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Message-ID: <2025050816-CVE-2025-37809-7d55@gregkh> Date: Thu, 8 May 2025 08:39:18 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2025-37809: usb: typec: class: Fix NULL pointer access From: Greg Kroah-Hartman <gregkh@...nel.org> Description =========== In the Linux kernel, the following vulnerability has been resolved: usb: typec: class: Fix NULL pointer access Concurrent calls to typec_partner_unlink_device can lead to a NULL pointer dereference. This patch adds a mutex to protect USB device pointers and prevent this issue. The same mutex protects both the device pointers and the partner device registration. The Linux kernel CVE team has assigned CVE-2025-37809 to this issue. Affected and fixed versions =========================== Issue introduced in 6.7 with commit 59de2a56d127890cc610f3896d5fc31887c54ac2 and fixed in 6.12.26 with commit de7c24febd21413ea8f49f61b36338b676c02852 Issue introduced in 6.7 with commit 59de2a56d127890cc610f3896d5fc31887c54ac2 and fixed in 6.14.5 with commit 1fdde62411fe65640e69bc55ea027d5b7b2f0093 Issue introduced in 6.7 with commit 59de2a56d127890cc610f3896d5fc31887c54ac2 and fixed in 6.15-rc4 with commit ec27386de23a511008c53aa2f3434ad180a3ca9a Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2025-37809 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/usb/typec/class.c drivers/usb/typec/class.h Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/de7c24febd21413ea8f49f61b36338b676c02852 https://git.kernel.org/stable/c/1fdde62411fe65640e69bc55ea027d5b7b2f0093 https://git.kernel.org/stable/c/ec27386de23a511008c53aa2f3434ad180a3ca9a
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