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_
CVE-2026-90307
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90307
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "bb12588a38e6db85e01dceadff7bc161fc92e7d2",
"lessThan": "3f7fdf561f1ec3b523c39708df00bd808671668d",
"versionType": "git"
},
{
"status": "affected",
"version": "bb12588a38e6db85e01dceadff7bc161fc92e7d2",
"lessThan": "138eb2f0ef02adfe6ad126afad5b54c56b5046ee",
"versionType": "git"
},
{
"status": "affected",
"version": "bb12588a38e6db85e01dceadff7bc161fc92e7d2",
"lessThan": "3787f4c3e0d813d6c56be9f6dfaf66f8551fb0a7",
"versionType": "git"
},
{
"status": "affected",
"version": "bb12588a38e6db85e01dceadff7bc161fc92e7d2",
"lessThan": "0e7ba617514902501514d577647d866e670dad90",
"versionType": "git"
},
{
"status": "affected",
"version": "bb12588a38e6db85e01dceadff7bc161fc92e7d2",
"lessThan": "001adf2fe87d1ab677c014a97467bbea5153ae5f",
"versionType": "git"
},
{
"status": "affected",
"version": "bb12588a38e6db85e01dceadff7bc161fc92e7d2",
"lessThan": "dc2272c00d7c00ee2a69b57f7ca9caaefcbdb8cd",
"versionType": "git"
},
{
"status": "affected",
"version": "bb12588a38e6db85e01dceadff7bc161fc92e7d2",
"lessThan": "fa1b33fdab3e79dce83721ead3220200a2dbec22",
"versionType": "git"
},
{
"status": "affected",
"version": "bb12588a38e6db85e01dceadff7bc161fc92e7d2",
"lessThan": "961ac0f0c5e414abdd6b33fae84b311d9fde0bd0",
"versionType": "git"
}
],
"programFiles": [
"drivers/infiniband/ulp/srp/ib_srp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.37"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.37",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/infiniband/ulp/srp/ib_srp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90307
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36661 · Revision 1
- Added to Heist Feed
- Publisher date