CVE-2026-93811
N/AIn the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix acl.sd_buf memory leak and invalid sd_size error handling 1. When ndr_decode_v4_ntacl() fails, the code jumped to free_n_data which only freed n.data, skipping kfree(acl.sd_buf) and leaking the buffer. Zero-initialize struct xattr_ntacl acl, reorder error labels to out_free to release acl.sd_buf on all error paths. 2. if (acl.sd_size < sizeof(struct smb_ntsd)) is true, original code returned success without freeing sd_buf and left stale *pntsd. Set rc = -EINVAL before jumping to out_free to return error code and free buffer.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.2%chance of exploitation in 30 days · 7th percentile
Impact if exploited
—CVSS · not scored
- No impact metrics
Proof of concept
No public PoC is currently catalogued.
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References and research data (JSON)
Vendor product assessments
Showing 32 of 277 vendor product statements; 245 omitted. Read the full vendor advisory.
kernel as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel
- none available: Fix deferred
kernel-64k-debug-devel as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-64k-debug-devel
- none available: Fix deferred
kernel-64k-devel as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-64k-devel
- none available: Fix deferred
kernel-abi-stablelists as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-abi-stablelists
- none available: Fix deferred
kernel-debug-devel-matched as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-debug-devel-matched
- none available: Fix deferred
kernel-devel as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-devel
- none available: Fix deferred
kernel-modules-extra as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-modules-extra
- none available: Fix deferred
kernel-rt-64k-core as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-rt-64k-core
- none available: Fix deferred
kernel-rt-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-rt-64k-debug-modules-extra
- none available: Fix deferred
kernel-rt-core as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-rt-core
- none available: Fix deferred
kernel-rt-debug-modules as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-rt-debug-modules
- none available: Fix deferred
kernel-rt-modules as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-rt-modules
- none available: Fix deferred
kernel-tools-libs-devel as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-tools-libs-devel
- none available: Fix deferred
kernel-zfcpdump-devel as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-zfcpdump-devel
- none available: Fix deferred
kernel.src as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel?arch=src
- none available: Fix deferred
rv as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/rv
- none available: Fix deferred
kernel as a component of Red Hat Enterprise Linux 6 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00python-perf as a component of Red Hat Enterprise Linux 6 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/python-perf
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 7 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-rt-debug-devel
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00perf as a component of Red Hat Enterprise Linux 7 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/perf
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00kernel-debug-modules-internal as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-debug-modules-internal
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-rt-debug-kvm
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00kernel-tools-libs-devel as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-tools-libs-devel
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00kernel-64k-core as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-64k-core
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00kernel-64k-modules-core as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-64k-modules-core
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00kernel-debug-modules-extra as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-debug-modules-extra
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00kernel-modules-partner as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-modules-partner
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00kernel-rt-64k-debug-modules-partner as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-rt-64k-debug-modules-partner
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00kernel-rt-debug-devel-matched as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-rt-debug-devel-matched
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00kernel-rt-modules-internal as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-rt-modules-internal
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00kernel-zfcpdump-modules as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-zfcpdump-modules
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:oci/ose-rhel-coreos-9?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-9
Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00
References
Advisories
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93811.json Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-86198 EUVD · EUVD-2026-86198
Technical & other
- https://git.kernel.org/stable/c/f46a70a082bdbfecbe074af8a719c26c4deb58c6CVE record · Linux · Updated 2026-10-03T10:57:43.607Z
NVD · CVE-2026-93811 · Updated 2026-10-03T11:17:50.870 - https://git.kernel.org/stable/c/86c2625fb9863139b359805fc6be1e31edbd3d65CVE record · Linux · Updated 2026-10-03T10:57:43.607Z
NVD · CVE-2026-93811 · Updated 2026-10-03T11:17:50.870 - https://git.kernel.org/stable/c/edc17db83085624a2b1bacf6a4521d7f15571737CVE record · Linux · Updated 2026-10-03T10:57:43.607Z
NVD · CVE-2026-93811 · Updated 2026-10-03T11:17:50.870 - https://git.kernel.org/stable/c/c3836f55e0dab96314774215e12d87f63fa919f2CVE record · Linux · Updated 2026-10-03T10:57:43.607Z
NVD · CVE-2026-93811 · Updated 2026-10-03T11:17:50.870 - https://git.kernel.org/stable/c/6e6329322ad733c5b23555c609353841560b26bcCVE record · Linux · Updated 2026-10-03T10:57:43.607Z
NVD · CVE-2026-93811 · Updated 2026-10-03T11:17:50.870 - https://git.kernel.org/stable/c/d708a36634bb7b6f94d0e76d587d2ec50b2b93b5CVE record · Linux · Updated 2026-10-03T10:57:43.607Z
NVD · CVE-2026-93811 · Updated 2026-10-03T11:17:50.870 - https://access.redhat.com/security/cve/CVE-2026-93811 Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00
- https://bugzilla.redhat.com/show_bug.cgi?id=2540558 Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00
- https://www.cve.org/CVERecord?id=CVE-2026-93811 Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00
- https://nvd.nist.gov/vuln/detail/CVE-2026-93811 Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00
- https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93811.mbox Red Hat · CVE-2026-93811 · Updated 2026-10-06T17:33:52+00:00