CVE-2026-74394 (GCVE-0-2026-74394)
Vulnerability from cvelistv5 – Published: 2026-08-15 05:59 – Updated: 2026-10-16 19:05
VLAI
EPSS
VEX
Title
RDMA/srpt: fix integer overflow in immediate data length check
Summary
In the Linux kernel, the following vulnerability has been resolved:
RDMA/srpt: fix integer overflow in immediate data length check
imm_buf->len is a user-controlled uint32_t received from the network.
Adding it to imm_data_offset without overflow checking allows a
malicious initiator to send len=0xFFFFFFFF, causing req_size to wrap
around to a small value, bypassing the bounds check, and subsequently
passing a ~4GB length to sg_init_one().
Use check_add_overflow() to detect wrapping before the comparison.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 18:55 UTC
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 , < c82c860f8c8e4f4f454c9f14d0ad0c0466965f7d
(git)
Affected: 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 , < 3efa5301137140a3ca3677a9098c0a93a0acfd49 (git) Affected: 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 , < 067b9556eeb007f28b7c2033b4dcde5b6d88418f (git) Affected: 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 , < dcf7a986f377cce0749ed53f1d64195fbd5fdf91 (git) Affected: 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 , < 07dec3f6dcb6c6cc891162d252b800eb0e6d5e8e (git) Affected: 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 , < 65572fbd86033ae2370125593d59b8be34253aaf (git) Affected: 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 , < 72497172a4799119a0282a5eb5e2b8ddcc821921 (git) Affected: 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 , < eb4ecdf631fe00e8020bf461503cb9b7017ed796 (git) |
guessed | |
| Linux | Linux |
Affected:
5.0
Unaffected: 0 , < 5.0 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
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"dateUpdated": "2026-10-16T18:55:19.899Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/ulp/srpt/ib_srpt.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "c82c860f8c8e4f4f454c9f14d0ad0c0466965f7d",
"status": "affected",
"version": "5dabcd0456d7ee17c2c7a17d7c2305444d2b9639",
"versionType": "git"
},
{
"lessThan": "3efa5301137140a3ca3677a9098c0a93a0acfd49",
"status": "affected",
"version": "5dabcd0456d7ee17c2c7a17d7c2305444d2b9639",
"versionType": "git"
},
{
"lessThan": "067b9556eeb007f28b7c2033b4dcde5b6d88418f",
"status": "affected",
"version": "5dabcd0456d7ee17c2c7a17d7c2305444d2b9639",
"versionType": "git"
},
{
"lessThan": "dcf7a986f377cce0749ed53f1d64195fbd5fdf91",
"status": "affected",
"version": "5dabcd0456d7ee17c2c7a17d7c2305444d2b9639",
"versionType": "git"
},
{
"lessThan": "07dec3f6dcb6c6cc891162d252b800eb0e6d5e8e",
"status": "affected",
"version": "5dabcd0456d7ee17c2c7a17d7c2305444d2b9639",
"versionType": "git"
},
{
"lessThan": "65572fbd86033ae2370125593d59b8be34253aaf",
"status": "affected",
"version": "5dabcd0456d7ee17c2c7a17d7c2305444d2b9639",
"versionType": "git"
},
{
"lessThan": "72497172a4799119a0282a5eb5e2b8ddcc821921",
"status": "affected",
"version": "5dabcd0456d7ee17c2c7a17d7c2305444d2b9639",
"versionType": "git"
},
{
"lessThan": "eb4ecdf631fe00e8020bf461503cb9b7017ed796",
"status": "affected",
"version": "5dabcd0456d7ee17c2c7a17d7c2305444d2b9639",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/infiniband/ulp/srpt/ib_srpt.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.0"
},
{
"lessThan": "5.0",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.261",
"versionStartIncluding": "5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.212",
"versionStartIncluding": "5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.178",
"versionStartIncluding": "5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.145",
"versionStartIncluding": "5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.97",
"versionStartIncluding": "5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.40",
"versionStartIncluding": "5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.5",
"versionStartIncluding": "5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "5.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/srpt: fix integer overflow in immediate data length check\n\nimm_buf-\u003elen is a user-controlled uint32_t received from the network.\nAdding it to imm_data_offset without overflow checking allows a\nmalicious initiator to send len=0xFFFFFFFF, causing req_size to wrap\naround to a small value, bypassing the bounds check, and subsequently\npassing a ~4GB length to sg_init_one().\n\nUse check_add_overflow() to detect wrapping before the comparison."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - SRPT is an in-kernel SCSI RDMA target reached by remote initiators over InfiniBand/RoCE via RDMA/IB CM; malicious SRP_CMD IUs are delivered through `srpt_recv_done()` without any local syscall or physical access.\nAC:L - Once connected on an immediate-data SRPT target (use_srq=0), a malicious initiator deterministically sets `imm_buf-\u003elen=0xFFFFFFFF` to wrap `req_size` and bypass checks; no race or attacker-uncontrollable condition is required.\nPR:N - SRPT enables LIO demo mode (`srpt_check_true`), so any remote initiator that completes SRP login on an enabled target gets a dynamic ACL without target-local credentials, root, or CAP_NET_ADMIN on the victim host.\nUI:N - Exploitation requires only attacker-initiated RDMA connection, SRP login, and crafted SRP_CMD traffic; no administrator or other user must mount storage or perform any action on the target.\nS:U - The integer overflow corrupts kernel heap memory and SCSI-target processing within the host kernel\u0027s own security authority; it does not cross VM, IOMMU, or container sandbox boundaries.\nC:H - Passing a ~4GB length to `sg_init_one()` on a small receive buffer creates a massive out-of-bounds scatterlist; subsequent target-core DMA/map operations can read far beyond the buffer, enabling arbitrary kernel memory disclosure.\nI:H - The bogus scatterlist gives the block/SCSI target path an attacker-controlled ~4GB kernel memory write/read primitive over adjacent heap objects, exploitable for control-flow hijacking and privilege escalation.\nA:H - Out-of-bounds access from a ~4GB scatterlist on a kilobyte-scale receive buffer readily triggers kernel oops, KASAN faults, or panic, denying availability even before full exploitation."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:46:39.840Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
{
"url": "https://git.kernel.org/stable/c/c82c860f8c8e4f4f454c9f14d0ad0c0466965f7d"
},
{
"url": "https://git.kernel.org/stable/c/3efa5301137140a3ca3677a9098c0a93a0acfd49"
},
{
"url": "https://git.kernel.org/stable/c/067b9556eeb007f28b7c2033b4dcde5b6d88418f"
},
{
"url": "https://git.kernel.org/stable/c/dcf7a986f377cce0749ed53f1d64195fbd5fdf91"
},
{
"url": "https://git.kernel.org/stable/c/07dec3f6dcb6c6cc891162d252b800eb0e6d5e8e"
},
{
"url": "https://git.kernel.org/stable/c/65572fbd86033ae2370125593d59b8be34253aaf"
},
{
"url": "https://git.kernel.org/stable/c/72497172a4799119a0282a5eb5e2b8ddcc821921"
},
{
"url": "https://git.kernel.org/stable/c/eb4ecdf631fe00e8020bf461503cb9b7017ed796"
}
],
"title": "RDMA/srpt: fix integer overflow in immediate data length check",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-74394",
"datePublished": "2026-08-15T05:59:07.144Z",
"dateReserved": "2026-08-15T05:44:03.891Z",
"dateUpdated": "2026-10-16T19:05:40.869Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.