CVE-2026-53236

In the Linux kernel, the following vulnerability has been resolved: tcp: restrict SO_ATTACH_FILTER to priv users This patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets to users with CAP_NET_ADMIN capability. This blocks potential side-channel attack where an unprivileged application attaches a filter to leak TCP sequence/acknowledgment numbers.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/3747de241a66ef2c7032d2cc2b826a47c5fa0f6a
https://git.kernel.org/stable/c/5d39580f68e6ddeedd15e587282207489dfb3da2
https://git.kernel.org/stable/c/82b3e7ce10c53fc12aab8904745603efc74f8c07
https://git.kernel.org/stable/c/c68517a3e18e20997808821c5559d0cba4d776c1
https://git.kernel.org/stable/c/ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba
https://git.kernel.org/stable/c/ede69b8f6670600e534591664584f810d7c385f9

Configurations

No configuration.

History

25 Jun 2026, 09:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-25 09:16

Updated : 2026-06-30 14:44

NVD link : CVE-2026-53236

Mitre link : CVE-2026-53236

CVE.ORG link : CVE-2026-53236

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-53236", "cveTags": [], "metrics": {}, "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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "3747de241a66ef2c7032d2cc2b826a47c5fa0f6a", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "82b3e7ce10c53fc12aab8904745603efc74f8c07", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ede69b8f6670600e534591664584f810d7c385f9", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c68517a3e18e20997808821c5559d0cba4d776c1", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "5d39580f68e6ddeedd15e587282207489dfb3da2", "versionType": "git"}], "programFiles": ["net/core/sock.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.12"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.12", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.176", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.143", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"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/core/sock.c"], "defaultStatus": "affected"}]}], "published": "2026-06-25T09:16:41.493", "references": [{"url": "https://git.kernel.org/stable/c/3747de241a66ef2c7032d2cc2b826a47c5fa0f6a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5d39580f68e6ddeedd15e587282207489dfb3da2", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/82b3e7ce10c53fc12aab8904745603efc74f8c07", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c68517a3e18e20997808821c5559d0cba4d776c1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ede69b8f6670600e534591664584f810d7c385f9", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Awaiting Analysis", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: restrict SO_ATTACH_FILTER to priv users\n\nThis patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets\nto users with CAP_NET_ADMIN capability.\n\nThis blocks potential side-channel attack where an unprivileged application\nattaches a filter to leak TCP sequence/acknowledgment numbers."}], "lastModified": "2026-06-30T14:44:27.313", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}