{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52994","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-06-09T07:44:35.377Z","datePublished":"2026-06-24T16:29:07.360Z","dateUpdated":"2026-06-24T16:29:07.360Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-24T16:29:07.360Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: fix MSG_ZEROCOPY pinned-pages accounting\n\nvirtio_transport_init_zcopy_skb() uses iter->count as the size argument\nfor msg_zerocopy_realloc(), which in turn passes it to\nmm_account_pinned_pages() for RLIMIT_MEMLOCK accounting. However, this\nfunction is called after virtio_transport_fill_skb() has already consumed\nthe iterator via __zerocopy_sg_from_iter(), so on the last skb, iter->count\nwill be 0, skipping the RLIMIT_MEMLOCK enforcement.\n\nPass pkt_len (the total bytes being sent) as an explicit parameter to\nvirtio_transport_init_zcopy_skb() instead of reading the already-consumed\niter->count.\n\nThis matches TCP and UDP, which both call msg_zerocopy_realloc() with\nthe original message size."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/vmw_vsock/virtio_transport_common.c"],"versions":[{"version":"581512a6dc939ef122e49336626ae159f3b8a345","lessThan":"6af1736b5810bc8a4a43a8518530113f5a757dc1","status":"affected","versionType":"git"},{"version":"581512a6dc939ef122e49336626ae159f3b8a345","lessThan":"d0117950075f0a9d5944980784c719d8ebcd4bff","status":"affected","versionType":"git"},{"version":"581512a6dc939ef122e49336626ae159f3b8a345","lessThan":"1cb36e252211506f51095fe7ced8286cc77b4c80","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/vmw_vsock/virtio_transport_common.c"],"versions":[{"version":"6.7","status":"affected"},{"version":"0","lessThan":"6.7","status":"unaffected","versionType":"semver"},{"version":"6.18.33","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.10","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/6af1736b5810bc8a4a43a8518530113f5a757dc1"},{"url":"https://git.kernel.org/stable/c/d0117950075f0a9d5944980784c719d8ebcd4bff"},{"url":"https://git.kernel.org/stable/c/1cb36e252211506f51095fe7ced8286cc77b4c80"}],"title":"vsock/virtio: fix MSG_ZEROCOPY pinned-pages accounting","x_generator":{"engine":"bippy-1.2.0"}}}}