{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2024-26598", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.128Z", "datePublished": "2024-02-23T14:46:26.672Z", "dateUpdated": "2026-08-05T11:26:10.792Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:26:10.792Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic-its: Avoid potential UAF in LPI translation cache\n\nThere is a potential UAF scenario in the case of an LPI translation\ncache hit racing with an operation that invalidates the cache, such\nas a DISCARD ITS command. The root of the problem is that\nvgic_its_check_cache() does not elevate the refcount on the vgic_irq\nbefore dropping the lock that serializes refcount changes.\n\nHave vgic_its_check_cache() raise the refcount on the returned vgic_irq\nand add the corresponding decrement after queueing the interrupt." } ], "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 running code inside a KVM/arm64 guest (to issue ITS DISCARD/MAPD commands via GITS_CWRITER) or holding local /dev/kvm access to drive KVM_SIGNAL_MSI, so the attacker needs local access to the host or a VM on it. No purely remote network path can drive both sides of the race.\nAC:L - The attacker controls both sides of the race — one vCPU thread issues DISCARD/MAPD ITS commands while another CPU (vhost worker via irqfd, or a userspace KVM_SIGNAL_MSI thread) performs the cache lookup — and can prime the cache deterministically with an INT command and repeat the loop indefinitely without any detection or rate limit.\nPR:L - The attacker only needs to be an unprivileged guest (or a local unprivileged user with /dev/kvm access, which is standard on virtualization hosts); no host root or special capability is required, and ITS emulation is created by default by QEMU's virt machine with GICv3.\nUI:N - The entire sequence — MAPTI/INT to populate the translation cache, MSI generation, and the DISCARD command — is driven autonomously by the attacker from inside the guest. No victim action is needed.\nS:C - The vulnerable component is KVM's vGIC ITS emulation, whose security authority is the guest VM, but the corrupted memory is host kernel heap; a guest crossing into host kernel memory is a guest-to-host boundary violation.\nC:H - The freed vgic_irq can be reallocated with attacker-controlled data and is then read back (intid, priority, group, config, vcpu/target_vcpu pointers) and re-linked into live host kernel lists, giving an arbitrary-pointer dereference and kernel memory disclosure primitive.\nI:H - The stale pointer is written through — spinlock acquire, pending_latch store, kref increment, and list_add_tail writing both into the freed chunk and storing its address into the live ap_list — a use-after-free write primitive leveragable for control-flow hijack and host privilege escalation.\nA:H - Even without successful heap grooming, the use-after-free corrupts the vgic ap_list and LPI list, reliably producing kernel oops, list-corruption BUG, or lock-up, taking down the entire host and all co-resident VMs." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/arm64/kvm/vgic/vgic-its.c" ], "versions": [ { "version": "6211753fdfd05af9e08f54c8d0ba3ee516034878", "lessThan": "d04acadb6490aa3314f9c9e087691e55de153b88", "status": "affected", "versionType": "git" }, { "version": "6211753fdfd05af9e08f54c8d0ba3ee516034878", "lessThan": "ba7be666740847d967822bed15500656b26bc703", "status": "affected", "versionType": "git" }, { "version": "6211753fdfd05af9e08f54c8d0ba3ee516034878", "lessThan": "12c2759ab1343c124ed46ba48f27bd1ef5d2dff4", "status": "affected", "versionType": "git" }, { "version": "6211753fdfd05af9e08f54c8d0ba3ee516034878", "lessThan": "dba788e25f05209adf2b0175eb1691dc89fb1ba6", "status": "affected", "versionType": "git" }, { "version": "6211753fdfd05af9e08f54c8d0ba3ee516034878", "lessThan": "65b201bf3e9af1b0254243a5881390eda56f72d1", "status": "affected", "versionType": "git" }, { "version": "6211753fdfd05af9e08f54c8d0ba3ee516034878", "lessThan": "dd3956a1b3dd11f46488c928cb890d6937d1ca80", "status": "affected", "versionType": "git" }, { "version": "6211753fdfd05af9e08f54c8d0ba3ee516034878", "lessThan": "ad362fe07fecf0aba839ff2cc59a3617bd42c33f", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/arm64/kvm/vgic/vgic-its.c" ], "versions": [ { "version": "3.11", "status": "affected" }, { "version": "0", "lessThan": "3.11", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.269", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.209", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.148", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.75", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.14", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.2", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8", "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": "3.11", "versionEndExcluding": "5.4.269" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "5.10.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "5.15.148" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.1.75" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.6.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.7.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.8" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d04acadb6490aa3314f9c9e087691e55de153b88" }, { "url": "https://git.kernel.org/stable/c/ba7be666740847d967822bed15500656b26bc703" }, { "url": "https://git.kernel.org/stable/c/12c2759ab1343c124ed46ba48f27bd1ef5d2dff4" }, { "url": "https://git.kernel.org/stable/c/dba788e25f05209adf2b0175eb1691dc89fb1ba6" }, { "url": "https://git.kernel.org/stable/c/65b201bf3e9af1b0254243a5881390eda56f72d1" }, { "url": "https://git.kernel.org/stable/c/dd3956a1b3dd11f46488c928cb890d6937d1ca80" }, { "url": "https://git.kernel.org/stable/c/ad362fe07fecf0aba839ff2cc59a3617bd42c33f" } ], "title": "KVM: arm64: vgic-its: Avoid potential UAF in LPI translation cache", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:07:19.689Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/d04acadb6490aa3314f9c9e087691e55de153b88", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/ba7be666740847d967822bed15500656b26bc703", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/12c2759ab1343c124ed46ba48f27bd1ef5d2dff4", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/dba788e25f05209adf2b0175eb1691dc89fb1ba6", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/65b201bf3e9af1b0254243a5881390eda56f72d1", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/dd3956a1b3dd11f46488c928cb890d6937d1ca80", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/ad362fe07fecf0aba839ff2cc59a3617bd42c33f", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html", "tags": [ "x_transferred" ] } ] }, { "problemTypes": [ { "descriptions": [ { "type": "CWE", "cweId": "CWE-416", "lang": "en", "description": "CWE-416 Use After Free" } ] } ], "affected": [ { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "1da177e4c3f4", "status": "affected", "lessThan": "d04acadb6490", "versionType": "custom" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "ba7be6667408", "versionType": "custom" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "12c2759ab134", "versionType": "custom" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "dba788e25f05", "versionType": "custom" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "65b201bf3e9a", "versionType": "custom" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "dd3956a1b3dd", "versionType": "custom" }, { "version": "1da177e4c3f4", "status": "affected", "lessThan": "ad362fe07fec", "versionType": "custom" }, { "version": "5.4.269", "status": "unaffected", "lessThanOrEqual": "5.5", "versionType": "custom" }, { "version": "5.10.209", "status": "unaffected", "lessThanOrEqual": "5.11", "versionType": "custom" }, { "version": "5.15.148", "status": "unaffected", "lessThanOrEqual": "5.16", "versionType": "custom" }, { "version": "6.1.75", "status": "unaffected", "lessThanOrEqual": "6.2", "versionType": "custom" }, { "version": "6.6.14", "status": "unaffected", "lessThanOrEqual": "6.7", "versionType": "custom" }, { "version": "6.7.2", "status": "unaffected", "lessThanOrEqual": "6.8", "versionType": "custom" }, { "version": "6.8", "status": "unaffected", "lessThanOrEqual": "*", "versionType": "custom" } ] } ], "metrics": [ { "cvssV3_1": { "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" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2025-04-22T16:15:47.782832Z", "id": "CVE-2024-26598", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-22T16:16:01.155Z" } } ] }, "dataVersion": "5.2" }