scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-31464
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-22 14:16:42 UTC
Updated2026-04-22 14:16:42 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 d842348f8a00d5b1d7358f207eb34ffcf5b16df3 git Not specified
CNA Linux Linux affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 a007246cb6c9ebdc93dafbf63cc2d43d98f402cc git Not specified
CNA Linux Linux affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89 git Not specified
CNA Linux Linux affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 4ed727e35b0ab17d3eeeb1e8023768396e2be161 git Not specified
CNA Linux Linux affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 d1466bf991b2343cf2ba8336e440c8faf3cbb780 git Not specified
CNA Linux Linux affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 786f10b1966e485046839f992e89f2c18cbd1983 git Not specified
CNA Linux Linux affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 bae4df0a643fa7f84663473aa3082a9c2ed139db git Not specified
CNA Linux Linux affected 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f git Not specified
CNA Linux Linux affected 2.6.27 Not specified
CNA Linux Linux unaffected 2.6.27 semver Not specified
CNA Linux Linux unaffected 5.10.253 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.203 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.168 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.131 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.80 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.21 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.11 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/a007246cb6c9ebdc93dafbf63cc2d43d98f402cc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4ed727e35b0ab17d3eeeb1e8023768396e2be161 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d842348f8a00d5b1d7358f207eb34ffcf5b16df3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bae4df0a643fa7f84663473aa3082a9c2ed139db 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d1466bf991b2343cf2ba8336e440c8faf3cbb780 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/786f10b1966e485046839f992e89f2c18cbd1983 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report