SB2026083034 - openEuler 24.03 LTS SP1 update for kernel
Published: August 30, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2026-46021)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in thermal_set_governor() and thermal_zone_device_unregister() when handling concurrent governor updates via sysfs during thermal zone unregistration. A local user can trigger a governor update race to cause a denial of service.
The issue can occur if thermal_zone_device_register_with_trips() fails after adding a thermal governor to the thermal zone being registered.
2) Out-of-bounds read (CVE-ID: CVE-2026-46033)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an out-of-bounds access in the authencesn ESN encrypt/decrypt paths when handling AF_ALG requests with a too-short authentication tag inherited from an ahash digest size of 1 to 3 bytes. A local user can select an ahash with a digest size of 1 to 3 bytes and trigger ESN tail handling to cause a denial of service.
3) Use-after-free (CVE-ID: CVE-2026-46121)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in DAMON sysfs memcg_path file handling when performing concurrent reads and writes through separate open files. A local user can trigger concurrent access to a freed buffer to cause a denial of service.
The issue affects user-driven direct reads and writes, while reads performed during parameter committing are separately synchronized.
4) Race condition (CVE-ID: CVE-2026-53073)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition leading to a null pointer dereference in the Bluetooth hci_ldisc subsystem when processing incoming UART data after device registration fails. A local user can trigger device registration failure and subsequent UART data handling to cause a denial of service.
The issue occurs because protocol-specific receive handlers may be reached after resources have been freed.
5) Out-of-bounds write (CVE-ID: CVE-2026-53148)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause memory corruption.
The vulnerability exists due to an out-of-bounds write in tb_xdp_properties_request() in the thunderbolt xdomain handler when processing a crafted XDomain response from a malicious peer. A remote attacker can send a response with a forged length field to cause memory corruption.
6) Use of uninitialized resource (CVE-ID: CVE-2026-53167)
CWE-ID: CWE-908 - Use of Uninitialized Resource
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to an exposure of uninitialized memory in FUSE_NOTIFY_RETRIEVE in fs/fuse/dev.c when retrieving data from page cache folios. A local user can trigger FUSE_NOTIFY_RETRIEVE on a non-uptodate folio to disclose sensitive information.
This has security impact only on systems that do not enable automatic zero-initialization of page allocations.
7) Improper access control (CVE-ID: CVE-2026-53168)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to improper access control in fuse_notify_store() and fuse_notify_retrieve() when processing FUSE pagecache notification operations on directories. A remote user can issue crafted FUSE_NOTIFY_STORE or FUSE_NOTIFY_RETRIEVE operations on a directory inode to cause a denial of service.
The issue affects directory inodes that use kernel-internal pagecache storage.
8) Heap-based buffer overflow (CVE-ID: CVE-2026-53195)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a heap-based buffer overflow in build_i2c_fw_hdr() in the io_ti USB serial driver when parsing a crafted firmware file. A local user can supply a firmware image with an oversized Length field to cause a denial of service.
The issue arises because the Length field from the firmware image is not validated against the available destination buffer space before copying.
Remediation
Install update from vendor's website.