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Message-ID: <2024102112-CVE-2024-47747-8dca@gregkh> Date: Mon, 21 Oct 2024 14:16:26 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2024-47747: net: seeq: Fix use after free vulnerability in ether3 Driver Due to Race Condition Description =========== In the Linux kernel, the following vulnerability has been resolved: net: seeq: Fix use after free vulnerability in ether3 Driver Due to Race Condition In the ether3_probe function, a timer is initialized with a callback function ether3_ledoff, bound to &prev(dev)->timer. Once the timer is started, there is a risk of a race condition if the module or device is removed, triggering the ether3_remove function to perform cleanup. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | ether3_ledoff ether3_remove | free_netdev(dev); | put_devic | kfree(dev); | | ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2); | // use dev Fix it by ensuring that the timer is canceled before proceeding with the cleanup in ether3_remove. The Linux kernel CVE team has assigned CVE-2024-47747 to this issue. Affected and fixed versions =========================== Issue introduced in 4.15 with commit 6fd9c53f7186 and fixed in 5.10.227 with commit 338a0582b28e Issue introduced in 4.15 with commit 6fd9c53f7186 and fixed in 5.15.168 with commit 822c7bb1f6f8 Issue introduced in 4.15 with commit 6fd9c53f7186 and fixed in 6.1.113 with commit 1c57d61a4329 Issue introduced in 4.15 with commit 6fd9c53f7186 and fixed in 6.6.54 with commit d2abc3790718 Issue introduced in 4.15 with commit 6fd9c53f7186 and fixed in 6.10.13 with commit 516dbc6d1663 Issue introduced in 4.15 with commit 6fd9c53f7186 and fixed in 6.11.2 with commit 77a77331cef0 Issue introduced in 4.15 with commit 6fd9c53f7186 and fixed in 6.12-rc1 with commit b5109b60ee4f 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-2024-47747 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/seeq/ether3.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/338a0582b28e69460df03af50e938b86b4206353 https://git.kernel.org/stable/c/822c7bb1f6f8b0331e8d1927151faf8db3b33afd https://git.kernel.org/stable/c/1c57d61a43293252ad732007c7070fdb112545fd https://git.kernel.org/stable/c/d2abc379071881798d20e2ac1d332ad855ae22f3 https://git.kernel.org/stable/c/516dbc6d16637430808c39568cbb6b841d32b55b https://git.kernel.org/stable/c/77a77331cef0a219b8dd91361435eeef04cb741c https://git.kernel.org/stable/c/b5109b60ee4fcb2f2bb24f589575e10cc5283ad4
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