CVE-2026-31464
published 2026-04-22CVE-2026-31464: In the Linux kernel, the following vulnerability has been resolved: scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done() A malicious or compromised…
PriorityP343high8.1CVSS 3.1
AVAACLPRNUINSUCHINAH
EPSS
0.27%
19.3th percentile
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.
Affected
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < d842348f8a00d5b1d7358f207eb34ffcf5b16df3 | d842348f8a00d5b1d7358f207eb34ffcf5b16df3 |
| linux | linux | >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < a007246cb6c9ebdc93dafbf63cc2d43d98f402cc | a007246cb6c9ebdc93dafbf63cc2d43d98f402cc |
| linux | linux | >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < 394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89 | 394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89 |
| linux | linux | >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < 4ed727e35b0ab17d3eeeb1e8023768396e2be161 | 4ed727e35b0ab17d3eeeb1e8023768396e2be161 |
| linux | linux | >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < d1466bf991b2343cf2ba8336e440c8faf3cbb780 | d1466bf991b2343cf2ba8336e440c8faf3cbb780 |
| linux | linux | >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < 786f10b1966e485046839f992e89f2c18cbd1983 | 786f10b1966e485046839f992e89f2c18cbd1983 |
| linux | linux | >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < bae4df0a643fa7f84663473aa3082a9c2ed139db | bae4df0a643fa7f84663473aa3082a9c2ed139db |
| linux | linux | >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < 61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f | 61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 2.6.27 < 5.10.253 | 5.10.253 |
| linux | linux_kernel | >= 5.11 < 5.15.203 | 5.15.203 |
| linux | linux_kernel | >= 5.16 < 6.1.168 | 6.1.168 |
| linux | linux_kernel | >= 6.13 < 6.18.21 | 6.18.21 |
| linux | linux_kernel | >= 6.19 < 6.19.11 | 6.19.11 |
| linux | linux_kernel | >= 6.2 < 6.6.131 | 6.6.131 |
| linux | linux_kernel | >= 6.7 < 6.12.80 | 6.12.80 |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
vendor_redhat7.0MEDIUM
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GHSA
GHSA-5q5q-53h5-v4v4: In the Linux kernel, the following vulnerability has been resolved:
scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()
A malicious or co
ghsa_unreviewed·2026-04-22
CVE-2026-31464 GHSA-5q5q-53h5-v4v4: In the Linux kernel, the following vulnerability has been resolved:
scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()
A malicious or co
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.
Red Hat
kernel: scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()
vendor_redhat·2026-04-22·CVSS 7.0
CVE-2026-31464 [MEDIUM] CWE-1285 kernel: scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()
kernel: scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()
A flaw was found in the Linux kernel's scsi: ibmvfc driver. A malicious or compromised Virtual I/O (VIO) server can exploit this by sending a crafted response during target discovery. This response can cause an out-of-bounds memory access, leading to the disclosure of sensitive kernel memory.
Package: kernel (Red Hat Enterprise Linux 10) - Affected
Package: kernel (Red Hat Enterprise Linux 6) - Out of support scope
Package: kernel (Red Hat Enterprise Linux 7) - Affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Affected
Package: kernel (Red Hat Enterprise Linux 8) - Affected
Package: kernel-rt (Red Hat Enterprise Linux 8) - Affected
Package: kernel (Red Hat Enterprise Linux 9) - Affected
Package: kernel
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89https://git.kernel.org/stable/c/4ed727e35b0ab17d3eeeb1e8023768396e2be161https://git.kernel.org/stable/c/61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362fhttps://git.kernel.org/stable/c/786f10b1966e485046839f992e89f2c18cbd1983https://git.kernel.org/stable/c/a007246cb6c9ebdc93dafbf63cc2d43d98f402cchttps://git.kernel.org/stable/c/bae4df0a643fa7f84663473aa3082a9c2ed139dbhttps://git.kernel.org/stable/c/d1466bf991b2343cf2ba8336e440c8faf3cbb780https://git.kernel.org/stable/c/d842348f8a00d5b1d7358f207eb34ffcf5b16df3
2026-04-22
Published