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Message-ID: <2025070337-CVE-2025-38153-5735@gregkh> Date: Thu, 3 Jul 2025 10:36:09 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2025-38153: net: usb: aqc111: fix error handling of usbnet read calls From: Greg Kroah-Hartman <gregkh@...nel.org> Description =========== In the Linux kernel, the following vulnerability has been resolved: net: usb: aqc111: fix error handling of usbnet read calls Syzkaller, courtesy of syzbot, identified an error (see report [1]) in aqc111 driver, caused by incomplete sanitation of usb read calls' results. This problem is quite similar to the one fixed in commit 920a9fa27e78 ("net: asix: add proper error handling of usb read errors"). For instance, usbnet_read_cmd() may read fewer than 'size' bytes, even if the caller expected the full amount, and aqc111_read_cmd() will not check its result properly. As [1] shows, this may lead to MAC address in aqc111_bind() being only partly initialized, triggering KMSAN warnings. Fix the issue by verifying that the number of bytes read is as expected and not less. [1] Partial syzbot report: BUG: KMSAN: uninit-value in is_valid_ether_addr include/linux/etherdevice.h:208 [inline] BUG: KMSAN: uninit-value in usbnet_probe+0x2e57/0x4390 drivers/net/usb/usbnet.c:1830 is_valid_ether_addr include/linux/etherdevice.h:208 [inline] usbnet_probe+0x2e57/0x4390 drivers/net/usb/usbnet.c:1830 usb_probe_interface+0xd01/0x1310 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x4d1/0xd90 drivers/base/dd.c:658 __driver_probe_device+0x268/0x380 drivers/base/dd.c:800 ... Uninit was stored to memory at: dev_addr_mod+0xb0/0x550 net/core/dev_addr_lists.c:582 __dev_addr_set include/linux/netdevice.h:4874 [inline] eth_hw_addr_set include/linux/etherdevice.h:325 [inline] aqc111_bind+0x35f/0x1150 drivers/net/usb/aqc111.c:717 usbnet_probe+0xbe6/0x4390 drivers/net/usb/usbnet.c:1772 usb_probe_interface+0xd01/0x1310 drivers/usb/core/driver.c:396 ... Uninit was stored to memory at: ether_addr_copy include/linux/etherdevice.h:305 [inline] aqc111_read_perm_mac drivers/net/usb/aqc111.c:663 [inline] aqc111_bind+0x794/0x1150 drivers/net/usb/aqc111.c:713 usbnet_probe+0xbe6/0x4390 drivers/net/usb/usbnet.c:1772 usb_probe_interface+0xd01/0x1310 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] ... Local variable buf.i created at: aqc111_read_perm_mac drivers/net/usb/aqc111.c:656 [inline] aqc111_bind+0x221/0x1150 drivers/net/usb/aqc111.c:713 usbnet_probe+0xbe6/0x4390 drivers/net/usb/usbnet.c:1772 The Linux kernel CVE team has assigned CVE-2025-38153 to this issue. Affected and fixed versions =========================== Issue introduced in 5.0 with commit df2d59a2ab6c9ceac2c4104272fce03493b8f62f and fixed in 5.4.295 with commit 8c97655275482ef5384ce0501640630a0fc0f6f4 Issue introduced in 5.0 with commit df2d59a2ab6c9ceac2c4104272fce03493b8f62f and fixed in 5.10.239 with commit 11273279012c922f37cfb4dd95d142803fc07b98 Issue introduced in 5.0 with commit df2d59a2ab6c9ceac2c4104272fce03493b8f62f and fixed in 5.15.186 with commit f398d2dfe450ce2c031d10b585448862d74a0501 Issue introduced in 5.0 with commit df2d59a2ab6c9ceac2c4104272fce03493b8f62f and fixed in 6.1.142 with commit acb47a40b5e38be03ef659b7bacdddc592ed73b7 Issue introduced in 5.0 with commit df2d59a2ab6c9ceac2c4104272fce03493b8f62f and fixed in 6.6.94 with commit 60790d287c1a1ced3554d4a87c2f27bf299a932a Issue introduced in 5.0 with commit df2d59a2ab6c9ceac2c4104272fce03493b8f62f and fixed in 6.12.34 with commit 30a9e834c74e260533b8d0885e3c89f6f32f7993 Issue introduced in 5.0 with commit df2d59a2ab6c9ceac2c4104272fce03493b8f62f and fixed in 6.15.3 with commit 7c01863b1c47f040d9674171e77789a423b9b128 Issue introduced in 5.0 with commit df2d59a2ab6c9ceac2c4104272fce03493b8f62f and fixed in 6.16-rc1 with commit 405b0d610745fb5e84fc2961d9b960abb9f3d107 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-2025-38153 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/usb/aqc111.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/8c97655275482ef5384ce0501640630a0fc0f6f4 https://git.kernel.org/stable/c/11273279012c922f37cfb4dd95d142803fc07b98 https://git.kernel.org/stable/c/f398d2dfe450ce2c031d10b585448862d74a0501 https://git.kernel.org/stable/c/acb47a40b5e38be03ef659b7bacdddc592ed73b7 https://git.kernel.org/stable/c/60790d287c1a1ced3554d4a87c2f27bf299a932a https://git.kernel.org/stable/c/30a9e834c74e260533b8d0885e3c89f6f32f7993 https://git.kernel.org/stable/c/7c01863b1c47f040d9674171e77789a423b9b128 https://git.kernel.org/stable/c/405b0d610745fb5e84fc2961d9b960abb9f3d107
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