CVE-2026-98323RDMA/siw: Bound fragmented header copies by the remaining length
Updated under an hour ago ()
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It affects Linux. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.56%, higher than 45% of scored CVEs.
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In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Bound fragmented header copies by the remaining length siw_get_hdr() can receive an extended DDP/RDMAP header across more than one TCP callback. The first callback may receive most of the header, while the next one still limits the copy to hdrlen - MIN_DDP_HDR instead of the number of missing bytes. This makes the destination move past the end of the header and overwrite the receive state, including fpdu_part_rcvd. A later callback can then use a negative fpdu_part_rcvd value as a copy offset, which creates an OOB write. Use the number of header bytes already received when calculating the next copy length.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.56% (percentile 45)
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from e3917c85f41ef1df64e27dc0e46ab0d803c5e73e before 2c6fbcf4bfac0b2b186acc8d91154c0fa24468a7; from 308cd50f174c95a507527037f4de1a0396aa4325 before af9f5b474a260ad23ffb9793d716a5e3bbce3b48; 754209850df8367c954ac1de7671c7430b1f342c builds before 262dcd809723723ed8a4e05437ec7e9c21a8f17e; from 754209850df8367c954ac1de7671c7430b1f342c before eb4d7a946970469b3ab0c762432bf161d5b0836c; 754209850df8367c954ac1de7671c7430b1f342c builds before 8628f8ebf41669302513fb3f0bf0eba38b226742; from 754209850df8367c954ac1de7671c7430b1f342c before b72dcfb9bf1f0f0147cda03dc59e4002a315067f; from 754209850df8367c954ac1de7671c7430b1f342c before e6bdfdf3bcb02d0d626a45e8c98b7e63d2fddf9d; 754209850df8367c954ac1de7671c7430b1f342c builds before 9ff797e516dbc1ecb73701ec4c24055712d44411; and 8 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/2c6fbcf4bfac0b2b186acc8d91154c0fa24468a7
- https://git.kernel.org/stable/c/af9f5b474a260ad23ffb9793d716a5e3bbce3b48
- https://git.kernel.org/stable/c/262dcd809723723ed8a4e05437ec7e9c21a8f17e
- https://git.kernel.org/stable/c/eb4d7a946970469b3ab0c762432bf161d5b0836c
- https://git.kernel.org/stable/c/8628f8ebf41669302513fb3f0bf0eba38b226742
- https://git.kernel.org/stable/c/b72dcfb9bf1f0f0147cda03dc59e4002a315067f
- https://git.kernel.org/stable/c/e6bdfdf3bcb02d0d626a45e8c98b7e63d2fddf9d
- https://git.kernel.org/stable/c/9ff797e516dbc1ecb73701ec4c24055712d44411
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.