| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Unconditionally save+flush host FPSIMD/SVE/SME state\n\nThere are several problems with the way hyp code lazily saves the host's\nFPSIMD/SVE state, including:\n\n* Host SVE being discarded unexpectedly due to inconsistent\n configuration of TIF_SVE and CPACR_ELx.ZEN. This has been seen to\n result in QEMU crashes where SVE is used by memmove(), as reported by\n Eric Auger:\n\n https://issues.redhat.com/browse/RHEL-68997\n\n* Host SVE state is discarded *after* modification by ptrace, which was an\n unintentional ptrace ABI change introduced with lazy discarding of SVE state.\n\n* The host FPMR value can be discarded when running a non-protected VM,\n where FPMR support is not exposed to a VM, and that VM uses\n FPSIMD/SVE. In these cases the hyp code does not save the host's FPMR\n before unbinding the host's FPSIMD/SVE/SME state, leaving a stale\n value in memory.\n\nAvoid these by eagerly saving and \"flushing\" the host's FPSIMD/SVE/SME\nstate when loading a vCPU such that KVM does not need to save any of the\nhost's FPSIMD/SVE/SME state. For clarity, fpsimd_kvm_prepare() is\nremoved and the necessary call to fpsimd_save_and_flush_cpu_state() is\nplaced in kvm_arch_vcpu_load_fp(). As 'fpsimd_state' and 'fpmr_ptr'\nshould not be used, they are set to NULL; all uses of these will be\nremoved in subsequent patches.\n\nHistorical problems go back at least as far as v5.17, e.g. erroneous\nassumptions about TIF_SVE being clear in commit:\n\n 8383741ab2e773a9 (\"KVM: arm64: Get rid of host SVE tracking/saving\")\n\n... and so this eager save+flush probably needs to be backported to ALL\nstable trees." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "arch/arm64/kernel/fpsimd.c", |
| "arch/arm64/kvm/fpsimd.c" |
| ], |
| "versions": [ |
| { |
| "version": "c4ab60a86c5ed7c0d727c6dc8cec352e16bc7f90", |
| "lessThan": "5289ac43b69c61a49c75720921f2008005a31c43", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "d5f7d3833b534f9e43e548461dba1e60aa82f587", |
| "lessThan": "04c50cc23a492c4d43fdaefc7c1ecc0ff6f7b82e", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "93ae6b01bafee8fa385aa25ee7ebdb40057f6abe", |
| "lessThan": "806d5c1e1d2e5502175a24bf70f251648d99c36a", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "93ae6b01bafee8fa385aa25ee7ebdb40057f6abe", |
| "lessThan": "79e140bba70bcacc5fe15bf8c0b958793fd7d56f", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "93ae6b01bafee8fa385aa25ee7ebdb40057f6abe", |
| "lessThan": "900b444be493b7f404898c785d6605b177a093d0", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "93ae6b01bafee8fa385aa25ee7ebdb40057f6abe", |
| "lessThan": "fbc7e61195e23f744814e78524b73b59faa54ab4", |
| "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/kernel/fpsimd.c", |
| "arch/arm64/kvm/fpsimd.c" |
| ], |
| "versions": [ |
| { |
| "version": "6.2", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "6.2", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.6.85", |
| "lessThanOrEqual": "6.6.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.21", |
| "lessThanOrEqual": "6.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.13.9", |
| "lessThanOrEqual": "6.13.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.14", |
| "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": "6.2", |
| "versionEndExcluding": "6.6.85" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.2", |
| "versionEndExcluding": "6.12.21" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.2", |
| "versionEndExcluding": "6.13.9" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.2", |
| "versionEndExcluding": "6.14" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/5289ac43b69c61a49c75720921f2008005a31c43" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/04c50cc23a492c4d43fdaefc7c1ecc0ff6f7b82e" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/806d5c1e1d2e5502175a24bf70f251648d99c36a" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/79e140bba70bcacc5fe15bf8c0b958793fd7d56f" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/900b444be493b7f404898c785d6605b177a093d0" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/fbc7e61195e23f744814e78524b73b59faa54ab4" |
| } |
| ], |
| "title": "KVM: arm64: Unconditionally save+flush host FPSIMD/SVE/SME state", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2025-22013", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
