Home » Linux Kernel: New Security Flaw! Multiple vulnerabilities reported

Linux Kernel: New Security Flaw! Multiple vulnerabilities reported

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Linux Kernel: New Security Flaw!  Multiple vulnerabilities reported

There is a current IT security warning for the Linux kernel. You can find out what vulnerabilities are involved, which products are affected and what you can do here.

The Federal Office for Security in Information Technology (BSI) reported a security advisory for the Linux kernel on February 29, 2024. The report points to several vulnerabilities that make an attack possible. The security vulnerability affects the Linux operating system and the Open Source Linux Kernel product.

The latest manufacturer recommendations regarding updates, workarounds and security patches for this vulnerability can be found here: Linux Security Advisory (As of February 29, 2024). Other useful resources are listed later in this article.

Multiple Linux Kernel Vulnerabilities Reported – Risk: Medium

Risk level: 3 (medium)
CVSS Base Score: 5,3
CVSS Temporal Score: 4,6
Remote attack: No

The Common Vulnerability Scoring System (CVSS) is used to assess the severity of vulnerabilities in computer systems. The CVSS standard makes it possible to compare potential or actual security vulnerabilities based on various metrics in order to better prioritize countermeasures. The attributes “none”, “low”, “medium”, “high” and “critical” are used to determine the severity levels of a vulnerability. The Base Score evaluates the requirements for an attack (including authentication, complexity, privileges, user interaction) and its consequences. The temporal score also takes changes over time in the danger situation into account. The severity of the current vulnerability is classified as “medium” according to the CVSS with a base score of 5.3.

Linux Kernel Bug: Effects of exploiting known vulnerabilities

The kernel represents the core of the Linux operating system.

A local attacker can exploit multiple vulnerabilities in the Linux kernel to cause a denial of service and conduct an unspecified attack.

The vulnerability is identified with the unique CVE (Common Vulnerabilities and Exposures) identification numbers. CVE-2024-26620, CVE-2024-26619, CVE-2024-26618, CVE-2024-26617, CVE-2024-26616, CVE-2024-26615, CVE-2024-26614, CVE-2024-26613, CVE-2024-26612, CVE-2024-26611, CVE-2024-26610, CVE-2024-26609, CVE-2024-26608, CVE-2024-26607, CVE-2023-52498, CVE-2023-52497, CVE-2023-52496, CVE-2023-52495, CVE-2023-52494, CVE-2023-52493, CVE-2023-52492, CVE-2023-52491, CVE-2023-52490, CVE-2023-52489, CVE-2023-52488, CVE-2023-52487, CVE-2023-52485, CVE-2021-47068, CVE-2021-47067, CVE-2021-47066, CVE-2021-47065, CVE-2021-47064, CVE-2021-47063, CVE-2021-47062, CVE-2021-47061, CVE-2021-47060, CVE-2021-47059, CVE-2021-47058, CVE-2021-47057, CVE-2021-47056, CVE-2021-47055, CVE-2021-47054, CVE-2021-47020, CVE-2021-47016 und CVE-2021-46959 traded.

Systems affected by the security gap at a glance

operating system
Linux

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Products
Open Source Linux Kernel (cpe:/o:linux:linux_kernel)

General recommendations for dealing with IT vulnerabilities

Users of the affected applications should keep them up to date. When security gaps become known, manufacturers are required to fix them as quickly as possible by developing a patch or a workaround. If security patches are available, install them promptly. For information, consult the sources listed in the next section. These often contain further information about the latest version of the software in question as well as the availability of security patches or information about workarounds. If you have any further questions or uncertainties, please contact your responsible administrator. IT security managers should regularly check when the manufacturing company makes a new security update available.

Sources of updates, patches and workarounds

Here you will find further links with information about bug reports, security fixes and workarounds.

Linux Security Advisory vom 2024-02-29 (29.02.2024)
For more information, see:

GitHub Advisory GHSA-3659-jjmv-v338 vom 2024-02-29 (29.02.2024)
For more information, see:

GitHub Advisory GHSA-69cq-jw85-57p8 vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2024-26620: s390/vfio-ap: always filter entire AP matrix vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2024-26619: riscv: Fix module loading free order vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2024-26618: arm64/sme: Always exit sme_alloc() early with existing storage vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2024-26617: fs/proc/task_mmu: move mmu notification mechanism inside mm lock vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2024-26616: btrfs: scrub: avoid use-after-free when chunk length is not 64K aligned vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2024-26615: net/smc: fix illegal rmb_desc access in SMC-D connection dump vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2024-26614: tcp: make sure init the accept_queue’s spinlocks once vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2024-26613: net/rds: Fix UBSAN: array-index-out-of-bounds in rds_cmsg_recv vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2024-26612: netfs, fscache: Prevent Oops in fscache_put_cache() vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2024-26611: xsk: fix usage of multi-buffer BPF helpers for ZC XDP vom 2024-02-29 (29.02.2024)
For more information, see:

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CVE-2024-26610: wifi: iwlwifi: fix a memory corruption vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2024-26609: netfilter: nf_tables: reject QUEUE/DROP verdict parameters vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2024-26608: ksmbd: fix global oob in ksmbd_nl_policy vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2023-52498: PM: sleep: Fix possible deadlocks in core system-wide PM code vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2023-52497: erofs: fix lz4 inplace decompression vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2023-52496: mtd: maps: vmu-flash: Fix the (mtd core) switch to ref counters vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2023-52495: soc: qcom: pmic_glink_altmode: fix port sanity check vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2023-52494: bus: mhi: host: Add alignment check for event ring read pointer vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2023-52493: bus: mhi: host: Drop chan lock before queuing buffers vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2023-52492: dmaengine: fix NULL pointer in channel unregistration function vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2023-52491: media: mtk-jpeg: Fix use after free bug due to error path handling in mtk_jpeg_dec_device_run vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2023-52490: mm: migrate: fix getting incorrect page mapping during page migration vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2023-52489: mm/sparsemem: fix race in accessing memory_section->usage vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2023-52488: serial: sc16is7xx: convert from raw to noinc regmap functions for FIFO vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2023-52487: net/mlx5e: Fix peer flow lists handling vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47068: net/nfc: fix use-after-free llcp_sock_bind/connect vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47067: soc/tegra: regulators: Fix locking up when voltage-spread is out of range vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47066: async_xor: increase src_offs when dropping destination page vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47065: rtw88: Fix array overrun in rtw_get_tx_power_params() vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47064: mt76: fix potential DMA mapping leak vom 2024-02-29 (29.02.2024)
For more information, see:

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CVE-2021-47063: drm: bridge/panel: Cleanup connector on bridge detach vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47062: KVM: SVM: Use online_vcpus, not created_vcpus, to iterate over vCPUs vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47061: KVM: Destroy I/O bus devices on unregister failure after sync’ing SRCU vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47060: KVM: Stop looking for coalesced MMIO zones if the bus is destroyed vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47059: crypto: sun8i-ss – fix result memory leak on error path vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47058: regmap: set debugfs_name to NULL after it is freed vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47057: crypto: sun8i-ss – Fix memory leak of object d when dma_iv fails to map vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47056: crypto: qat – ADF_STATUS_PF_RUNNING should be set after adf_dev_init vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47055: mtd: require write permissions for locking and badblock ioctls vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47054: bus: qcom: Put child node before return vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47020: soundwire: stream: fix memory leak in stream config error path vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-47016: m68k: mvme147,mvme16x: Don’t wipe PCC timer config bits vom 2024-02-29 (29.02.2024)
For more information, see:

CVE-2021-46959: spi: Fix use-after-free with devm_spi_alloc_* vom 2024-02-29 (29.02.2024)
For more information, see:

Version history of this security alert

This is the initial version of this IT security notice for the Linux kernel. This text will be updated as updates are announced. You can see the changes made using the version history below.

02/29/2024 – Initial version

+++ Editorial note: This text was generated based on current BSI data and will be updated in a data-driven manner depending on the warning situation. We accept feedback and comments at [email protected]. +++

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Edited by kns

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