Amazon Linux 2 Security Advisory: ALAS2-2023-1932
Advisory Released Date: 2023-02-07
Advisory Updated Date: 2025-10-18
FAQs regarding Amazon Linux ALAS/CVE Severity
Guests can trigger NIC interface reset/abort/crash via netback It is possible for a guest to trigger a NIC interface reset/abort/crash in a Linux based network backend by sending certain kinds of packets. It appears to be an (unwritten?) assumption in the rest of the Linux network stack that packet protocol headers are all contained within the linear section of the SKB and some NICs behave badly if this is not the case. This has been reported to occur with Cisco (enic) and Broadcom NetXtrem II BCM5780 (bnx2x) though it may be an issue with other NICs/drivers as well. In case the frontend is sending requests with split headers, netback will forward those violating above mentioned assumption to the networking core, resulting in said misbehavior. (CVE-2022-3643)
Guests can trigger deadlock in Linux netback driver T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] The patch for XSA-392 introduced another issue which might result in a deadlock when trying to free the SKB of a packet dropped due to the XSA-392 handling (CVE-2022-42328). Additionally when dropping packages for other reasons the same deadlock could occur in case of netpoll being active for the interface the xen-netback driver is connected to (CVE-2022-42329). (CVE-2022-42328)
Guests can trigger deadlock in Linux netback driver T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] The patch for XSA-392 introduced another issue which might result in a deadlock when trying to free the SKB of a packet dropped due to the XSA-392 handling (CVE-2022-42328). Additionally when dropping packages for other reasons the same deadlock could occur in case of netpoll being active for the interface the xen-netback driver is connected to (CVE-2022-42329). (CVE-2022-42329)
An issue was discovered in the Linux kernel through 6.0.10. l2cap_config_req in net/bluetooth/l2cap_core.c has an integer wraparound via L2CAP_CONF_REQ packets. (CVE-2022-45934)
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)
In the Linux kernel, the following vulnerability has been resolved:
udf: Fix preallocation discarding at indirect extent boundary (CVE-2022-48946)
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: L2CAP: Fix u8 overflow (CVE-2022-48947)
In the Linux kernel, the following vulnerability has been resolved:
igb: Initialize mailbox message for VF reset (CVE-2022-48949)
In the Linux kernel, the following vulnerability has been resolved:
ipv6: avoid use-after-free in ip6_fragment() (CVE-2022-48956)
In the Linux kernel, the following vulnerability has been resolved:
mac802154: fix missing INIT_LIST_HEAD in ieee802154_if_add() (CVE-2022-48972)
In the Linux kernel, the following vulnerability has been resolved:
HID: core: fix shift-out-of-bounds in hid_report_raw_event (CVE-2022-48978)
In the Linux kernel, the following vulnerability has been resolved:
media: v4l2-dv-timings.c: fix too strict blanking sanity checks (CVE-2022-48987)
In the Linux kernel, the following vulnerability has been resolved:
memcg: fix possible use-after-free in memcg_write_event_control() (CVE-2022-48988)
In the Linux kernel, the following vulnerability has been resolved:
mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths (CVE-2022-48991)
In the Linux kernel, the following vulnerability has been resolved:
mmc: vub300: fix return value check of mmc_add_host() (CVE-2022-50251)
In the Linux kernel, the following vulnerability has been resolved:
igb: Do not free q_vector unless new one was allocated (CVE-2022-50252)
In the Linux kernel, the following vulnerability has been resolved:
bpf: make sure skb->len != 0 when redirecting to a tunneling device (CVE-2022-50253)
In the Linux kernel, the following vulnerability has been resolved:
drm/radeon: Add the missed acpi_put_table() to fix memory leak (CVE-2022-50275)
In the Linux kernel, the following vulnerability has been resolved:
PNP: fix name memory leak in pnp_alloc_dev() (CVE-2022-50278)
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:
chardev: fix error handling in cdev_device_add() (CVE-2022-50282)
In the Linux kernel, the following vulnerability has been resolved:
fs: jfs: fix shift-out-of-bounds in dbDiscardAG (CVE-2022-50333)
In the Linux kernel, the following vulnerability has been resolved:
rapidio: fix possible name leaks when rio_add_device() fails (CVE-2022-50343)
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:
misc: tifm: fix possible memory leak in tifm_7xx1_switch_media() (CVE-2022-50349)
In the Linux kernel, the following vulnerability has been resolved:
skbuff: Account for tail adjustment during pull operations (CVE-2022-50365)
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:
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:
nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure (CVE-2022-50401)
In the Linux kernel, the following vulnerability has been resolved:
net/tunnel: wait until all sk_user_data reader finish before releasing the sock (CVE-2022-50405)
In the Linux kernel, the following vulnerability has been resolved:
ACPICA: Fix error code path in acpi_ds_call_control_method() (CVE-2022-50411)
In the Linux kernel, the following vulnerability has been resolved:
scsi: fcoe: Fix transport not deattached when fcoe_if_init() fails (CVE-2022-50414)
In the Linux kernel, the following vulnerability has been resolved:
ACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage() (CVE-2022-50423)
In the Linux kernel, the following vulnerability has been resolved:
mmc: vub300: fix warning - do not call blocking ops when !TASK_RUNNING (CVE-2022-50430)
In the Linux kernel, the following vulnerability has been resolved:
blk-mq: fix possible memleak when register 'hctx' failed (CVE-2022-50434)
In the Linux kernel, the following vulnerability has been resolved:
MIPS: vpe-mt: fix possible memory leak while module exiting (CVE-2022-50462)
In the Linux kernel, the following vulnerability has been resolved:
macintosh: fix possible memory leak in macio_add_one_device() (CVE-2022-50474)
In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix shift-out-of-bounds/overflow in nilfs_sb2_bad_offset() (CVE-2022-50478)
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:
binfmt_misc: fix shift-out-of-bounds in check_special_flags (CVE-2022-50497)
In the Linux kernel, the following vulnerability has been resolved:
mtd: lpddr2_nvm: Fix possible null-ptr-deref (CVE-2022-50503)
In the Linux kernel, the following vulnerability has been resolved:
iommu/amd: Fix pci device refcount leak in ppr_notifier() (CVE-2022-50505)
In the Linux kernel, the following vulnerability has been resolved:
drm/radeon: Fix PCI device refcount leak in radeon_atrm_get_bios() (CVE-2022-50520)
In the Linux kernel, the following vulnerability has been resolved:
dm thin: Use last transaction's pmd->root when commit failed (CVE-2022-50534)
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 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)
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, the following vulnerability has been resolved:
nilfs2: fix general protection fault in nilfs_btree_insert() (CVE-2023-52900)
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:
netfilter: ipset: Fix overflow before widen in the bitmap_ip_create() function. (CVE-2023-53032)
Affected Packages:
kernel
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update kernel or yum update --advisory ALAS2-2023-1932 to update your system.
aarch64:
kernel-4.14.304-226.531.amzn2.aarch64
kernel-headers-4.14.304-226.531.amzn2.aarch64
kernel-debuginfo-common-aarch64-4.14.304-226.531.amzn2.aarch64
perf-4.14.304-226.531.amzn2.aarch64
perf-debuginfo-4.14.304-226.531.amzn2.aarch64
python-perf-4.14.304-226.531.amzn2.aarch64
python-perf-debuginfo-4.14.304-226.531.amzn2.aarch64
kernel-tools-4.14.304-226.531.amzn2.aarch64
kernel-tools-devel-4.14.304-226.531.amzn2.aarch64
kernel-tools-debuginfo-4.14.304-226.531.amzn2.aarch64
kernel-devel-4.14.304-226.531.amzn2.aarch64
kernel-debuginfo-4.14.304-226.531.amzn2.aarch64
i686:
kernel-headers-4.14.304-226.531.amzn2.i686
src:
kernel-4.14.304-226.531.amzn2.src
x86_64:
kernel-4.14.304-226.531.amzn2.x86_64
kernel-headers-4.14.304-226.531.amzn2.x86_64
kernel-debuginfo-common-x86_64-4.14.304-226.531.amzn2.x86_64
perf-4.14.304-226.531.amzn2.x86_64
perf-debuginfo-4.14.304-226.531.amzn2.x86_64
python-perf-4.14.304-226.531.amzn2.x86_64
python-perf-debuginfo-4.14.304-226.531.amzn2.x86_64
kernel-tools-4.14.304-226.531.amzn2.x86_64
kernel-tools-devel-4.14.304-226.531.amzn2.x86_64
kernel-tools-debuginfo-4.14.304-226.531.amzn2.x86_64
kernel-devel-4.14.304-226.531.amzn2.x86_64
kernel-debuginfo-4.14.304-226.531.amzn2.x86_64
kernel-livepatch-4.14.304-226.531-1.0-0.amzn2.x86_64
2025-10-18: CVE-2022-50462 was added to this advisory.
2025-10-18: CVE-2022-50520 was added to this advisory.
2025-10-18: CVE-2022-50503 was added to this advisory.
2025-10-18: CVE-2022-50505 was added to this advisory.
2025-10-18: CVE-2022-50474 was added to this advisory.
2025-10-18: CVE-2022-50423 was added to this advisory.
2025-10-18: CVE-2022-50478 was added to this advisory.
2025-10-18: CVE-2022-50496 was added to this advisory.
2025-10-18: CVE-2022-50434 was added to this advisory.
2025-10-18: CVE-2022-50497 was added to this advisory.
2025-10-18: CVE-2022-50534 was added to this advisory.
2025-10-08: CVE-2022-50430 was added to this advisory.
2025-10-02: CVE-2022-50253 was added to this advisory.
2025-10-02: CVE-2022-50251 was added to this advisory.
2025-10-02: CVE-2022-50349 was added to this advisory.
2025-10-02: CVE-2022-50405 was added to this advisory.
2025-10-02: CVE-2022-50365 was added to this advisory.
2025-10-02: CVE-2022-50343 was added to this advisory.
2025-10-02: CVE-2022-50381 was added to this advisory.
2025-10-02: CVE-2022-50411 was added to this advisory.
2025-10-02: CVE-2023-52901 was added to this advisory.
2025-10-02: CVE-2022-50389 was added to this advisory.
2025-10-02: CVE-2022-50278 was added to this advisory.
2025-10-02: CVE-2022-50401 was added to this advisory.
2025-10-02: CVE-2022-50414 was added to this advisory.
2025-10-02: CVE-2022-50275 was added to this advisory.
2025-10-02: CVE-2023-52900 was added to this advisory.
2025-09-23: CVE-2022-50282 was added to this advisory.
2025-09-23: CVE-2022-50346 was added to this advisory.
2025-09-23: CVE-2022-50252 was added to this advisory.
2025-09-23: CVE-2022-50333 was added to this advisory.
2025-09-23: CVE-2022-50280 was added to this advisory.
2025-05-19: CVE-2023-53032 was added to this advisory.
2025-03-10: CVE-2022-48987 was added to this advisory.
2025-03-10: CVE-2022-48947 was added to this advisory.
2025-03-10: CVE-2022-48972 was added to this advisory.
2025-03-10: CVE-2022-48978 was added to this advisory.
2025-03-10: CVE-2022-48946 was added to this advisory.
2025-03-10: CVE-2022-48949 was added to this advisory.
2025-01-16: CVE-2022-48988 was added to this advisory.
2025-01-16: CVE-2022-48956 was added to this advisory.
2025-01-16: CVE-2022-48991 was added to this advisory.
2024-04-11: CVE-2023-0461 was added to this advisory.