Amazon Linux 2 Security Advisory: ALAS2KERNEL-5.15-2023-013
Advisory Released Date: 2023-02-08
Advisory Updated Date: 2025-10-18
FAQs regarding Amazon Linux ALAS/CVE Severity
In the Linux kernel before 6.1.6, a NULL pointer dereference bug in the traffic control subsystem allows an unprivileged user to trigger a denial of service (system crash) via a crafted traffic control configuration that is set up with "tc qdisc" and "tc class" commands. This affects qdisc_graft in net/sched/sch_api.c. (CVE-2022-47929)
A flaw NULL Pointer Dereference in the Linux kernel NTFS3 driver function attr_punch_hole() was found. A local user could use this flaw to crash the system. (CVE-2022-4842)
In the Linux kernel before 6.1.3, fs/ntfs3/inode.c does not validate the attribute name offset. An unhandled page fault may occur. (CVE-2022-48424)
In the Linux kernel, the following vulnerability has been resolved:
efi: fix NULL-deref in init error path (CVE-2022-48879)
In the Linux kernel, the following vulnerability has been resolved:
sched/core: Fix use-after-free bug in dup_user_cpus_ptr() (CVE-2022-48892)
In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: Validate BOOT record_size (CVE-2022-50262)
In the Linux kernel, the following vulnerability has been resolved:
pnode: terminate at peers of source (CVE-2022-50280)
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix delayed allocation bug in ext4_clu_mapped for bigalloc + inline (CVE-2022-50286)
In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix extent map use-after-free when handling missing device in read_one_chunk (CVE-2022-50300)
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix potential out of bound read in ext4_fc_replay_scan() (CVE-2022-50306)
In the Linux kernel, the following vulnerability has been resolved:
block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq (CVE-2022-50329)
In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: Add null pointer check to attr_load_runs_vcn (CVE-2022-50336)
In the Linux kernel, the following vulnerability has been resolved:
cifs: fix oops during encryption (CVE-2022-50341)
In the Linux kernel, the following vulnerability has been resolved:
ext4: init quota for 'old.inode' in 'ext4_rename' (CVE-2022-50346)
In the Linux kernel, the following vulnerability has been resolved:
md: fix a crash in mempool_free (CVE-2022-50381)
In the Linux kernel, the following vulnerability has been resolved:
nvme: fix multipath crash caused by flush request when blktrace is enabled (CVE-2022-50388)
In the Linux kernel, the following vulnerability has been resolved:
tpm: tpm_crb: Add the missed acpi_put_table() to fix memory leak (CVE-2022-50389)
In the Linux kernel, the following vulnerability has been resolved:
net: sched: fix memory leak in tcindex_set_parms (CVE-2022-50396)
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix off-by-one errors in fast-commit block filling (CVE-2022-50428)
In the Linux kernel, the following vulnerability has been resolved:
ext4: don't set up encryption key during jbd2 transaction (CVE-2022-50436)
In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: Validate buffer length while parsing index (CVE-2022-50442)
In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: Fix memory leak on ntfs_fill_super() error path (CVE-2022-50451)
In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix resolving backrefs for inline extent followed by prealloc (CVE-2022-50456)
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix leaking uninitialized memory in fast-commit journal (CVE-2022-50465)
In the Linux kernel, the following vulnerability has been resolved:
cpufreq: Init completion before kobject_init_and_add() (CVE-2022-50473)
In the Linux kernel, the following vulnerability has been resolved:
ext4: add EXT4_IGET_BAD flag to prevent unexpected bad inode (CVE-2022-50485)
In the Linux kernel, the following vulnerability has been resolved:
dm cache: Fix UAF in destroy() (CVE-2022-50496)
In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: Validate data run offset (CVE-2022-50507)
In the Linux kernel, the following vulnerability has been resolved:
dm thin: Use last transaction's pmd->root when commit failed (CVE-2022-50534)
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix uninititialized value in 'ext4_evict_inode' (CVE-2022-50546)
In the Linux kernel, the following vulnerability has been resolved:
dm thin: Fix ABBA deadlock between shrink_slab and dm_pool_abort_metadata (CVE-2022-50549)
The Linux kernel does not correctly mitigate SMT attacks, as discovered through a strange pattern in the kernel API using STIBP as a mitigation, leaving the process exposed for a short period of time after a syscall. The kernel also does not issue an IBPB immediately during the syscall. (CVE-2023-0045)
A buffer overflow vulnerability was found in the Netfilter subsystem in the Linux Kernel. This issue could allow the leakage of both stack and heap addresses, and potentially allow Local Privilege Escalation to the root user via arbitrary code execution. (CVE-2023-0179)
A NULL pointer dereference flaw was found in rawv6_push_pending_frames in net/ipv6/raw.c in the network subcomponent in the Linux kernel. This flaw causes the system to crash. (CVE-2023-0394)
Detected a few exploitable gadgets that could leak secret memory through a side-channel such as MDS as well as insufficient hardening of the usercopy functions against spectre-v1. (CVE-2023-0459)
There is a use-after-free vulnerability in the Linux Kernel which can be exploited to achieve local privilege escalation. To reach the vulnerability kernel configuration flag CONFIG_TLS or CONFIG_XFRM_ESPINTCP has to be configured, but the operation does not require any privilege.
There is a use-after-free bug of icsk_ulp_data of a struct inet_connection_sock.
When CONFIG_TLS is enabled, user can install a tls context (struct tls_context) on a connected tcp socket. The context is not cleared if this socket is disconnected and reused as a listener. If a new socket is created from the listener, the context is inherited and vulnerable.
The setsockopt TCP_ULP operation does not require any privilege.
We recommend upgrading past commit 2c02d41d71f90a5168391b6a5f2954112ba2307c (CVE-2023-0461)
cbq_classify in net/sched/sch_cbq.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service (slab-out-of-bounds read) because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classification results). (CVE-2023-23454)
atm_tc_enqueue in net/sched/sch_atm.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classification results). (CVE-2023-23455)
In the Linux kernel 6.0.8, there is a use-after-free in run_unpack in fs/ntfs3/run.c, related to a difference between NTFS sector size and media sector size. (CVE-2023-26544)
In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix race between quota rescan and disable leading to NULL pointer deref (CVE-2023-52896)
In the Linux kernel, the following vulnerability has been resolved:
xhci: Fix null pointer dereference when host dies (CVE-2023-52898)
In the Linux kernel, the following vulnerability has been resolved:
usb: xhci: Check endpoint is valid before dereferencing it (CVE-2023-52901)
In the Linux kernel, the following vulnerability has been resolved:
io_uring: lock overflowing for IOPOLL (CVE-2023-52903)
In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_mpls: Fix warning during failed attribute validation (CVE-2023-52906)
In the Linux kernel, the following vulnerability has been resolved:
iommu/iova: Fix alloc iova overflows issue (CVE-2023-52910)
In the Linux kernel, the following vulnerability has been resolved:
netfilter: ipset: Fix overflow before widen in the bitmap_ip_create() function. (CVE-2023-53032)
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nft_payload: incorrect arithmetics when fetching VLAN header bits (CVE-2023-53033)
In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: don't hold ni_lock when calling truncate_setsize() (CVE-2023-53163)
In the Linux kernel, the following vulnerability has been resolved:
netfilter: ipset: Rework long task execution when adding/deleting entries (CVE-2023-53549)
Affected Packages:
kernel
Note:
This advisory is applicable to Amazon Linux 2 - Kernel-5.15 Extra. Visit this page to learn more about Amazon Linux 2 (AL2) Extras and this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update kernel or yum update --advisory ALAS2KERNEL-5.15-2023-013 to update your system.
aarch64:
kernel-5.15.90-54.138.amzn2.aarch64
kernel-headers-5.15.90-54.138.amzn2.aarch64
kernel-debuginfo-common-aarch64-5.15.90-54.138.amzn2.aarch64
perf-5.15.90-54.138.amzn2.aarch64
perf-debuginfo-5.15.90-54.138.amzn2.aarch64
python-perf-5.15.90-54.138.amzn2.aarch64
python-perf-debuginfo-5.15.90-54.138.amzn2.aarch64
kernel-tools-5.15.90-54.138.amzn2.aarch64
kernel-tools-devel-5.15.90-54.138.amzn2.aarch64
kernel-tools-debuginfo-5.15.90-54.138.amzn2.aarch64
bpftool-5.15.90-54.138.amzn2.aarch64
bpftool-debuginfo-5.15.90-54.138.amzn2.aarch64
kernel-devel-5.15.90-54.138.amzn2.aarch64
kernel-debuginfo-5.15.90-54.138.amzn2.aarch64
kernel-livepatch-5.15.90-54.138-1.0-0.amzn2.aarch64
i686:
kernel-headers-5.15.90-54.138.amzn2.i686
src:
kernel-5.15.90-54.138.amzn2.src
x86_64:
kernel-5.15.90-54.138.amzn2.x86_64
kernel-headers-5.15.90-54.138.amzn2.x86_64
kernel-debuginfo-common-x86_64-5.15.90-54.138.amzn2.x86_64
perf-5.15.90-54.138.amzn2.x86_64
perf-debuginfo-5.15.90-54.138.amzn2.x86_64
python-perf-5.15.90-54.138.amzn2.x86_64
python-perf-debuginfo-5.15.90-54.138.amzn2.x86_64
kernel-tools-5.15.90-54.138.amzn2.x86_64
kernel-tools-devel-5.15.90-54.138.amzn2.x86_64
kernel-tools-debuginfo-5.15.90-54.138.amzn2.x86_64
bpftool-5.15.90-54.138.amzn2.x86_64
bpftool-debuginfo-5.15.90-54.138.amzn2.x86_64
kernel-devel-5.15.90-54.138.amzn2.x86_64
kernel-debuginfo-5.15.90-54.138.amzn2.x86_64
kernel-livepatch-5.15.90-54.138-1.0-0.amzn2.x86_64
2025-10-18: CVE-2022-50534 was added to this advisory.
2025-10-18: CVE-2022-50546 was added to this advisory.
2025-10-18: CVE-2022-50442 was added to this advisory.
2025-10-18: CVE-2022-50456 was added to this advisory.
2025-10-18: CVE-2022-50507 was added to this advisory.
2025-10-18: CVE-2022-50496 was added to this advisory.
2025-10-18: CVE-2022-50473 was added to this advisory.
2025-10-18: CVE-2022-50428 was added to this advisory.
2025-10-18: CVE-2022-50465 was added to this advisory.
2025-10-18: CVE-2022-50451 was added to this advisory.
2025-10-18: CVE-2022-50485 was added to this advisory.
2025-10-18: CVE-2023-53549 was added to this advisory.
2025-10-18: CVE-2022-50549 was added to this advisory.
2025-10-08: CVE-2022-50436 was added to this advisory.
2025-10-02: CVE-2022-50329 was added to this advisory.
2025-10-02: CVE-2023-52901 was added to this advisory.
2025-10-02: CVE-2022-50300 was added to this advisory.
2025-10-02: CVE-2022-50396 was added to this advisory.
2025-10-02: CVE-2022-50388 was added to this advisory.
2025-10-02: CVE-2022-50381 was added to this advisory.
2025-10-02: CVE-2022-48879 was added to this advisory.
2025-10-02: CVE-2023-52910 was added to this advisory.
2025-10-02: CVE-2022-50389 was added to this advisory.
2025-10-02: CVE-2023-52896 was added to this advisory.
2025-10-02: CVE-2023-52898 was added to this advisory.
2025-10-02: CVE-2023-52903 was added to this advisory.
2025-10-02: CVE-2023-53163 was added to this advisory.
2025-10-02: CVE-2022-50262 was added to this advisory.
2025-10-02: CVE-2022-50336 was added to this advisory.
2025-10-02: CVE-2022-50286 was added to this advisory.
2025-09-22: CVE-2022-50341 was added to this advisory.
2025-09-22: CVE-2022-50280 was added to this advisory.
2025-09-22: CVE-2022-50346 was added to this advisory.
2025-09-22: CVE-2022-50306 was added to this advisory.
2025-05-21: CVE-2023-53032 was added to this advisory.
2025-05-21: CVE-2023-53033 was added to this advisory.
2025-03-13: CVE-2023-52906 was added to this advisory.
2024-09-26: CVE-2022-48892 was added to this advisory.
2024-04-10: CVE-2023-0461 was added to this advisory.