CVE-2026-90307RDMA/srp: fix heap information leak on a truncated SRP_CRED_REQ
- —Not scoredno CVSS score yet
- 0.22%Exploitation in 30 daysEPSS · top 88% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 32 days later
· 32 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.22% · top 88% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected bb12588a38e6db85e01dceadff7bc161fc92e7d2 – < 3f7fdf561f1ec3b523c39708df00bd808671668d
- affected bb12588a38e6db85e01dceadff7bc161fc92e7d2 – < 138eb2f0ef02adfe6ad126afad5b54c56b5046ee
- affected bb12588a38e6db85e01dceadff7bc161fc92e7d2 – < 3787f4c3e0d813d6c56be9f6dfaf66f8551fb0a7
- affected bb12588a38e6db85e01dceadff7bc161fc92e7d2 – < 0e7ba617514902501514d577647d866e670dad90
- affected bb12588a38e6db85e01dceadff7bc161fc92e7d2 – < 001adf2fe87d1ab677c014a97467bbea5153ae5f
- affected bb12588a38e6db85e01dceadff7bc161fc92e7d2 – < dc2272c00d7c00ee2a69b57f7ca9caaefcbdb8cd
- affected bb12588a38e6db85e01dceadff7bc161fc92e7d2 – < fa1b33fdab3e79dce83721ead3220200a2dbec22
- affected bb12588a38e6db85e01dceadff7bc161fc92e7d2 – < 961ac0f0c5e414abdd6b33fae84b311d9fde0bd0
- affected 2.6.37
- unaffected < 2.6.37
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/3f7fdf561f1ec3b523c39708df00bd808671668d (opens in a new tab)
- https://git.kernel.org/stable/c/138eb2f0ef02adfe6ad126afad5b54c56b5046ee (opens in a new tab)
- https://git.kernel.org/stable/c/3787f4c3e0d813d6c56be9f6dfaf66f8551fb0a7 (opens in a new tab)
- https://git.kernel.org/stable/c/0e7ba617514902501514d577647d866e670dad90 (opens in a new tab)
- https://git.kernel.org/stable/c/001adf2fe87d1ab677c014a97467bbea5153ae5f (opens in a new tab)
- https://git.kernel.org/stable/c/dc2272c00d7c00ee2a69b57f7ca9caaefcbdb8cd (opens in a new tab)
- https://git.kernel.org/stable/c/fa1b33fdab3e79dce83721ead3220200a2dbec22 (opens in a new tab)
- https://git.kernel.org/stable/c/961ac0f0c5e414abdd6b33fae84b311d9fde0bd0 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-81968 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-90307)Record last updated .