nfc: llcp: Fix use-after-free race in nfc_llcp_recv_cc()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64010
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:40 UTC
Updated2026-07-20 15:17:02 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: nfc: llcp: Fix use-after-free race in nfc_llcp_recv_cc() A race condition exists in the NFC LLCP connection state machine where the connection acceptance packet (CC) can be processed concurrently with socket release. This can lead to a use-after-free of the socket object. When nfc_llcp_recv_cc() moves the socket from the connecting_sockets list to the sockets list, it does so without holding the socket lock. If llcp_sock_release() is executing concurrently, it might have already unlinked the socket and dropped its references, which can result in nfc_llcp_recv_cc() linking a freed socket into the live list. Fix this by holding lock_sock() during the state transition and list movement in nfc_llcp_recv_cc(). After acquiring the lock, check if the socket is still hashed to ensure it hasn't already been unlinked and marked for destruction by the release path. This aligns the locking pattern with recv_hdlc() and recv_disc().

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001760000 probability, percentile 0.073890000 (date 2026-07-20)

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

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a69f32af86e389dd232b1bb2269e202c1bfcc60f dce85215a6c7b0fd753f577a4c487f647119884c git Not specified
CNA Linux Linux affected a69f32af86e389dd232b1bb2269e202c1bfcc60f bd08bb7443c501d2f2a71d529e4afcf11c9b07d2 git Not specified
CNA Linux Linux affected a69f32af86e389dd232b1bb2269e202c1bfcc60f 0b45c31746e1523d5d482fda8fcf54a35ac417f1 git Not specified
CNA Linux Linux affected a69f32af86e389dd232b1bb2269e202c1bfcc60f ee2d1a8a1833c5e56e9a1745e64b0b4edda732c2 git Not specified
CNA Linux Linux affected a69f32af86e389dd232b1bb2269e202c1bfcc60f ad8a27d63cac96bac441edd002209ebd996e12fb git Not specified
CNA Linux Linux affected a69f32af86e389dd232b1bb2269e202c1bfcc60f 650bdd8fdfab64a09ee474150313dbc48c374795 git Not specified
CNA Linux Linux affected a69f32af86e389dd232b1bb2269e202c1bfcc60f b2a60f7f846faaf5c2cdad4ea6d3a33e5f863183 git Not specified
CNA Linux Linux affected a69f32af86e389dd232b1bb2269e202c1bfcc60f b493ea2765cc17cb8aa7e7544a4b6dcb05b6ed77 git Not specified
CNA Linux Linux affected 3.6 Not specified
CNA Linux Linux unaffected 3.6 semver Not specified
CNA Linux Linux unaffected 5.10.259 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.210 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.176 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.93 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.35 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.12 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/dce85215a6c7b0fd753f577a4c487f647119884c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ee2d1a8a1833c5e56e9a1745e64b0b4edda732c2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b2a60f7f846faaf5c2cdad4ea6d3a33e5f863183 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b493ea2765cc17cb8aa7e7544a4b6dcb05b6ed77 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bd08bb7443c501d2f2a71d529e4afcf11c9b07d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0b45c31746e1523d5d482fda8fcf54a35ac417f1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ad8a27d63cac96bac441edd002209ebd996e12fb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/650bdd8fdfab64a09ee474150313dbc48c374795 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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