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Message-ID: <2024030250-CVE-2023-52509-997c@gregkh> Date: Sat, 2 Mar 2024 22:52:54 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2023-52509: ravb: Fix use-after-free issue in ravb_tx_timeout_work() Description =========== In the Linux kernel, the following vulnerability has been resolved: ravb: Fix use-after-free issue in ravb_tx_timeout_work() The ravb_stop() should call cancel_work_sync(). Otherwise, ravb_tx_timeout_work() is possible to use the freed priv after ravb_remove() was called like below: CPU0 CPU1 ravb_tx_timeout() ravb_remove() unregister_netdev() free_netdev(ndev) // free priv ravb_tx_timeout_work() // use priv unregister_netdev() will call .ndo_stop() so that ravb_stop() is called. And, after phy_stop() is called, netif_carrier_off() is also called. So that .ndo_tx_timeout() will not be called after phy_stop(). The Linux kernel CVE team has assigned CVE-2023-52509 to this issue. Affected and fixed versions =========================== Issue introduced in 4.2 with commit c156633f1353 and fixed in 5.4.259 with commit 65d34cfd4e34 Issue introduced in 4.2 with commit c156633f1353 and fixed in 5.10.199 with commit db9aafa19547 Issue introduced in 4.2 with commit c156633f1353 and fixed in 5.15.136 with commit 616761cf9df9 Issue introduced in 4.2 with commit c156633f1353 and fixed in 6.1.59 with commit 6f6fa8061f75 Issue introduced in 4.2 with commit c156633f1353 and fixed in 6.5.8 with commit 105abd68ad8f Issue introduced in 4.2 with commit c156633f1353 and fixed in 6.6 with commit 397144287071 Please see https://www.kernel.org or 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-2023-52509 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/net/ethernet/renesas/ravb_main.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/65d34cfd4e347054eb4193bc95d9da7eaa72dee5 https://git.kernel.org/stable/c/db9aafa19547833240f58c2998aed7baf414dc82 https://git.kernel.org/stable/c/616761cf9df9af838c0a1a1232a69322a9eb67e6 https://git.kernel.org/stable/c/6f6fa8061f756aedb93af12a8a5d3cf659127965 https://git.kernel.org/stable/c/105abd68ad8f781985113aee2e92e0702b133705 https://git.kernel.org/stable/c/3971442870713de527684398416970cf025b4f89
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