CVE-2026-53132

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix potential unbounded skb queue virtio_transport_inc_rx_pkt() checks vvs->rx_bytes + len > vvs->buf_alloc. virtio_transport_recv_enqueue() skips coalescing for packets with VIRTIO_VSOCK_SEQ_EOM. If fed with packets with len == 0 and VIRTIO_VSOCK_SEQ_EOM, a very large number of packets can be queued because vvs->rx_bytes stays at 0. Fix this by estimating the skb metadata size: (Number of skbs in the queue) * SKB_TRUESIZE(0)

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.5 / Impact : 4.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://git.kernel.org/stable/c/059b7dbd20a6f0c539a45ddff1573cb8946685b5	Patch
https://git.kernel.org/stable/c/100d5b2ffdc6468b9e48532641f29e83efdcb63c	Patch
https://git.kernel.org/stable/c/1eca304f97a34ed5e921e1f0e06c8b241f25bf12	Patch
https://git.kernel.org/stable/c/9bdc637fde66b63d6cad0caacd034888bb7bf5f5	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.3:-::::::
	cpe:2.3:o:linux:linux_kernel:6.3:rc3::::::
	cpe:2.3:o:linux:linux_kernel:6.3:rc4::::::
	cpe:2.3:o:linux:linux_kernel:6.3:rc5::::::
	cpe:2.3:o:linux:linux_kernel:6.3:rc6::::::
	cpe:2.3:o:linux:linux_kernel:6.3:rc7::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc1::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc2::::::

History

No history.

Information

Published : 2026-06-25 09:16

Updated : 2026-07-06 15:23

NVD link : CVE-2026-53132

Mitre link : CVE-2026-53132

CVE.ORG link : CVE-2026-53132

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

{"id": "CVE-2026-53132", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 2.5}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "077706165717686a2a6a71405fef036cd5b37ae0", "lessThan": "1eca304f97a34ed5e921e1f0e06c8b241f25bf12", "versionType": "git"}, {"status": "affected", "version": "077706165717686a2a6a71405fef036cd5b37ae0", "lessThan": "9bdc637fde66b63d6cad0caacd034888bb7bf5f5", "versionType": "git"}, {"status": "affected", "version": "077706165717686a2a6a71405fef036cd5b37ae0", "lessThan": "100d5b2ffdc6468b9e48532641f29e83efdcb63c", "versionType": "git"}, {"status": "affected", "version": "077706165717686a2a6a71405fef036cd5b37ae0", "lessThan": "059b7dbd20a6f0c539a45ddff1573cb8946685b5", "versionType": "git"}, {"status": "affected", "version": "5852a2b573f7a3a29df46296e56aa3491e589cdf", "versionType": "git"}, {"status": "affected", "version": "6.1.63", "lessThan": "6.2", "versionType": "semver"}], "programFiles": ["net/vmw_vsock/virtio_transport_common.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"status": "unaffected", "version": "0", "lessThan": "6.3", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.94", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.36", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.13", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/vmw_vsock/virtio_transport_common.c"], "defaultStatus": "affected"}]}], "published": "2026-06-25T09:16:30.437", "references": [{"url": "https://git.kernel.org/stable/c/059b7dbd20a6f0c539a45ddff1573cb8946685b5", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/100d5b2ffdc6468b9e48532641f29e83efdcb63c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1eca304f97a34ed5e921e1f0e06c8b241f25bf12", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9bdc637fde66b63d6cad0caacd034888bb7bf5f5", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-401"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: fix potential unbounded skb queue\n\nvirtio_transport_inc_rx_pkt() checks vvs->rx_bytes + len > vvs->buf_alloc.\n\nvirtio_transport_recv_enqueue() skips coalescing for packets\nwith VIRTIO_VSOCK_SEQ_EOM.\n\nIf fed with packets with len == 0 and VIRTIO_VSOCK_SEQ_EOM,\na very large number of packets can be queued\nbecause vvs->rx_bytes stays at 0.\n\nFix this by estimating the skb metadata size:\n\n\t(Number of skbs in the queue) * SKB_TRUESIZE(0)"}], "lastModified": "2026-07-06T15:23:07.123", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C1939E82-B0E6-4502-A05A-A40B2F7C52C6", "versionEndExcluding": "6.2", "versionStartIncluding": "6.1.63"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7B35CFAA-A1B5-4F4C-A025-C4C143C2558C", "versionEndExcluding": "6.12.94", "versionStartIncluding": "6.3.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "389025D2-958D-41BD-BD96-70ED1033A9F3", "versionEndExcluding": "6.18.36", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6A64BF9F-3BCA-42FD-98CB-8F03474D2B1E", "versionEndExcluding": "7.0.13", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "21D6F467-B848-453E-B1A4-BEF940E413A6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3583026A-27EC-4A4C-850A-83F2AF970673"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DC271202-7570-4505-89A4-D602D47BFD00"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D413BB6D-4F74-4C7D-9163-47786619EF53"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F4D613FB-9976-4989-8C4A-567773373CEA"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1240A34-749A-49F5-B8DD-C09441AD2228"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}