{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46081","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-13T15:03:33.096Z","datePublished":"2026-05-27T12:58:19.498Z","dateUpdated":"2026-06-14T17:52:55.892Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-14T17:52:55.892Z"},"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."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["crypto/acompress.c"],"versions":[{"version":"64929fe8c0a43508eee952cf57903a61c52601e7","lessThan":"343a5bf68a8ff9affcf2b70677ea4cf40c195ee4","status":"affected","versionType":"git"},{"version":"64929fe8c0a43508eee952cf57903a61c52601e7","lessThan":"1a2785e5985627f2265ba7775949601a29ba0d1e","status":"affected","versionType":"git"},{"version":"64929fe8c0a43508eee952cf57903a61c52601e7","lessThan":"d7e20b9bd6c990773cf0c09e2642250b8a70263d","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["crypto/acompress.c"],"versions":[{"version":"6.16","status":"affected"},{"version":"0","lessThan":"6.16","status":"unaffected","versionType":"semver"},{"version":"6.18.27","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.4","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":"6.16","versionEndExcluding":"6.18.27"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.0.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/343a5bf68a8ff9affcf2b70677ea4cf40c195ee4"},{"url":"https://git.kernel.org/stable/c/1a2785e5985627f2265ba7775949601a29ba0d1e"},{"url":"https://git.kernel.org/stable/c/d7e20b9bd6c990773cf0c09e2642250b8a70263d"}],"title":"crypto: acomp - fix wrong pointer stored by acomp_save_req()","x_generator":{"engine":"bippy-1.2.0"}}}}