{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-64118", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.035Z", "datePublished": "2026-07-19T15:40:17.643Z", "dateUpdated": "2026-08-05T12:39:27.598Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:39:27.598Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nqed: fix double free in qed_cxt_tables_alloc()\n\nIf one of the later PF or VF CID bitmap allocations fails,\nqed_cid_map_alloc() jumps to cid_map_fail and frees the previously\nallocated CID bitmaps before returning an error. qed_cxt_tables_alloc()\nthen calls qed_cxt_mngr_free(), which invokes qed_cid_map_free()\nagain.\n\nFix this by setting each CID bitmap pointer to NULL after bitmap_free()\nto avoid double free.\n\nThe bug was first flagged by an experimental analysis tool we are\ndeveloping for kernel memory-management bugs while analyzing\nv6.13-rc1. The tool is still under development and is not yet publicly\navailable. Manual inspection confirms that the bug is still\npresent in v7.1-rc3.\n\nRuntime reproduction was not attempted because exercising the failing\nallocation path requires device-specific setup." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable code runs only during PF driver resource initialization (probe or firmware-initiated recovery), reached via local kernel driver bring-up paths rather than network packet processing or remote protocol handlers.\nAC:L - An attacker who can influence system memory pressure (e.g., via local memory exhaustion) can reliably force `bitmap_zalloc()` failures during the multi-step CID bitmap allocation loop, and can also time this with firmware recovery reprobes that re-enter `qed_resc_alloc()`.\nPR:N - No local account or capability is strictly required if a remote attacker can induce firmware process-kill recovery on an internet-facing QED host, causing automatic re-execution of `qed_resc_alloc()` where post-incident memory pressure can trigger the failing allocation path.\nUI:N - Exploitation does not require any victim user action such as opening files or mounting filesystems; driver recovery and re-allocation occur automatically in kernel context once the error/recovery conditions are met.\nS:U - Impact is confined to kernel heap corruption and potential privilege escalation within the same kernel security boundary, not a cross-authority escape such as VM breakout or IOMMU bypass.\nC:H - A double-free of kmalloc-allocated CID bitmap objects corrupts the kernel slab allocator state, which is classically leverageable for arbitrary kernel memory disclosure through heap manipulation primitives.\nI:H - Slab double-free is a standard heap corruption primitive that can be developed into arbitrary kernel writes and control-flow hijacking, not merely a bounded or cosmetic modification.\nA:H - Double-free during driver initialization can cause immediate kernel oops/panic from allocator corruption, and repeated recovery attempts on production QED hardware can produce sustained denial of service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/qlogic/qed/qed_cxt.c" ], "versions": [ { "version": "fe56b9e6a8d957d6a20729d626027f800c17a2da", "lessThan": "9fe030719bd083b766602692ee96c8c985798e3c", "status": "affected", "versionType": "git" }, { "version": "fe56b9e6a8d957d6a20729d626027f800c17a2da", "lessThan": "06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227", "status": "affected", "versionType": "git" }, { "version": "fe56b9e6a8d957d6a20729d626027f800c17a2da", "lessThan": "8cf5e4d2ca6b101d163c7423a426fb0aec34f7bb", "status": "affected", "versionType": "git" }, { "version": "fe56b9e6a8d957d6a20729d626027f800c17a2da", "lessThan": "3904b993cc17ec5d7c5d3b57dbd0b775dafb9684", "status": "affected", "versionType": "git" }, { "version": "fe56b9e6a8d957d6a20729d626027f800c17a2da", "lessThan": "bdf678a273cadbccc347f331ae2e93ff4d14834c", "status": "affected", "versionType": "git" }, { "version": "fe56b9e6a8d957d6a20729d626027f800c17a2da", "lessThan": "0e47fc1c9181ae029e0e35a865cbf2adcbae626c", "status": "affected", "versionType": "git" }, { "version": "fe56b9e6a8d957d6a20729d626027f800c17a2da", "lessThan": "a04c207f0801abdd23a169b5f902a9845059a65a", "status": "affected", "versionType": "git" }, { "version": "fe56b9e6a8d957d6a20729d626027f800c17a2da", "lessThan": "2bccfb8476ca5f3548afbd623dc7a6980d4e77de", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/qlogic/qed/qed_cxt.c" ], "versions": [ { "version": "4.4", "status": "affected" }, { "version": "0", "lessThan": "4.4", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.92", "lessThanOrEqual": "6.12.*", "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": "4.4", "versionEndExcluding": "5.10.259" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "5.15.210" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.6.142" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.12.92" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.18.34" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "7.0.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9fe030719bd083b766602692ee96c8c985798e3c" }, { "url": "https://git.kernel.org/stable/c/06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227" }, { "url": "https://git.kernel.org/stable/c/8cf5e4d2ca6b101d163c7423a426fb0aec34f7bb" }, { "url": "https://git.kernel.org/stable/c/3904b993cc17ec5d7c5d3b57dbd0b775dafb9684" }, { "url": "https://git.kernel.org/stable/c/bdf678a273cadbccc347f331ae2e93ff4d14834c" }, { "url": "https://git.kernel.org/stable/c/0e47fc1c9181ae029e0e35a865cbf2adcbae626c" }, { "url": "https://git.kernel.org/stable/c/a04c207f0801abdd23a169b5f902a9845059a65a" }, { "url": "https://git.kernel.org/stable/c/2bccfb8476ca5f3548afbd623dc7a6980d4e77de" } ], "title": "qed: fix double free in qed_cxt_tables_alloc()", "x_generator": { "engine": "bippy-1.2.0" } } } }