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CVE

CVE-2026-98323

RDMA/siw: Bound fragmented header copies by the remaining length
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CVE

CVE-2026-98323

RDMA/siw: Bound fragmented header copies by the remaining length

In the Linux kernel, the following vulnerability has been resolved:

RDMA/siw: Bound fragmented header copies by the remaining length

siwgethdr() 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 - MINDDPHDR instead

of the number of missing bytes. This makes the destination move past the

end of the header and overwrite the receive state, including

fpdupartrcvd. A later callback can then use a negative fpdupartrcvd

value as a copy offset, which creates an OOB write.

Use the number of header bytes already received when calculating the

next copy length.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://git.kernel.org/stable/c/262dcd809723723ed8a4e05437ec7e9c21a8f17e, https://git.kernel.org/stable/c/2c6fbcf4bfac0b2b186acc8d91154c0fa24468a7, https://git.kernel.org/stable/c/8628f8ebf41669302513fb3f0bf0eba38b226742, https://git.kernel.org/stable/c/9ff797e516dbc1ecb73701ec4c24055712d44411, https://git.kernel.org/stable/c/af9f5b474a260ad23ffb9793d716a5e3bbce3b48, https://git.kernel.org/stable/c/b72dcfb9bf1f0f0147cda03dc59e4002a315067f, https://git.kernel.org/stable/c/e6bdfdf3bcb02d0d626a45e8c98b7e63d2fddf9d, https://git.kernel.org/stable/c/eb4d7a946970469b3ab0c762432bf161d5b0836c, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98323.json, https://nvd.nist.gov/vuln/detail/CVE-2026-98323, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00514%
EPSS Percentile
0.43867%
Introduced Version
e3917c85f41ef1df64e27dc0e46ab0d803c5e73e,308cd50f174c95a507527037f4de1a0396aa4325,754209850df8367c954ac1de7671c7430b1f342c,5.10.150,5.15.75,5.4.220,5.19.17,6.0.3,e09caa38e10bcf027100cc22b0e3cc745a39ef0a,0c14f795a9eab9344230f9933798b8ee496f497d,7fada7c6962219b6fc4ff4e62e46a936af110dd9,0,5.11.0,5.16.0,6.1.0,6.2.0,6.7.0,6.13.0
Fix Available
2c6fbcf4bfac0b2b186acc8d91154c0fa24468a7,af9f5b474a260ad23ffb9793d716a5e3bbce3b48,9ff797e516dbc1ecb73701ec4c24055712d44411,5.10.271,5.15.222,5.5,5.20,6.1,6.1.189,6.6.158,6.12.112,6.18.54,7.2.8,6.1.190-1,6.12.113-1~deb12u1,6.12.113-1,7.0.0-42.42,7.0.0-1016.17,7.0.0-1016.18,7.0.0-1017.17,7.0.0-1015.16,7.0.0-42.42.1,5.15.0-1119.126~20.04.1,5.15.0-1125.134~20.04.1,5.15.0-1124.133~20.04.1,5.15.0-1120.130~20.04.1,5.15.0-202.212~20.04.1,5.15.0-1113.117~20.04.1,5.15.0-1114.120~20.04.1,5.15.0-197.207~20.04.1,5.15.0-1070.72~20.04.1,5.15.0-1116.122~20.04.1,5.15.0-1113.117~20.04.2,7.0.0-42.42~24.04.1,7.0.0-42.42.1~24.04.1,5.15.0-202.212,5.15.0-1119.126,5.15.0-1125.134,5.15.0-1120.130,5.15.0-1115.121,5.15.0-1102.110,5.15.0-1113.117,5.15.0-1114.120,5.15.0-1111.116,5.15.0-197.207,5.15.0-1114.115,5.15.0-1070.72,5.15.0-1059.59,5.15.0-1116.122

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