CVE-2026-46081

{"id": "CVE-2026-46081", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "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": "64929fe8c0a43508eee952cf57903a61c52601e7", "lessThan": "343a5bf68a8ff9affcf2b70677ea4cf40c195ee4", "versionType": "git"}, {"status": "affected", "version": "64929fe8c0a43508eee952cf57903a61c52601e7", "lessThan": "1a2785e5985627f2265ba7775949601a29ba0d1e", "versionType": "git"}, {"status": "affected", "version": "64929fe8c0a43508eee952cf57903a61c52601e7", "lessThan": "d7e20b9bd6c990773cf0c09e2642250b8a70263d", "versionType": "git"}], "programFiles": ["crypto/acompress.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"status": "unaffected", "version": "0", "lessThan": "6.16", "versionType": "semver"}, {"status": "unaffected", "version": "6.18.27", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.4", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["crypto/acompress.c"], "defaultStatus": "affected"}]}], "published": "2026-05-27T14:17:29.510", "references": [{"url": "https://git.kernel.org/stable/c/1a2785e5985627f2265ba7775949601a29ba0d1e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/343a5bf68a8ff9affcf2b70677ea4cf40c195ee4", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d7e20b9bd6c990773cf0c09e2642250b8a70263d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: acomp - fix wrong pointer stored by acomp_save_req()\n\nacomp_save_req() stores &req->chain in req->base.data. When\nacomp_reqchain_done() is invoked on asynchronous completion, it receives\n&req->chain as the data argument but casts it directly to struct\nacomp_req. Since data points to the chain member, all subsequent field\naccesses are at a wrong offset, resulting in memory corruption.\n\nThe issue occurs when an asynchronous hardware implementation, such as\nthe QAT driver, completes a request that uses the DMA virtual address\ninterface (e.g. acomp_request_set_src_dma()). This combination causes\ncrypto_acomp_compress() to enter the acomp_do_req_chain() path, which\nsets acomp_reqchain_done() as the completion callback via\nacomp_save_req().\n\nWith KASAN enabled, this manifests as a general protection fault in\nacomp_reqchain_done():\n\n general protection fault, probably for non-canonical address 0xe000040000000000\n KASAN: probably user-memory-access in range [0x0000400000000000-0x0000400000000007]\n RIP: 0010:acomp_reqchain_done+0x15b/0x4e0\n Call Trace:\n <IRQ>\n qat_comp_alg_callback+0x5d/0xa0 [intel_qat]\n adf_ring_response_handler+0x376/0x8b0 [intel_qat]\n adf_response_handler+0x60/0x170 [intel_qat]\n tasklet_action_common+0x223/0x820\n handle_softirqs+0x1ab/0x640\n </IRQ>\n\nFix this by storing the request itself in req->base.data instead of\n&req->chain, so that acomp_reqchain_done() receives the correct pointer.\nSimplify acomp_restore_req() accordingly to access req->chain directly."}], "lastModified": "2026-06-24T17:20:20.110", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "24BD5AA7-843C-41A3-8471-F53AD6DB7C6B", "versionEndExcluding": "6.18.27", "versionStartIncluding": "6.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CDB78D6D-22C3-4154-B0D0-94AF1CE5C2E3", "versionEndExcluding": "7.0.4", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}