CVE-2026-90307Network attack vector

Heap disclosure via truncated SRP request parsing

Published Sep 17, 2026 · Updated Sep 17, 2026

Linux RDMA/srp heap disclosure allows remote attackers controlling an SRP target to read memory via truncated requests. srp_process_cred_req() and srp_process_aer_req() read fixed-size fields without checking received lengths, then return the out-of-bounds tag bytes to the target. Exposure requires an initiator connection to a malicious target that advertises an undersized receive buffer; each response discloses eight bytes of adjacent heap memory.

CVSS severity6.9
Medium
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Linux RDMA/srp heap disclosure allows remote attackers controlling an SRP target to read memory via truncated requests. srp_process_cred_req() and srp_process_aer_req() read fixed-size fields without checking received lengths, then return the out-of-bounds tag bytes to the target. Exposure requires an initiator connection to a malicious target that advertises an undersized receive buffer; each response discloses eight bytes of adjacent heap memory.

The record

CVE
CVE-2026-90307
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.37
  2. Affected versionversion=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <001adf2fe87d1ab677c014a97467bbea5153ae5f
  3. Affected versionversion=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <0e7ba617514902501514d577647d866e670dad90
  4. Affected versionversion=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <138eb2f0ef02adfe6ad126afad5b54c56b5046ee
  5. Affected versionversion=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <3787f4c3e0d813d6c56be9f6dfaf66f8551fb0a7
  6. Affected versionversion=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <3f7fdf561f1ec3b523c39708df00bd808671668d
  7. Affected versionversion=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <961ac0f0c5e414abdd6b33fae84b311d9fde0bd0
  8. Affected versionversion=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <dc2272c00d7c00ee2a69b57f7ca9caaefcbdb8cd
  9. Affected versionversion=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <fa1b33fdab3e79dce83721ead3220200a2dbec22

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.37; version=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <001adf2fe87d1ab677c014a97467bbea5153ae5f; version=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <0e7ba617514902501514d577647d866e670dad90; version=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <138eb2f0ef02adfe6ad126afad5b54c56b5046ee; version=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <3787f4c3e0d813d6c56be9f6dfaf66f8551fb0a7; version=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <3f7fdf561f1ec3b523c39708df00bd808671668d; version=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <961ac0f0c5e414abdd6b33fae84b311d9fde0bd0; version=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <dc2272c00d7c00ee2a69b57f7ca9caaefcbdb8cd; version=bb12588a38e6db85e01dceadff7bc161fc92e7d2 <fa1b33fdab3e79dce83721ead3220200a2dbec22

Published CVSS scores

6.9SUSECVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
5.3Amazon LinuxCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3SUSECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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