{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-72045", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.902Z", "datePublished": "2026-08-15T05:52:04.038Z", "dateUpdated": "2026-08-23T12:46:33.156Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-23T12:46:33.156Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-af: cn10k: restrict VF LMTLINE sharing to its own PF\n\nrvu_mbox_handler_lmtst_tbl_setup() uses req->base_pcifunc as a direct\nindex into the LMT map table to read another function's LMTLINE\nphysical base address and copy it into the caller's own LMT map table\nentry. The mailbox dispatcher authenticates req->hdr.pcifunc from the\nIRQ source, but req->base_pcifunc is a separate payload field and is\nnot sanitized.\n\nReject the request with -EPERM when a VF caller's base_pcifunc is not a\nvalid function under its own PF. is_pf_func_valid() bounds the FUNC field\nto the PF's configured VF count, keeping the computed index inside the\ncaller's own slot block." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - Exploitation requires local control of an assigned Marvell CN10K/OCTEONTX2 SR-IOV VF and sending a crafted LMTST_TBL_SETUP mailbox message over the PCI VF→AF control path (rvu_afvf_mbox_handler→rvu_mbox_handler_lmtst_tbl_setup); it is not reachable via remote packet delivery.\nAC:L - Once a VF is assigned, the attacker fully controls the unsanitized base_pcifunc payload field and can trigger the flaw deterministically with a single mailbox message; no race, special memory layout, or victim timing is required.\nPR:L - Only control of an assigned VF is needed (typical cloud/tenant VM or container with SR-IOV passthrough, or guest root/CAP_NET_ADMIN managing the VF); host init-namespace root is not required and unprivileged host users cannot reach this hardware mailbox without the VF device.\nUI:N - No victim user action is required; the attacker directly sends the malicious LMTST_TBL_SETUP mailbox request from their VF to the AF handler.\nS:C - A malicious VF tenant can retarget hardware LMTLINE stores to another PF/VF's memory region, crossing the SR-IOV tenant isolation boundary and enabling guest-to-host or guest-to-guest impact on shared CN10K NIC deployments.\nC:H - Redirecting a VF's LMT map entry to another function's LMTLINE region lets the attacker read victim in-flight packet/crypto submission metadata and buffer pointers from shared hardware LMT memory, constituting cross-tenant information disclosure beyond the attacker's scope.\nI:H - After the map-table redirect, the attacker's LMTST flush operations (packet TX SQE submission, NPA aura free, CPT enqueue) are hardware-written into the victim's LMTLINE physical pages, enabling arbitrary cross-tenant memory corruption and potential control of victim I/O submission state.\nA:H - Corrupting another PF/VF's LMTLINE submission buffers can crash or hang the victim's networking/crypto stack (guest kernel oops/panic or persistent TX failure) and the attack can be repeated on demand by resending mailbox requests." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/marvell/octeontx2/af/rvu_cn10k.c" ], "versions": [ { "version": "893ae97214c385be02f8ec097298cc48c7f0d905", "lessThan": "04c014e49b9f53d58a8f94adece8a0af3ae1b85c", "status": "affected", "versionType": "git" }, { "version": "893ae97214c385be02f8ec097298cc48c7f0d905", "lessThan": "6967dd944be2a71eddab3a2ae1a1a4dd9e5f8eed", "status": "affected", "versionType": "git" }, { "version": "893ae97214c385be02f8ec097298cc48c7f0d905", "lessThan": "e9c5b03208507dd6d58b0c23a2c60b5c2f4c1b11", "status": "affected", "versionType": "git" }, { "version": "893ae97214c385be02f8ec097298cc48c7f0d905", "lessThan": "54535692bec9ef464adc714108eb19e49e38b5a2", "status": "affected", "versionType": "git" }, { "version": "893ae97214c385be02f8ec097298cc48c7f0d905", "lessThan": "c73b8795b45f4ad5a95120d2e9b435ea4616e08e", "status": "affected", "versionType": "git" }, { "version": "893ae97214c385be02f8ec097298cc48c7f0d905", "lessThan": "59da37fee81a8d76079313348ca13c5bc90dd6ae", "status": "affected", "versionType": "git" }, { "version": "893ae97214c385be02f8ec097298cc48c7f0d905", "lessThan": "8cdcf3d2caacdee7ddd363705fb4d93b0c1a0915", "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/marvell/octeontx2/af/rvu_cn10k.c" ], "versions": [ { "version": "5.14", "status": "affected" }, { "version": "0", "lessThan": "5.14", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.217", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.184", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "5.14", "versionEndExcluding": "5.15.217" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.1.184" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.6.148" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.12.101" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.18.42" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/04c014e49b9f53d58a8f94adece8a0af3ae1b85c" }, { "url": "https://git.kernel.org/stable/c/6967dd944be2a71eddab3a2ae1a1a4dd9e5f8eed" }, { "url": "https://git.kernel.org/stable/c/e9c5b03208507dd6d58b0c23a2c60b5c2f4c1b11" }, { "url": "https://git.kernel.org/stable/c/54535692bec9ef464adc714108eb19e49e38b5a2" }, { "url": "https://git.kernel.org/stable/c/c73b8795b45f4ad5a95120d2e9b435ea4616e08e" }, { "url": "https://git.kernel.org/stable/c/59da37fee81a8d76079313348ca13c5bc90dd6ae" }, { "url": "https://git.kernel.org/stable/c/8cdcf3d2caacdee7ddd363705fb4d93b0c1a0915" } ], "title": "octeontx2-af: cn10k: restrict VF LMTLINE sharing to its own PF", "x_generator": { "engine": "bippy-1.2.0" } } } }