164 lines
8.8 KiB
JSON
164 lines
8.8 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-2026-64457",
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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": "2026-07-19T15:36:31.789Z",
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"datePublished": "2026-07-25T08:51:25.364Z",
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"dateUpdated": "2026-08-17T04:56:01.747Z"
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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": "2026-08-17T04:56:01.747Z"
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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\nvirtio_pci: fix vq info pointer lookup via wrong index\n\nUnbinding a virtio balloon device:\n\n echo virtio0 > /sys/bus/virtio/drivers/virtio_balloon/unbind\n\ntriggers a NULL pointer dereference. The dmesg says:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000008\n [...]\n RIP: 0010:__list_del_entry_valid_or_report+0x5/0xf0\n Call Trace:\n <TASK>\n vp_del_vqs+0x121/0x230\n remove_common+0x135/0x150\n virtballoon_remove+0xee/0x100\n virtio_dev_remove+0x3b/0x80\n device_release_driver_internal+0x187/0x2c0\n unbind_store+0xb9/0xe0\n kernfs_fop_write_iter.llvm.11660790530567441834+0xf6/0x180\n vfs_write+0x2a9/0x3b0\n ksys_write+0x5c/0xd0\n do_syscall_64+0x54/0x230\n entry_SYSCALL_64_after_hwframe+0x29/0x31\n [...]\n </TASK>\n\nThe virtio_balloon device registers 5 queues (inflate, deflate, stats,\nfree_page, reporting) but only the first two are unconditional. The\nstats, free_page and reporting queues are each conditional on their\nrespective feature bits. When any of these features are absent, the\ncorresponding vqs_info entry has name == NULL, creating holes in the\narray.\n\nThe root cause is an indexing mismatch introduced when vq info storage\nwas changed to be passed as an argument. vp_find_vqs_msix() and\nvp_find_vqs_intx() store the info pointer at vp_dev->vqs[i], where 'i'\nis the caller's sparse array index. However, the virtqueue itself gets\nvq->index assigned from queue_idx, a dense index that skips NULL\nentries. When holes exist, 'i' and queue_idx diverge. Later,\nvp_del_vqs() looks up info via vp_dev->vqs[vq->index] using the dense\nindex into the sparsely-populated array, and hits NULL.\n\nFix this by storing info at vp_dev->vqs[queue_idx] instead of\nvp_dev->vqs[i], so the store index matches the lookup index\n(vq->index). Apply the fix to both the MSIX and INTX paths."
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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/virtio/virtio_pci_common.c"
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],
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"versions": [
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{
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"version": "89a1c435aec269d109ed46ca7bbb10fa8edf7ace",
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"lessThan": "41e6dc1a10036c9f47057033f19af7e52ec464b6",
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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": "89a1c435aec269d109ed46ca7bbb10fa8edf7ace",
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"lessThan": "075bc3c779e1ea7294afabdcb7e0a49536959b28",
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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": "89a1c435aec269d109ed46ca7bbb10fa8edf7ace",
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"lessThan": "64a4c0befa77bcc01076aec9f93863ffd4ed06b7",
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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": "89a1c435aec269d109ed46ca7bbb10fa8edf7ace",
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"lessThan": "f7d380fb525c13bdd114369a1979c80c346e6abc",
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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/virtio/virtio_pci_common.c"
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],
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"versions": [
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{
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"version": "6.11",
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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": "6.11",
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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": "6.12.96",
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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": "6.18.39",
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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": "7.1.4",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "6.11",
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"versionEndExcluding": "6.12.96"
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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": "6.11",
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"versionEndExcluding": "6.18.39"
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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": "6.11",
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"versionEndExcluding": "7.1.4"
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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": "6.11",
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"versionEndExcluding": "7.2"
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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/41e6dc1a10036c9f47057033f19af7e52ec464b6"
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},
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{
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"url": "https://git.kernel.org/stable/c/075bc3c779e1ea7294afabdcb7e0a49536959b28"
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},
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{
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"url": "https://git.kernel.org/stable/c/64a4c0befa77bcc01076aec9f93863ffd4ed06b7"
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},
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{
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"url": "https://git.kernel.org/stable/c/f7d380fb525c13bdd114369a1979c80c346e6abc"
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}
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],
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"title": "virtio_pci: fix vq info pointer lookup via wrong index",
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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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} |