CVE-2023-52847 remediation guide

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: media: bttv: fix use after free error due to btv->timeout timer There may be some a race condition between timer function bttv_irq_timeout and bttv_remove. The timer is setup in probe and there is no timer_delete operation in remove function. When it hit kfree btv, the function might still be invoked, which will cause use after free bug. This bug is found by static analysis, it may be false positive. Fix it by adding del_timer_sync invoking to the remove function. cpu0 cpu1 bttv_probe ->timer_setup ->bttv_set_dma ->mod_time...

Open CVE record

ProductLinux Linux, linux kernel

Affected versions>= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < bbc3b8dd2cb7817e703f112d988e4f4728f0f2a9, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < b35fdade92c5058a5e727e233fe263b828de2c9a, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < 2f3d9198cdae1cb079ec8652f4defacd481eab2b, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < 51c94256a83fe4e17406c66ff3e1ad7d242d8574, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < 20568d06f6069cb835e05eed432edf962645d226, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < 1871014d6ef4812ad11ef7d838d73ce09d632267, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < 847599fffa528b2cdec4e21b6bf7586dad982132, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < bd5b50b329e850d467e7bcc07b2b6bde3752fbda, >= 4.15, >= 4.15 < 4.19.299, >= 4.20 < 5.4.261, >= 5.5 < 5.10.201, >= 5.11 < 5.15.139, >= 5.16 < 6.1.63, >= 6.2 < 6.5.12, >= 6.6 < 6.6.2

Fixed versions4.19.299, 5.4.261, 5.10.201, 5.15.139, 6.1.63, 6.5.12, 6.6.2

Priority basisReview · CVSS 7 · EPSS 0.19%

Identify the affected asset

Confirm whether Linux Linux, linux kernel is installed, record the deployed version and installation path, and identify exposed interfaces.

Record the product name, package or appliance identifier, and installed version.
Identify internet-facing, administrative, API, and internal access paths.
Preserve the pre-change configuration and relevant service logs.

Validate the affected-version match

Compare the deployed version with the affected range: >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < bbc3b8dd2cb7817e703f112d988e4f4728f0f2a9, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < b35fdade92c5058a5e727e233fe263b828de2c9a, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < 2f3d9198cdae1cb079ec8652f4defacd481eab2b, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < 51c94256a83fe4e17406c66ff3e1ad7d242d8574, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < 20568d06f6069cb835e05eed432edf962645d226, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < 1871014d6ef4812ad11ef7d838d73ce09d632267, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < 847599fffa528b2cdec4e21b6bf7586dad982132, >= 162e6376ac58440beb6a2d2ee294f5d88ea58dd1 < bd5b50b329e850d467e7bcc07b2b6bde3752fbda, >= 4.15, >= 4.15 < 4.19.299, >= 4.20 < 5.4.261, >= 5.5 < 5.10.201, >= 5.11 < 5.15.139, >= 5.16 < 6.1.63, >= 6.2 < 6.5.12, >= 6.6 < 6.6.2. Treat incomplete inventory results as unresolved.

Prioritize with independent signals

The CVSS severity warrants an early asset and exposure review. Combine this signal with asset criticality, exposure, compensating controls, and business impact.

Apply supported remediation

Follow the vendor advisory or supported update path. Current fixed-version status: 4.19.299, 5.4.261, 5.10.201, 5.15.139, 6.1.63, 6.5.12, 6.6.2. Preserve configuration and rollback material before change.

Verify the result

Confirm the resulting version, service health, authentication and access paths, monitoring coverage, and relevant security logs.

Confirm the expected version and package state.
Run a functional health check for critical service paths.
Review authentication, error, application, and security monitoring logs.
Reassess exposure if the supported fix cannot be applied.

Operational boundary

This page does not replace the vendor advisory, support contract, change-management process, or recovery plan. Do not infer that an asset is unaffected from an incomplete inventory query or a missing fixed-version field.