CVE-2026-64318
partitions: aix: bound the pp_count scan to the ppe array
Description
In the Linux kernel, the following vulnerability has been resolved: partitions: aix: bound the pp_count scan to the ppe array aix_partition() reads the physical volume descriptor into a fixed-size struct pvd and then scans its physical-partition-extent array: int numpps = be16_to_cpu(pvd->pp_count); ... for (i = 0; i < numpps; i += 1) { struct ppe *p = pvd->ppe + i; ... lp_ix = be16_to_cpu(p->lp_ix); pvd points at a single kmalloc()'d struct pvd whose ppe[] member holds a fixed ARRAY_SIZE(pvd->ppe) (1016) entries, but the loop runs up to the on-disk pp_count. pp_count is an unvalidated __be16 read straight from the descriptor, so a crafted AIX image with pp_count larger than 1016 drives the loop to read pvd->ppe[i] past the end of the allocation (up to 65535 entries, ~2 MB out of bounds). The partition scan runs without mounting anything, when a block device with a crafted AIX/IBM partition table appears (an attacker-supplied image attached with losetup -P, or a device auto-scanned by udev), via msdos_partition() -> aix_partition(). Clamp the scan to the number of entries the ppe[] array can hold.
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
Aug. 17, 2026, 5:17 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 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel.
- Apply the vendor-supplied patch.
- Ensure partition scans respect array limits.
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-2026-64318.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64318 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-2026-64318
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-2026-64318 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64318 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
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '09861651617ba0fec089e8b9477439e68398c110', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '5eacdb1967378f5e5591cd27a2d8cdee2df1a599', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': 'b5e9c09309e18fd9839ad007c238120353ca0cc4', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': 'fd94a779020f2ecc8b2607f4c20b34acb1763b9a', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '4671bb74bba05fdd4acf670a35758c29e8c97b83', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': 'ce93228e2193a17d2c58b656e439bb39fe5c3af8', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '44f37ee92fdcd377c41bdf6a31cdd8cc7d4c410e', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '2dc0bfd2fe355fb930de63c2f2eb8ced8570c579', 'versionType': 'git'}], 'programFiles': ['block/partitions/aix.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.11'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.11', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['block/partitions/aix.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '09861651617ba0fec089e8b9477439e68398c110', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '5eacdb1967378f5e5591cd27a2d8cdee2df1a599', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': 'b5e9c09309e18fd9839ad007c238120353ca0cc4', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': 'fd94a779020f2ecc8b2607f4c20b34acb1763b9a', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '4671bb74bba05fdd4acf670a35758c29e8c97b83', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': 'ce93228e2193a17d2c58b656e439bb39fe5c3af8', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '44f37ee92fdcd377c41bdf6a31cdd8cc7d4c410e', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '2dc0bfd2fe355fb930de63c2f2eb8ced8570c579', 'versionType': 'git'}], 'programFiles': ['block/partitions/aix.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.11'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.11', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['block/partitions/aix.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 27, 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 -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 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': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '09861651617ba0fec089e8b9477439e68398c110', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '5eacdb1967378f5e5591cd27a2d8cdee2df1a599', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': 'b5e9c09309e18fd9839ad007c238120353ca0cc4', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': 'fd94a779020f2ecc8b2607f4c20b34acb1763b9a', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '4671bb74bba05fdd4acf670a35758c29e8c97b83', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': 'ce93228e2193a17d2c58b656e439bb39fe5c3af8', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '44f37ee92fdcd377c41bdf6a31cdd8cc7d4c410e', 'versionType': 'git'}, {'status': 'affected', 'version': '6ceea22bbbc84fcf6bf0913bb3db8a657e9002f6', 'lessThan': '2dc0bfd2fe355fb930de63c2f2eb8ced8570c579', 'versionType': 'git'}], 'programFiles': ['block/partitions/aix.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.11'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.11', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['block/partitions/aix.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: partitions: aix: bound the pp_count scan to the ppe array aix_partition() reads the physical volume descriptor into a fixed-size struct pvd and then scans its physical-partition-extent array: int numpps = be16_to_cpu(pvd->pp_count); ... for (i = 0; i < numpps; i += 1) { struct ppe *p = pvd->ppe + i; ... lp_ix = be16_to_cpu(p->lp_ix); pvd points at a single kmalloc()'d struct pvd whose ppe[] member holds a fixed ARRAY_SIZE(pvd->ppe) (1016) entries, but the loop runs up to the on-disk pp_count. pp_count is an unvalidated __be16 read straight from the descriptor, so a crafted AIX image with pp_count larger than 1016 drives the loop to read pvd->ppe[i] past the end of the allocation (up to 65535 entries, ~2 MB out of bounds). The partition scan runs without mounting anything, when a block device with a crafted AIX/IBM partition table appears (an attacker-supplied image attached with losetup -P, or a device auto-scanned by udev), via msdos_partition() -> aix_partition(). Clamp the scan to the number of entries the ppe[] array can hold. Added Reference https://git.kernel.org/stable/c/09861651617ba0fec089e8b9477439e68398c110 Added Reference https://git.kernel.org/stable/c/2dc0bfd2fe355fb930de63c2f2eb8ced8570c579 Added Reference https://git.kernel.org/stable/c/44f37ee92fdcd377c41bdf6a31cdd8cc7d4c410e Added Reference https://git.kernel.org/stable/c/4671bb74bba05fdd4acf670a35758c29e8c97b83 Added Reference https://git.kernel.org/stable/c/5eacdb1967378f5e5591cd27a2d8cdee2df1a599 Added Reference https://git.kernel.org/stable/c/b5e9c09309e18fd9839ad007c238120353ca0cc4 Added Reference https://git.kernel.org/stable/c/ce93228e2193a17d2c58b656e439bb39fe5c3af8 Added Reference https://git.kernel.org/stable/c/fd94a779020f2ecc8b2607f4c20b34acb1763b9a