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Message-ID: <2025120942-CVE-2022-50659-8205@gregkh> Date: Tue, 9 Dec 2025 10:30:44 +0900 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2022-50659: hwrng: geode - Fix PCI device refcount leak From: Greg Kroah-Hartman <gregkh@...nel.org> Description =========== In the Linux kernel, the following vulnerability has been resolved: hwrng: geode - Fix PCI device refcount leak for_each_pci_dev() is implemented by pci_get_device(). The comment of pci_get_device() says that it will increase the reference count for the returned pci_dev and also decrease the reference count for the input pci_dev @from if it is not NULL. If we break for_each_pci_dev() loop with pdev not NULL, we need to call pci_dev_put() to decrease the reference count. We add a new struct 'amd_geode_priv' to record pointer of the pci_dev and membase, and then add missing pci_dev_put() for the normal and error path. The Linux kernel CVE team has assigned CVE-2022-50659 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.18 with commit ef5d862734b84239e0140319a95fb0bbff5ef394 and fixed in 4.9.337 with commit 88f4ea623f59155280d99d1a59a968f838472c4a Issue introduced in 2.6.18 with commit ef5d862734b84239e0140319a95fb0bbff5ef394 and fixed in 4.14.303 with commit e2f44baf62567c5cfbc274974c7d96dddad53ccc Issue introduced in 2.6.18 with commit ef5d862734b84239e0140319a95fb0bbff5ef394 and fixed in 4.19.270 with commit 6b9e43c4098f1310f5b4d52121d007a219fa5d43 Issue introduced in 2.6.18 with commit ef5d862734b84239e0140319a95fb0bbff5ef394 and fixed in 5.4.229 with commit 5cc818ad53df650cac8fb41d9066665366af3f03 Issue introduced in 2.6.18 with commit ef5d862734b84239e0140319a95fb0bbff5ef394 and fixed in 5.10.163 with commit aa96aff394a511cc7bb7df08d1b8504d4d97671e Issue introduced in 2.6.18 with commit ef5d862734b84239e0140319a95fb0bbff5ef394 and fixed in 5.15.86 with commit 82bd423ed977847652b2048b0f8dcf049b1847a9 Issue introduced in 2.6.18 with commit ef5d862734b84239e0140319a95fb0bbff5ef394 and fixed in 6.0.16 with commit 874f798c2db5ad595e46982d7f727a679dacb048 Issue introduced in 2.6.18 with commit ef5d862734b84239e0140319a95fb0bbff5ef394 and fixed in 6.1.2 with commit 19b7b85773b18457ff85a9ff4f5e2a2d4bf7ed0c Issue introduced in 2.6.18 with commit ef5d862734b84239e0140319a95fb0bbff5ef394 and fixed in 6.2 with commit 9f6ec8dc574efb7f4f3d7ee9cd59ae307e78f445 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-2022-50659 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/char/hw_random/geode-rng.c 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/88f4ea623f59155280d99d1a59a968f838472c4a https://git.kernel.org/stable/c/e2f44baf62567c5cfbc274974c7d96dddad53ccc https://git.kernel.org/stable/c/6b9e43c4098f1310f5b4d52121d007a219fa5d43 https://git.kernel.org/stable/c/5cc818ad53df650cac8fb41d9066665366af3f03 https://git.kernel.org/stable/c/aa96aff394a511cc7bb7df08d1b8504d4d97671e https://git.kernel.org/stable/c/82bd423ed977847652b2048b0f8dcf049b1847a9 https://git.kernel.org/stable/c/874f798c2db5ad595e46982d7f727a679dacb048 https://git.kernel.org/stable/c/19b7b85773b18457ff85a9ff4f5e2a2d4bf7ed0c https://git.kernel.org/stable/c/9f6ec8dc574efb7f4f3d7ee9cd59ae307e78f445
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