CVE-2025-38700

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Source
https://cve.org/CVERecord?id=CVE-2025-38700
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38700.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-38700
Downstream
Related
Published
2025-09-04T15:32:52.241Z
Modified
2026-03-12T02:14:28.299174Z
Summary
scsi: libiscsi: Initialize iscsi_conn->dd_data only if memory is allocated
Details

In the Linux kernel, the following vulnerability has been resolved:

scsi: libiscsi: Initialize iscsiconn->dddata only if memory is allocated

In case of an ibfastregmr allocation failure during iSER setup, the machine hits a panic because iscsiconn->dddata is initialized unconditionally, even when no memory is allocated (ddsize == 0). This leads invalid pointer dereference during connection teardown.

Fix by setting iscsiconn->dddata only if memory is actually allocated.

Panic trace:

iser: isercreatefastregdesc: Failed to allocate ibfastregmr err=-12 iser: iserallocrxdescriptors: failed allocating rx descriptors / data buffers BUG: unable to handle page fault for address: fffffffffffffff8 RIP: 0010:swakeuplocked.part.5+0xa/0x40 Call Trace: complete+0x31/0x40 iscsiiserconnstop+0x88/0xb0 [ibiser] iscsistopconn+0x66/0xc0 [scsitransportiscsi] iscsiifstopconn+0x14a/0x150 [scsitransportiscsi] iscsiifrx+0x1135/0x1834 [scsitransportiscsi] ? netlinklookup+0x12f/0x1b0 ? netlinkdelivertap+0x2c/0x200 netlinkunicast+0x1ab/0x280 netlinksendmsg+0x257/0x4f0 ? copyfromuser+0x29/0x60 sock_sendmsg+0x5f/0x70

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38700.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
5d91e209fb21fb9cc765729d4c6a85a9fb6c9187
Fixed
f53af99f441ee79599d8df6113a7144d74cf9153
Fixed
9ea6d961566c7d762ed0204b06db05756fdda3b6
Fixed
fd5aad080edb501ab5c84b7623d612d0e3033403
Fixed
a145c269dc5380c063a20a0db7e6df2995962e9d
Fixed
66a373f50b4249d57f5a88c7be9676f9d5884865
Fixed
35782c32528d82aa21f84cb5ceb2abd3526a8159
Fixed
a33d42b7fc24fe03f239fbb0880dd5b4b4b97c19
Fixed
2b242ea14386a510010eabfbfc3ce81a101f3802
Fixed
3ea3a256ed81f95ab0f3281a0e234b01a9cae605

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38700.json"