CVE-2026-52968
KVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic kvm_s390_pci_aif_enable(), kvm_s390_pci_aif_disable(), and aen_host_forward() index the GAIT by manually multiplying the index with sizeof(struct zpci_gaite). Since aift->gait is already a struct zpci_gaite pointer, this double-scales the offset, accessing element aisb*16 instead of aisb. This causes out-of-bounds accesses when aisb >= 32 (with ZPCI_NR_DEVICES=512) Fix by removing the erroneous sizeof multiplication.
INFO
Published Date :
June 24, 2026, 5:17 p.m.
Last Modified :
July 18, 2026, 8:16 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Remove erroneous sizeof multiplication in GAIT indexing.
- Update the Linux kernel to the latest version.
- Apply the specific patch for KVM s390 PCI.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-52968.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-52968 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-52968
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-52968 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-52968 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 18, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H -
Initial Analysis by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H Added CWE CWE-125 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.141 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.91 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.33 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.10 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.0 up to (excluding) 6.1.175 Added Reference Type kernel.org: https://git.kernel.org/stable/c/11b8ff5b930b351dd1f6f088dce0beb027ac92d0 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/16d990a15491cf76cd6eef0846e1b4100e63261a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/31a9d9f9942885aae356a1a57c79e82c5b5b0828 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a99a25db131ece5e6c0f7632da606de631efe4f2 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b22a2da8792a7bfe743c1a922e77fa499ddedbe8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e7216651b94e92e5433fb2f54b77864642b4ea48 Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 24, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '73f91b004321f2510fa79e66035dbbf1870fcf56', 'lessThan': '31a9d9f9942885aae356a1a57c79e82c5b5b0828', 'versionType': 'git'}, {'status': 'affected', 'version': '73f91b004321f2510fa79e66035dbbf1870fcf56', 'lessThan': 'a99a25db131ece5e6c0f7632da606de631efe4f2', 'versionType': 'git'}, {'status': 'affected', 'version': '73f91b004321f2510fa79e66035dbbf1870fcf56', 'lessThan': '11b8ff5b930b351dd1f6f088dce0beb027ac92d0', 'versionType': 'git'}, {'status': 'affected', 'version': '73f91b004321f2510fa79e66035dbbf1870fcf56', 'lessThan': 'b22a2da8792a7bfe743c1a922e77fa499ddedbe8', 'versionType': 'git'}, {'status': 'affected', 'version': '73f91b004321f2510fa79e66035dbbf1870fcf56', 'lessThan': 'e7216651b94e92e5433fb2f54b77864642b4ea48', 'versionType': 'git'}, {'status': 'affected', 'version': '73f91b004321f2510fa79e66035dbbf1870fcf56', 'lessThan': '16d990a15491cf76cd6eef0846e1b4100e63261a', 'versionType': 'git'}], 'programFiles': ['arch/s390/kvm/interrupt.c', 'arch/s390/kvm/pci.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.0', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.141', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.91', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.33', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.10', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['arch/s390/kvm/interrupt.c', 'arch/s390/kvm/pci.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic kvm_s390_pci_aif_enable(), kvm_s390_pci_aif_disable(), and aen_host_forward() index the GAIT by manually multiplying the index with sizeof(struct zpci_gaite). Since aift->gait is already a struct zpci_gaite pointer, this double-scales the offset, accessing element aisb*16 instead of aisb. This causes out-of-bounds accesses when aisb >= 32 (with ZPCI_NR_DEVICES=512) Fix by removing the erroneous sizeof multiplication. Added Reference https://git.kernel.org/stable/c/11b8ff5b930b351dd1f6f088dce0beb027ac92d0 Added Reference https://git.kernel.org/stable/c/16d990a15491cf76cd6eef0846e1b4100e63261a Added Reference https://git.kernel.org/stable/c/31a9d9f9942885aae356a1a57c79e82c5b5b0828 Added Reference https://git.kernel.org/stable/c/a99a25db131ece5e6c0f7632da606de631efe4f2 Added Reference https://git.kernel.org/stable/c/b22a2da8792a7bfe743c1a922e77fa499ddedbe8 Added Reference https://git.kernel.org/stable/c/e7216651b94e92e5433fb2f54b77864642b4ea48