{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-89877", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.772Z", "datePublished": "2026-09-16T10:31:44.194Z", "dateUpdated": "2026-10-19T08:54:10.126Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:54:10.126Z" }, "descriptions": [ { "lang": "en", "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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/pci/saa7164/saa7164-core.c" ], "versions": [ { "version": "443c1228d50518f3c550e1fef490a2c9d9246ce7", "lessThan": "daa5b32cdf7db81a07ee2a91ce092a363e7754aa", "status": "affected", "versionType": "git" }, { "version": "443c1228d50518f3c550e1fef490a2c9d9246ce7", "lessThan": "77f216f8de6221efb6f6c471bc9e598f1879825b", "status": "affected", "versionType": "git" }, { "version": "443c1228d50518f3c550e1fef490a2c9d9246ce7", "lessThan": "69259c627009bf7621010ae9e997dad2dad3339c", "status": "affected", "versionType": "git" }, { "version": "443c1228d50518f3c550e1fef490a2c9d9246ce7", "lessThan": "4d2048466af9e2c960c5be6dcd317e3b657d268b", "status": "affected", "versionType": "git" }, { "version": "443c1228d50518f3c550e1fef490a2c9d9246ce7", "lessThan": "fc65623524b5bf23baddc6ae688d954fba0d5de2", "status": "affected", "versionType": "git" }, { "version": "443c1228d50518f3c550e1fef490a2c9d9246ce7", "lessThan": "28e84c6e2e6753ed238ea097b2842a32a6a6879b", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/pci/saa7164/saa7164-core.c" ], "versions": [ { "version": "2.6.32", "status": "affected" }, { "version": "0", "lessThan": "2.6.32", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "2.6.32", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.12.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.18.51" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "7.2.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/daa5b32cdf7db81a07ee2a91ce092a363e7754aa" }, { "url": "https://git.kernel.org/stable/c/77f216f8de6221efb6f6c471bc9e598f1879825b" }, { "url": "https://git.kernel.org/stable/c/69259c627009bf7621010ae9e997dad2dad3339c" }, { "url": "https://git.kernel.org/stable/c/4d2048466af9e2c960c5be6dcd317e3b657d268b" }, { "url": "https://git.kernel.org/stable/c/fc65623524b5bf23baddc6ae688d954fba0d5de2" }, { "url": "https://git.kernel.org/stable/c/28e84c6e2e6753ed238ea097b2842a32a6a6879b" } ], "title": "media: saa7164: fix cleanup on resource allocation failure", "x_generator": { "engine": "bippy-1.2.0" } } } }