Unknown

CVE-2026-90307 — RDMA/srp: fix heap information leak on a truncated SRP_CRED_REQ

In the Linux kernel, the following vulnerability has been resolved: RDMA/srp: fix heap information leak on a truncated SRP_CRED_REQ srp_recv_done() passes wc->byte_len to srp_process_rsp(). It passes nothing to srp_process_cred_req() and srp_process_aer_req(), which read fixed-size fields from the receive buffer without checking that those fields were received. The buffer size is max_ti_iu_len, which comes from the login response and is not validated. A target that advertises 8 and then sends an 8-byte SRP_CRED_REQ makes the initiator read req->tag from beyond the end of the buffer. req->tag is copied into the SRP_CRED_RSP and sent back, so those bytes reach the target. SRP_AER_REQ behaves the same way and also reads req->lun. The leak is 8 bytes per response. max_ti_iu_len also decides which slab cache the buffer comes from. With 8 the buffer is a kmalloc-8 object and the read is entirely outside it: BUG: KASAN: slab-out-of-bounds in srp_recv_done+0x172b/0x1aa0 Read of size 8 at addr ffff888104714da8 by task kworker/u8:3/50 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes to the right of allocated 8-byte region [ffff888104714da0, ffff888104714da8) Without KASAN the returned bytes are whatever is next in the slab. One run returned ".strtab". rsp->data[3] in srp_process_rsp() has the same problem: only resp_data_len is checked before it is read. Drop a request that is shorter than the structure being parsed, and check byte_len before the tsk_mgmt read.

Published Sep 17, 2026 · Updated Oct 19, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+2

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.21%

ahead of 11% of scored CVEs · Oct 18, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ bb12588a38e6db85e01dceadff7bc161fc92e7d2 and < 3f7fdf561f1ec3b523c39708df00bd808671668d≥ bb12588a38e6db85e01dceadff7bc161fc92e7d2 and < 138eb2f0ef02adfe6ad126afad5b54c56b5046ee≥ bb12588a38e6db85e01dceadff7bc161fc92e7d2 and < 3787f4c3e0d813d6c56be9f6dfaf66f8551fb0a7≥ bb12588a38e6db85e01dceadff7bc161fc92e7d2 and < 0e7ba617514902501514d577647d866e670dad90≥ bb12588a38e6db85e01dceadff7bc161fc92e7d2 and < 001adf2fe87d1ab677c014a97467bbea5153ae5f≥ bb12588a38e6db85e01dceadff7bc161fc92e7d2 and < dc2272c00d7c00ee2a69b57f7ca9caaefcbdb8cd≥ bb12588a38e6db85e01dceadff7bc161fc92e7d2 and < fa1b33fdab3e79dce83721ead3220200a2dbec22≥ bb12588a38e6db85e01dceadff7bc161fc92e7d2 and < 961ac0f0c5e414abdd6b33fae84b311d9fde0bd0 and 1 more version 2.6.37	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 18, 2026 · 3 reading(s) · max 0.21%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 17, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 19, 2026 – Oct 19, 2026
1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

10 on the record

git.kernel.org/stable/c/138eb2f0ef02adfe6ad126afad5b54c56b5046ee
NIST National Vulnerability Database
git.kernel.org/stable/c/dc2272c00d7c00ee2a69b57f7ca9caaefcbdb8cd
NIST National Vulnerability Database
git.kernel.org/stable/c/3787f4c3e0d813d6c56be9f6dfaf66f8551fb0a7
NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2026-90307
GitHub Security Advisories
git.kernel.org/stable/c/3f7fdf561f1ec3b523c39708df00bd808671668d
NIST National Vulnerability Database
git.kernel.org/stable/c/961ac0f0c5e414abdd6b33fae84b311d9fde0bd0
NIST National Vulnerability Database
git.kernel.org/stable/c/fa1b33fdab3e79dce83721ead3220200a2dbec22
NIST National Vulnerability Database
git.kernel.org/stable/c/0e7ba617514902501514d577647d866e670dad90
NIST National Vulnerability Database
git.kernel.org/stable/c/001adf2fe87d1ab677c014a97467bbea5153ae5f
NIST National Vulnerability Database
github.com/advisories/GHSA-24j7-gr38-qhjc
GitHub Security Advisories

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-98866 sched/cache: Introduce task_struct->sched_cache_grp to fix UAF 1d
Unknown CVE-2026-98867 dm-pcache: bound the logical key offset from persistent memory 1d
Unknown CVE-2026-98868 dm-pcache: reject a kset that overruns its segment 1d
Unknown CVE-2026-98856 kprobes: Skip disarmed probes when checking optkprobe overlap 1d
Unknown CVE-2026-98857 ipvs: bound LBLCR and LBLC cache growth 1d
Unknown CVE-2026-98858 io_uring: fix task_work add use-after-free with SQPOLL 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-90307 is "RDMA/srp: fix heap information leak on a truncated SRP_CRED_REQ", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.21% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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