226 lines
12 KiB
JSON
226 lines
12 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-2026-31436",
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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": "2026-03-09T15:48:24.089Z",
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"datePublished": "2026-04-22T13:53:35.693Z",
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"dateUpdated": "2026-10-19T18:35:48.060Z"
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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": "2026-08-05T12:22:33.386Z"
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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\ndmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc()\n\nAt the end of this function, d is the traversal cursor of flist, but the\ncode completes found instead. This can lead to issues such as NULL pointer\ndereferences, double completion, or descriptor leaks.\n\nFix this by completing d instead of found in the final\nlist_for_each_entry_safe() loop."
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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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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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:N - In a reasonable network-facing deployment, XFRM/IPComp packets can reach `ipcomp_input()` and `crypto_acomp_decompress()`, which can use the IAA `deflate` acomp implementation and submit idxd descriptors. This makes the vulnerable idxd completion-abort path reachable from network traffic.\nAC:L - The vulnerable path requires an interrupt-completion shared workqueue and an `ENQCMDS` failure, but under that deployment the attacker can drive concurrent compression/decompression requests to create WQ pressure. No uncontrollable race or precise timing is required beyond triggering descriptor submission failure under load.\nPR:N - For the network IPComp path, the attacker only needs to send packets to an already configured endpoint and does not need a local account or kernel capability. Administrative setup of the transform/workqueue is treated as deployment configuration, not attacker privilege.\nUI:N - No victim interaction is needed once the vulnerable network-facing configuration is active. Packets or repeated requests can trigger the descriptor submission and abort path directly.\nS:U - The bug corrupts or crashes kernel-owned idxd/dmaengine state within the same kernel security authority. It does not by itself demonstrate a VM escape, IOMMU bypass, or cross-scope boundary violation.\nC:H - Completing the wrong descriptor can cause double completion and premature descriptor reuse, creating UAF/type-confusion-like corruption of kernel request and callback state. Following the high-severity rule for such memory corruption, kernel memory disclosure is defensible.\nI:H - Wrong descriptor completion can recycle an in-flight descriptor and later complete or reuse it for another request, corrupting DMA/crypto request state and potentially enabling control-flow or data corruption. When uncertain, this is scored as high integrity impact.\nA:H - The fix commit explicitly identifies possible NULL pointer dereferences, double completion, and descriptor leaks. These can crash or hang kernel workqueue processing, giving high availability impact."
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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/dma/idxd/submit.c"
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],
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"versions": [
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{
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"version": "aa8d18becc0c14aa3eb46d6d1b81450446e11b87",
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"lessThan": "e21da2ad8844585040fe4b82be1ad2fe99d40074",
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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": "aa8d18becc0c14aa3eb46d6d1b81450446e11b87",
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"lessThan": "82656e8daf8de00935ae91b91bed43f4d6e0d644",
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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": "aa8d18becc0c14aa3eb46d6d1b81450446e11b87",
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"lessThan": "0e4f43779d550e559be13a5cdb763bad92c4cc99",
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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": "aa8d18becc0c14aa3eb46d6d1b81450446e11b87",
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"lessThan": "e1c9866173c5f8521f2d0768547a01508cb9ff27",
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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/dma/idxd/submit.c"
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],
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"versions": [
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{
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"version": "6.8",
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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": "6.8",
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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": "6.12.80",
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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": "6.18.21",
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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": "6.19.11",
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"lessThanOrEqual": "6.19.*",
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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": "7.0",
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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": "6.8",
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"versionEndExcluding": "6.12.80"
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},
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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": "6.8",
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"versionEndExcluding": "6.18.21"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.8",
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"versionEndExcluding": "6.19.11"
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},
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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": "6.8",
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"versionEndExcluding": "7.0"
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}
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]
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}
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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/e21da2ad8844585040fe4b82be1ad2fe99d40074"
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},
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{
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"url": "https://git.kernel.org/stable/c/82656e8daf8de00935ae91b91bed43f4d6e0d644"
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},
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{
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"url": "https://git.kernel.org/stable/c/0e4f43779d550e559be13a5cdb763bad92c4cc99"
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},
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{
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"url": "https://git.kernel.org/stable/c/e1c9866173c5f8521f2d0768547a01508cb9ff27"
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}
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],
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"title": "dmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc()",
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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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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-31436",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:09:16.062641Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-758",
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"description": "CWE-758 Reliance on Undefined, Unspecified, or Implementation-Defined Behavior"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T18:35:48.060Z"
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}
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}
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]
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}
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} |