nfc: pn533: hold a reference to the request skb during send_frame

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-90222
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:17 UTC
Updated2026-09-17 17:17:17 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: nfc: pn533: hold a reference to the request skb during send_frame __pn533_send_async() publishes the command and then calls dev->phy_ops->send_frame(). Once dev->cmd is set, an incoming frame can be matched to this command: the I2C threaded IRQ runs pn533_recv_frame(), which queues cmd_complete_work, and pn533_send_async_complete() frees cmd->req with consume_skb(). On the I2C transport, pn533_i2c_send_frame() still dereferences the same skb after i2c_master_send() returns, so a completion that races the send can free the skb while the transport is still using it. The request skb is owned by the command object and may be freed by command completion at any time after dev->cmd is published, so the transport send path must not assume it stays alive. Hold a temporary reference to the request skb across the send_frame() call so the transport always sees a live skb even if completion races the send. Add a pn533_send_cmd_frame() helper and use it from all three send paths.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc 8710faddef4ad8b2a6bfa985d896e2e1bfb77018 git Not specified
CNA Linux Linux affected 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc 19f1239758c23f087f4c25733cfcf62bf0b06051 git Not specified
CNA Linux Linux affected 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc 7ee72c64b4b66b1b42dbddbca0a80a218f1b9297 git Not specified
CNA Linux Linux affected 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc 753bdaf3220fe8371a6c3c75da645ea7753d11be git Not specified
CNA Linux Linux affected 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc d329f61ad5786900334a54c2445dc99feda545bf git Not specified
CNA Linux Linux affected 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc 7a8e0a7aef80721da287ac246349aba7d98f6aed git Not specified
CNA Linux Linux affected 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc 3e7a093c177f9f8b9fd039cab41191515079425a git Not specified
CNA Linux Linux affected 9815c7cf22daceabfb919ddcd6f2c80e049c1fbc 47792358a624ea066455ef86b744159928cd7716 git Not specified
CNA Linux Linux affected 4.7 Not specified
CNA Linux Linux unaffected 4.7 semver Not specified
CNA Linux Linux unaffected 5.10.270 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/753bdaf3220fe8371a6c3c75da645ea7753d11be 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7ee72c64b4b66b1b42dbddbca0a80a218f1b9297 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7a8e0a7aef80721da287ac246349aba7d98f6aed 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8710faddef4ad8b2a6bfa985d896e2e1bfb77018 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/19f1239758c23f087f4c25733cfcf62bf0b06051 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/47792358a624ea066455ef86b744159928cd7716 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d329f61ad5786900334a54c2445dc99feda545bf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3e7a093c177f9f8b9fd039cab41191515079425a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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