CVE-2026-31464
scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved: scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done() A malicious or compromised VIO server can return a num_written value in the
discover targets MAD response that exceeds max_targets. This value is
stored directly in vhost->num_targets without validation, and is then used
as the loop bound in ibmvfc_alloc_targets() to index into disc_buf[], which
is only allocated for max_targets entries. Indices at or beyond max_targets
access kernel memory outside the DMA-coherent allocation. The
out-of-bounds data is subsequently embedded in Implicit Logout and PLOGI
MADs that are sent back to the VIO server, leaking kernel memory. Fix by clamping num_written to max_targets before storing it.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2026-03-09 CVE Reserved
- 2026-04-22 CVE Published
- 2026-04-27 CVE Updated
- 2026-04-28 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/072b91f9c6510d0ec4a49d07dbc318760c7da7b3 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.27 < 5.10.253 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.27 < 5.10.253" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.27 < 5.15.203 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.27 < 5.15.203" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.27 < 6.1.168 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.27 < 6.1.168" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.27 < 6.6.131 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.27 < 6.6.131" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.27 < 6.12.80 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.27 < 6.12.80" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.27 < 6.18.21 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.27 < 6.18.21" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.27 < 6.19.11 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.27 < 6.19.11" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.27 < 7.0 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.27 < 7.0" | en |
Affected
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