An update for kernel is now available for openEuler-22.03-LTS-SP3 Security Advisory openeuler-release@openeuler.org openEuler release SIG openEuler-HotPatchSA-2024-1027 Final 1.0 1.0 2024-08-16 Initial 2024-08-16 2024-08-16 openEuler HotPatchSA Tool V1.0 2024-08-16 kernel security update An update for kernel is now available for openEuler-22.03-LTS-SP3 The Linux Kernel, the operating system core itself. Security Fix(es): In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stackmap overflow check on 32-bit arches The stackmap code relies on roundup_pow_of_two() to compute the number of hash buckets, and contains an overflow check by checking if the resulting value is 0. However, on 32-bit arches, the roundup code itself can overflow by doing a 32-bit left-shift of an unsigned long value, which is undefined behaviour, so it is not guaranteed to truncate neatly. This was triggered by syzbot on the DEVMAP_HASH type, which contains the same check, copied from the hashtab code. The commit in the fixes tag actually attempted to fix this, but the fix did not account for the UB, so the fix only works on CPUs where an overflow does result in a neat truncation to zero, which is not guaranteed. Checking the value before rounding does not have this problem.(CVE-2024-26883) In the Linux kernel, the following vulnerability has been resolved: USB: core: Fix deadlock in usb_deauthorize_interface() Among the attribute file callback routines in drivers/usb/core/sysfs.c, the interface_authorized_store() function is the only one which acquires a device lock on an ancestor device: It calls usb_deauthorize_interface(), which locks the interface's parent USB device. The will lead to deadlock if another process already owns that lock and tries to remove the interface, whether through a configuration change or because the device has been disconnected. As part of the removal procedure, device_del() waits for all ongoing sysfs attribute callbacks to complete. But usb_deauthorize_interface() can't complete until the device lock has been released, and the lock won't be released until the removal has finished. The mechanism provided by sysfs to prevent this kind of deadlock is to use the sysfs_break_active_protection() function, which tells sysfs not to wait for the attribute callback. Reported-and-tested by: Yue Sun <samsun1006219@gmail.com> Reported by: xingwei lee <xrivendell7@gmail.com>(CVE-2024-26934) An update for kernel is now available for openEuler-22.03-LTS-SP3. openEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. High kernel https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-HotPatchSA-2024-1027 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2024-26883 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2024-26934 https://nvd.nist.gov/vuln/detail/CVE-2024-26883 https://nvd.nist.gov/vuln/detail/CVE-2024-26934 openEuler-22.03-LTS-SP3 kernel-5.10.0-182.0.0.95.oe2203sp3-ACC-1-3.src.rpm patch-kernel-5.10.0-182.0.0.95.oe2203sp3-ACC-1-3.x86_64.rpm patch-kernel-5.10.0-182.0.0.95.oe2203sp3-ACC-1-3.aarch64.rpm In the Linux kernel, the following vulnerability has been resolved:bpf: Fix stackmap overflow check on 32-bit archesThe stackmap code relies on roundup_pow_of_two() to compute the numberof hash buckets, and contains an overflow check by checking if theresulting value is 0. However, on 32-bit arches, the roundup code itselfcan overflow by doing a 32-bit left-shift of an unsigned long value,which is undefined behaviour, so it is not guaranteed to truncateneatly. This was triggered by syzbot on the DEVMAP_HASH type, whichcontains the same check, copied from the hashtab code.The commit in the fixes tag actually attempted to fix this, but the fixdid not account for the UB, so the fix only works on CPUs where anoverflow does result in a neat truncation to zero, which is notguaranteed. Checking the value before rounding does not have thisproblem. 2024-08-16 CVE-2024-26883 openEuler-22.03-LTS-SP3 High 7.8 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H kernel security update 2024-08-16 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-HotPatchSA-2024-1027 In the Linux kernel, the following vulnerability has been resolved:USB: core: Fix deadlock in usb_deauthorize_interface()Among the attribute file callback routines indrivers/usb/core/sysfs.c, the interface_authorized_store() function isthe only one which acquires a device lock on an ancestor device: Itcalls usb_deauthorize_interface(), which locks the interface s parentUSB device.The will lead to deadlock if another process already owns that lockand tries to remove the interface, whether through a configurationchange or because the device has been disconnected. As part of theremoval procedure, device_del() waits for all ongoing sysfs attributecallbacks to complete. But usb_deauthorize_interface() can t completeuntil the device lock has been released, and the lock won t bereleased until the removal has finished.The mechanism provided by sysfs to prevent this kind of deadlock isto use the sysfs_break_active_protection() function, which tells sysfsnot to wait for the attribute callback.Reported-and-tested by: Yue Sun <samsun1006219@gmail.com>Reported by: xingwei lee <xrivendell7@gmail.com> 2024-08-16 CVE-2024-26934 openEuler-22.03-LTS-SP3 High 7.8 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H kernel security update 2024-08-16 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-HotPatchSA-2024-1027