CVE-2026-90307
Estado: RecibidaSin puntuar—
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.
Leer descripción completaMostrar menos
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:
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.
Detalles técnicos trazas, registros y código del informe original
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)
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/001adf2fe87d1ab677c014a97467bbea5153ae5f
- https://git.kernel.org/stable/c/0e7ba617514902501514d577647d866e670dad90
- https://git.kernel.org/stable/c/138eb2f0ef02adfe6ad126afad5b54c56b5046ee
- https://git.kernel.org/stable/c/3787f4c3e0d813d6c56be9f6dfaf66f8551fb0a7
- https://git.kernel.org/stable/c/3f7fdf561f1ec3b523c39708df00bd808671668d
- https://git.kernel.org/stable/c/961ac0f0c5e414abdd6b33fae84b311d9fde0bd0
- https://git.kernel.org/stable/c/dc2272c00d7c00ee2a69b57f7ca9caaefcbdb8cd
- https://git.kernel.org/stable/c/fa1b33fdab3e79dce83721ead3220200a2dbec22
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-90307",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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{
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{
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"published": "2026-09-17T17:17:28.377",
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}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/srp: fix heap information leak on a truncated SRP_CRED_REQ\n\nsrp_recv_done() passes wc->byte_len to srp_process_rsp(). It passes\nnothing to srp_process_cred_req() and srp_process_aer_req(), which read\nfixed-size fields from the receive buffer without checking that those\nfields were received.\n\nThe buffer size is max_ti_iu_len, which comes from the login response\nand is not validated. A target that advertises 8 and then sends an\n8-byte SRP_CRED_REQ makes the initiator read req->tag from beyond the\nend of the buffer. req->tag is copied into the SRP_CRED_RSP and sent\nback, so those bytes reach the target. SRP_AER_REQ behaves the same way\nand also reads req->lun.\n\nThe leak is 8 bytes per response. max_ti_iu_len also decides which slab\ncache the buffer comes from. With 8 the buffer is a kmalloc-8 object and\nthe read is entirely outside it:\n\n BUG: KASAN: slab-out-of-bounds in srp_recv_done+0x172b/0x1aa0\n Read of size 8 at addr ffff888104714da8 by task kworker/u8:3/50\n which belongs to the cache kmalloc-8 of size 8\n The buggy address is located 0 bytes to the right of\n allocated 8-byte region [ffff888104714da0, ffff888104714da8)\n\nWithout KASAN the returned bytes are whatever is next in the slab. One\nrun returned \".strtab\".\n\nrsp->data[3] in srp_process_rsp() has the same problem: only\nresp_data_len is checked before it is read.\n\nDrop a request that is shorter than the structure being parsed, and\ncheck byte_len before the tsk_mgmt read."
}
],
"lastModified": "2026-09-17T17:17:28.377",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}