tee: shm: fix shm leak in register_shm_helper()

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Summary

CVECVE-2026-53210
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-25 09:16:38 UTC
Updated2026-06-25 09:16:38 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: tee: shm: fix shm leak in register_shm_helper() register_shm_helper() allocates shm before calling iov_iter_npages(). If iov_iter_npages() returns 0, the function jumps to err_ctx_put and leaks shm. This can be triggered by TEE_IOC_SHM_REGISTER with struct tee_ioctl_shm_register_data where length is 0. Jump to err_free_shm instead.

Risk And Classification

EPSS: 0.001750000 probability, percentile 0.072050000 (date 2026-06-25)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7bdee41575919773818e525ea19e54eb817770af 4277759906b44d923a38c8f59f5576501b187b0d git Not specified
CNA Linux Linux affected 7bdee41575919773818e525ea19e54eb817770af c10c9c48b2903f41ed4c532043b0576e86228236 git Not specified
CNA Linux Linux affected 7bdee41575919773818e525ea19e54eb817770af dbf779db927414f5b37c1f666013e9b48a88cfde git Not specified
CNA Linux Linux affected 7bdee41575919773818e525ea19e54eb817770af 26682f5efc276e3ad96d102019472bfbf03833b2 git Not specified
CNA Linux Linux affected 6.8 Not specified
CNA Linux Linux unaffected 6.8 semver Not specified
CNA Linux Linux unaffected 6.12.94 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/26682f5efc276e3ad96d102019472bfbf03833b2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4277759906b44d923a38c8f59f5576501b187b0d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dbf779db927414f5b37c1f666013e9b48a88cfde 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c10c9c48b2903f41ed4c532043b0576e86228236 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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