What’s Vulnerable › Vulnerabilities

CVE-2023-54197: Revert "Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work"

• Severity: unknown
• 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: 2025-12-30 · updated 2026-10-28

Description

In the Linux kernel, the following vulnerability has been resolved: Revert "Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work" This reverts commit 1e9ac114c4428fdb7ff4635b45d4f46017e8916f. This patch introduces a possible null-ptr-def problem. Revert it. And the fixed bug by this patch have resolved by commit 73f7b171b7c0 ("Bluetooth: btsdio: fix use after free bug in btsdio_remove due to race condition").

Affected products

• Linux kernel: from 4.14.312 before 4.14.315; from 4.19.280 before 4.19.283; from 5.4.240 before 5.4.243; from 5.10.177 before 5.10.180; from 5.15.105 before 5.15.111; from 6.1.22 before 6.1.28 — fixed in 4.14.315, 4.19.283, 5.10.180, 5.15.111, 5.4.243, 6.1.28

How to fix

Upgrade to a fixed version: Linux kernel 4.14.315, 4.19.283, 5.10.180, 5.15.111. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0837d10f6c37a47a0c73bccf1e39513613a2fcc2
• https://git.kernel.org/stable/c/3b4ed52009723f7dfca7a8ca95163bfb441bfb76
• https://git.kernel.org/stable/c/70a104588e3131415e559c06deb834ce259a285a
• https://git.kernel.org/stable/c/8f83fa62614c282dd5d1211a0dd99c6a0a515b81
• https://git.kernel.org/stable/c/952030c914b5f2288609efe868537afcff7a3f51
• https://git.kernel.org/stable/c/a789192f366147a0fbb395650079906d1d04e0b9
• https://git.kernel.org/stable/c/d8d7ce037d9a8f1f0714ece268c4c2c50845bbc3
• https://git.kernel.org/stable/c/db2bf510bd5d57f064d9e1db395ed86a08320c54
• https://git.kernel.org/stable/c/de0ffb5145c9f418ad76f00e58d4b91c680410b2

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