staging: nvec: fix use-after-free in nvec_rx_completed()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72489
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:23 UTC
Updated2026-08-17 06:19:17 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: staging: nvec: fix use-after-free in nvec_rx_completed() In nvec_rx_completed(), when an incomplete RX transfer is detected, nvec_msg_free() is called to return the message back to the pool by clearing its 'used' atomic flag. Immediately after this, the code accesses nvec->rx->data[0] to check the message type. Since nvec_msg_free() marks the pool slot as available via atomic_set(), any concurrent or subsequent call to nvec_msg_alloc() could claim that same slot and overwrite its data[] array. Reading nvec->rx->data[0] after freeing the message is therefore a use-after-free. Fix this by saving the message type byte before calling nvec_msg_free(), then using the saved value for the battery quirk check.

Risk And Classification

Primary CVSS: v3.1 8.4 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001500000 probability, percentile 0.046750000 (date 2026-08-17)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.4HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.4HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d6bdcf2e1019351cbc176e963b7756766bdd8721 6b2ea886ebdae44a2394029844a4e78f58e1587d git Not specified
CNA Linux Linux affected d6bdcf2e1019351cbc176e963b7756766bdd8721 a37625c7b688fcf68a54263528eccbabfd7fa17a git Not specified
CNA Linux Linux affected d6bdcf2e1019351cbc176e963b7756766bdd8721 9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89 git Not specified
CNA Linux Linux affected d6bdcf2e1019351cbc176e963b7756766bdd8721 08626fcfe12308ca3f8b22c538ba7dee0b2dce7a git Not specified
CNA Linux Linux affected d6bdcf2e1019351cbc176e963b7756766bdd8721 f19a5bc059051143c489dd6f79a0f9c3bfd13aea git Not specified
CNA Linux Linux affected d6bdcf2e1019351cbc176e963b7756766bdd8721 bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90 git Not specified
CNA Linux Linux affected d6bdcf2e1019351cbc176e963b7756766bdd8721 5de04caa46b635e180cecbd164e333eca535db94 git Not specified
CNA Linux Linux affected d6bdcf2e1019351cbc176e963b7756766bdd8721 26813881181deb3a32fbb59eadb2599cbe8423f6 git Not specified
CNA Linux Linux affected 3.2 Not specified
CNA Linux Linux unaffected 3.2 semver Not specified
CNA Linux Linux unaffected 5.10.261 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.212 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/26813881181deb3a32fbb59eadb2599cbe8423f6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9f7fe4165a1f1014bdadc8e744c0fd3c2d8c0b89 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f19a5bc059051143c489dd6f79a0f9c3bfd13aea 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a37625c7b688fcf68a54263528eccbabfd7fa17a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bb3d592c7d6c4ec8ac6640c690ca13298e7e8e90 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6b2ea886ebdae44a2394029844a4e78f58e1587d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5de04caa46b635e180cecbd164e333eca535db94 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/08626fcfe12308ca3f8b22c538ba7dee0b2dce7a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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