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CVE-2026-89877: media: saa7164: fix cleanup on resource allocation failure

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: media: saa7164: fix cleanup on resource allocation failure saa7164_dev_setup() adds the device to the global saa7164_devlist before requesting the PCI BAR memory regions. If get_resources() fails, saa7164_dev_setup() decrements the device count and returns an error, but leaves the device on saa7164_devlist. The probe error path then frees the device, leaving a dangling entry on the global list. Reuse the existing MMIO mapping error path to remove the device from saa7164_devlist and decrement the device count before returning. Also release BAR0 if it was successfully requested but the BAR2 request fails.

Affected products

• Linux: 2.6.32 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/28e84c6e2e6753ed238ea097b2842a32a6a6879b
• https://git.kernel.org/stable/c/4d2048466af9e2c960c5be6dcd317e3b657d268b
• https://git.kernel.org/stable/c/69259c627009bf7621010ae9e997dad2dad3339c
• https://git.kernel.org/stable/c/77f216f8de6221efb6f6c471bc9e598f1879825b
• https://git.kernel.org/stable/c/99bf01e2563f8bdfe5f25e489596cff455a35d6b
• https://git.kernel.org/stable/c/ac9d7ca8199c64c320ba8177e3c0f7b0deb7ff06
• https://git.kernel.org/stable/c/daa5b32cdf7db81a07ee2a91ce092a363e7754aa
• https://git.kernel.org/stable/c/fc65623524b5bf23baddc6ae688d954fba0d5de2

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