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-2026-89877",
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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": "2026-09-11T19:38:34.772Z",
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"datePublished": "2026-09-16T10:31:44.194Z",
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"dateUpdated": "2026-10-30T12:33:22.773Z"
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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": "2026-10-30T12:33:22.773Z"
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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\nmedia: saa7164: fix cleanup on resource allocation failure\n\nsaa7164_dev_setup() adds the device to the global saa7164_devlist before\nrequesting the PCI BAR memory regions.\n\nIf get_resources() fails, saa7164_dev_setup() decrements the device count\nand returns an error, but leaves the device on saa7164_devlist. The probe\nerror path then frees the device, leaving a dangling entry on the global\nlist.\n\nReuse the existing MMIO mapping error path to remove the device from\nsaa7164_devlist and decrement the device count before returning.\n\nAlso release BAR0 if it was successfully requested but the BAR2 request\nfails."
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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:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.4,
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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 bug is reached only from saa7164 PCI probe (saa7164_initdev → saa7164_dev_setup → get_resources()) on a locally attached NXP SAA7164/Hauppauge HVR card; PVR, HTPC, and broadcast systems enumerate that function at boot, udev bind, or PCI/Thunderbolt hotplug, which is a local PCI probe path, not a network or USB protocol path.\nAC:L - A 1131:7164 function whose BAR0 or BAR2 cannot be reserved (zero-length BAR, overlap with busy iomem, or BAR2 failing after BAR0 was claimed) makes get_resources() return -EBUSY on every probe, so the dangling saa7164_devlist UAF is deterministic with no race or layout lottery the attacker cannot influence.\nPR:N - saa7164_initdev() performs no capability or authentication checks; when a matching PCI function appears, kernel enumeration and udev module autoload run the failing get_resources() path automatically without an OS account or user-namespace privilege.\nUI:N - Probe is invoked automatically by the PCI core and udev-driven module autoload on device enumeration; no victim must open a V4L/DVB node, load firmware, or otherwise interact.\nS:U - The dangling saa7164_devlist pointer and follow-on use-after-free remain inside the host kernel saa7164 driver and do not cross a VM, IOMMU, or sandbox security boundary.\nC:H - After kfree(dev) the global saa7164_devlist still points at the freed saa7164_dev; debugfs seq_start/seq_show and later probes walk that object, so reclaimed heap contents including kernel pointers can be read back — a use-after-free read primitive.\nI:H - The next list_add_tail() or list_del() on saa7164_devlist writes next/prev through the freed list node, corrupting whatever slab object reused that allocation and enabling an arbitrary kernel write and control-flow hijack.\nA:H - Walking or mutating the dangling saa7164_devlist entry after kfree causes a kernel oops or panic via poisoned-slab dereference or list corruption, fully denying availability."
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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/media/pci/saa7164/saa7164-core.c"
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],
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"versions": [
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{
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"version": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
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"lessThan": "ac9d7ca8199c64c320ba8177e3c0f7b0deb7ff06",
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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": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
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"lessThan": "99bf01e2563f8bdfe5f25e489596cff455a35d6b",
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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": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
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"lessThan": "daa5b32cdf7db81a07ee2a91ce092a363e7754aa",
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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": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
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"lessThan": "77f216f8de6221efb6f6c471bc9e598f1879825b",
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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": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
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"lessThan": "69259c627009bf7621010ae9e997dad2dad3339c",
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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": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
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"lessThan": "4d2048466af9e2c960c5be6dcd317e3b657d268b",
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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": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
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"lessThan": "fc65623524b5bf23baddc6ae688d954fba0d5de2",
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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": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
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"lessThan": "28e84c6e2e6753ed238ea097b2842a32a6a6879b",
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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/media/pci/saa7164/saa7164-core.c"
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],
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"versions": [
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{
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"version": "2.6.32",
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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": "2.6.32",
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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": "5.10.273",
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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": "5.15.224",
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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": "6.1.188",
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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": "6.6.157",
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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": "6.12.110",
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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": "6.18.51",
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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": "7.2.5",
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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": "2.6.32",
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"versionEndExcluding": "5.10.273"
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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": "2.6.32",
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"versionEndExcluding": "5.15.224"
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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": "2.6.32",
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"versionEndExcluding": "6.1.188"
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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": "2.6.32",
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"versionEndExcluding": "6.6.157"
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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": "2.6.32",
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"versionEndExcluding": "6.12.110"
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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": "2.6.32",
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"versionEndExcluding": "6.18.51"
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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": "2.6.32",
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"versionEndExcluding": "7.2.5"
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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": "2.6.32",
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"versionEndExcluding": "7.3"
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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/ac9d7ca8199c64c320ba8177e3c0f7b0deb7ff06"
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},
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{
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"url": "https://git.kernel.org/stable/c/99bf01e2563f8bdfe5f25e489596cff455a35d6b"
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},
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{
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"url": "https://git.kernel.org/stable/c/daa5b32cdf7db81a07ee2a91ce092a363e7754aa"
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},
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{
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"url": "https://git.kernel.org/stable/c/77f216f8de6221efb6f6c471bc9e598f1879825b"
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},
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{
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"url": "https://git.kernel.org/stable/c/69259c627009bf7621010ae9e997dad2dad3339c"
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},
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{
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"url": "https://git.kernel.org/stable/c/4d2048466af9e2c960c5be6dcd317e3b657d268b"
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},
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{
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"url": "https://git.kernel.org/stable/c/fc65623524b5bf23baddc6ae688d954fba0d5de2"
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},
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{
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"url": "https://git.kernel.org/stable/c/28e84c6e2e6753ed238ea097b2842a32a6a6879b"
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}
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],
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"title": "media: saa7164: fix cleanup on resource allocation failure",
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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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} |