{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64522", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.794Z", "datePublished": "2026-07-25T09:14:47.404Z", "dateUpdated": "2026-07-27T05:01:38.188Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-27T05:01:38.188Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA\n\nmlx5e_xfrm_add_state() handles acquire-flow temporary SAs by allocating\nsoftware state and skipping hardware offload setup.\n\nThat path jumps to the common success label before taking the eswitch mode\nblock. After tunnel-mode validation was moved earlier, the common success\nlabel unconditionally calls mlx5_eswitch_unblock_mode(). For acquire SAs,\nthis decrements esw->offloads.num_block_mode without a matching increment.\n\nReturn directly after installing the acquire SA offload handle, so only the\npaths that successfully called mlx5_eswitch_block_mode() call the matching\nunblock."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c"], "versions": [{"version": "22239eb258bc1e6ccdb2d3502fce1cc2b2a88386", "lessThan": "b5bd4249e430f5963d559708ee96a671716d2400", "status": "affected", "versionType": "git"}, {"version": "22239eb258bc1e6ccdb2d3502fce1cc2b2a88386", "lessThan": "ecafd8284e527666e83261e6e57a7c7341d591cb", "status": "affected", "versionType": "git"}, {"version": "22239eb258bc1e6ccdb2d3502fce1cc2b2a88386", "lessThan": "abe003b33223ff33552f291644bf35d9c2f992fb", "status": "affected", "versionType": "git"}, {"version": "993c4ba71596c30418ba5a0ddcf4f9c2f431466a", "status": "affected", "versionType": "git"}, {"version": "6.17.4", "lessThan": "6.18", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "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": "6.18", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17.4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b5bd4249e430f5963d559708ee96a671716d2400"}, {"url": "https://git.kernel.org/stable/c/ecafd8284e527666e83261e6e57a7c7341d591cb"}, {"url": "https://git.kernel.org/stable/c/abe003b33223ff33552f291644bf35d9c2f992fb"}], "title": "net/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

{"bugzilla": {"description": "kernel: net/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA", "id": "2507164", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507164"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-191", "details": ["A flaw was found in the Linux kernel's mlx5e network driver. When handling temporary Security Associations (SAs) for IPsec, the `mlx5e_xfrm_add_state()` function incorrectly decrements a counter without a corresponding increment. This underflow in the eswitch mode block mechanism can lead to a denial of service, potentially disrupting network operations."], "name": "CVE-2026-64522", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64522\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64522\nhttps://lore.kernel.org/linux-cve-announce/2026072538-CVE-2026-64522-eb28@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[22239eb258bc1e6ccdb2d3502fce1cc2b2a88386,b5bd4249e430f5963d559708ee96a671716d2400)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[22239eb258bc1e6ccdb2d3502fce1cc2b2a88386,ecafd8284e527666e83261e6e57a7c7341d591cb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[22239eb258bc1e6ccdb2d3502fce1cc2b2a88386,abe003b33223ff33552f291644bf35d9c2f992fb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "993c4ba71596c30418ba5a0ddcf4f9c2f431466a"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.17.4,6.18)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.34,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.11,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-25T23:15:03.235602+00:00", "updated": "2026-07-27T05:00:04.769548+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-399"]}