264 lines
14 KiB
JSON
264 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-97957",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-25T10:18:58.205Z",
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"datePublished": "2026-09-25T10:23:03.153Z",
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"dateUpdated": "2026-10-19T09:11:23.333Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:11:23.333Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hinic: fix mailbox segment buffer overflow\n\ncheck_mbox_seq_id_and_seg_len() validates that seq_id does not\nexceed SEQ_ID_MAX_VAL (42) and seg_len does not exceed\nMBOX_SEG_LEN (48). However, this allows the last segment\n(seq_id=42) to carry a full 48-byte payload, writing to offset\n42*48=2016 for 48 bytes (ending at byte 2064). The receive\nbuffer is only MBOX_MAX_BUF_SZ (2048) bytes, resulting in a\n16-byte heap buffer overflow.\n\nThe hinic3 driver already handles this correctly by defining\nMBOX_LAST_SEG_MAX_LEN and rejecting the last segment when it\nexceeds the remaining buffer space. Apply the same fix to the\nhinic driver."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The malformed input is a mailbox header (SEQID/SEG_LEN) and 48-byte body that a VF driver writes into its own mailbox registers. The hardware delivers it to the PF's hinic_mbox_func_aeqe_handler() -> recv_mbox_handler(). The attacker is code running in a guest that owns an SR-IOV VF (or a local driver), not a remote network peer, so this is local access.\nAC:L - The attacker sends segments seq_id 0..42 in order, each with seg_len=48. check_mbox_seq_id_and_seg_len() accepts all of them, and the memcpy at offset 42*48 overflows every time. The only setup is a VF assigned to the attacker's VM, which is the standard SR-IOV passthrough deployment. Nothing depends on timing or state outside the attacker's control.\nPR:L - Writing raw mailbox headers needs kernel control of the VF, i.e. root inside the guest. A VM tenant always has that, and it gives no privilege on the host whose PF driver is corrupted. The random id checked by check_vf_mbox_random_id() is given to every genuine VF, so it does not stop a hostile VF driver.\nUI:N - The PF host processes the mailbox message on its own from the AEQ handler. Nobody on the host has to do anything.\nS:C - The bug is in a guest-controlled VF's messages, but the overflow corrupts the host kernel heap in the PF driver (recv_mbox->mbox, kzalloc(2048)). That crosses the guest-to-host boundary, like a VM escape.\nC:H - Overwriting the first 16 bytes of the neighbouring kmalloc-2048 object with attacker-chosen data can corrupt pointers or length fields in that object. That is a normal route to reading arbitrary host kernel memory.\nI:H - recv_mbox_handler() copies 16 attacker-chosen bytes from the mailbox body past the end of the 2048-byte receive buffer. This is a controlled heap out-of-bounds write in the host kernel, which can lead to control-flow hijack.\nA:H - The guest can repeat the corruption of the neighbouring host heap object at will, crashing or panicking the host kernel. That takes down every tenant on the host."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c"
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],
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"versions": [
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{
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"version": "a425b6e1c69ba907b72b737a4d44f8cfbc43ce3c",
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"lessThan": "7cc974799fde846eda2d8f00ad4f8e1810eb0499",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a425b6e1c69ba907b72b737a4d44f8cfbc43ce3c",
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"lessThan": "8de1e23bd91fe3a6683e4bc574e2d6bcb0eef920",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a425b6e1c69ba907b72b737a4d44f8cfbc43ce3c",
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"lessThan": "72be1fd5d256dde748c0905c5e1749a119cad5bd",
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"status": "affected",
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},
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{
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"version": "a425b6e1c69ba907b72b737a4d44f8cfbc43ce3c",
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"lessThan": "c622bbc212207d7c6bbd69dd88f0c3a3f5853d16",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a425b6e1c69ba907b72b737a4d44f8cfbc43ce3c",
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"lessThan": "eca54a092d5f7b497b458ff5a6f66d4f7bfb6674",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a425b6e1c69ba907b72b737a4d44f8cfbc43ce3c",
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"lessThan": "9f6ad383901d0cb1c8ea5f7f3160fabfe1540eb5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a425b6e1c69ba907b72b737a4d44f8cfbc43ce3c",
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"lessThan": "513f7b16ed0cffae9348151c72bed17c7073096f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a425b6e1c69ba907b72b737a4d44f8cfbc43ce3c",
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"lessThan": "5d4d985957434867bbe85e4fa5e638f3e48ad522",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c"
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],
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"versions": [
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{
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"version": "5.8",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.8",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.271",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.222",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.189",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.158",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.111",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.53",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.7",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "5.10.271"
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},
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{
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/7cc974799fde846eda2d8f00ad4f8e1810eb0499"
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},
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{
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"url": "https://git.kernel.org/stable/c/8de1e23bd91fe3a6683e4bc574e2d6bcb0eef920"
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},
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{
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"url": "https://git.kernel.org/stable/c/72be1fd5d256dde748c0905c5e1749a119cad5bd"
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},
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{
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"url": "https://git.kernel.org/stable/c/c622bbc212207d7c6bbd69dd88f0c3a3f5853d16"
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},
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{
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"url": "https://git.kernel.org/stable/c/eca54a092d5f7b497b458ff5a6f66d4f7bfb6674"
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},
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{
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"url": "https://git.kernel.org/stable/c/9f6ad383901d0cb1c8ea5f7f3160fabfe1540eb5"
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},
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{
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"url": "https://git.kernel.org/stable/c/513f7b16ed0cffae9348151c72bed17c7073096f"
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},
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{
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"url": "https://git.kernel.org/stable/c/5d4d985957434867bbe85e4fa5e638f3e48ad522"
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}
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],
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"title": "net: hinic: fix mailbox segment buffer overflow",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |