df7eda982e4
- affected 5.0
- unaffected < 5.0
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.51 – ≤ 6.18.*
- unaffected 7.2.5 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/a3f0bcfbaf3312a5754d1ce020a07d394669eb25 (opens in a new tab)
- https://git.kernel.org/stable/c/4f84d42c53c49557fb1ef285c683b0a81b576c74 (opens in a new tab)
- https://git.kernel.org/stable/c/58dc6035b79c4c73c0cbf9ec9f68a7f117b2b3e6 (opens in a new tab)
- https://git.kernel.org/stable/c/cf5f39d2b58f97e0cd1829c4a6aeef17f1607cca (opens in a new tab)
- https://git.kernel.org/stable/c/3a385e0c39efbe34db8edd95900c123113ae3450 (opens in a new tab)
- https://git.kernel.org/stable/c/dbc4acbdb3ca8c81441368ad7409b8f77d4de8f6 (opens in a new tab)
- https://git.kernel.org/stable/c/d95d342bc0ea82dc79e6362b2f1f997431750e4c (opens in a new tab)
- https://git.kernel.org/stable/c/14cc5a7e77731497d5bea70f3bb05df7eda982e4 (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-2026-80569 (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-2026-89969)Record last updated .