Amazon Linux 2 Security Advisory: ALAS-2021-1727
Advisory Release Date: 2021-12-08 02:23 Pacific
Advisory Updated Date: 2024-08-14 19:05 Pacific
FAQs regarding Amazon Linux ALAS/CVE Severity
2024-08-14: CVE-2021-47203 was added to this advisory.
2024-08-14: CVE-2021-47184 was added to this advisory.
2024-08-14: CVE-2021-47189 was added to this advisory.
2024-08-14: CVE-2021-47185 was added to this advisory.
2024-04-30: CVE-2023-0047 was removed from this advisory (rejected).
2024-02-01: CVE-2023-0047 was added to this advisory.
A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system. (CVE-2021-3640)
A flaw was found in the Linux SCTP stack. A blind attacker may be able to kill an existing SCTP association through invalid chunks if the attacker knows the IP-addresses and port numbers being used and the attacker can send packets with spoofed IP addresses. (CVE-2021-3772)
A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the memory pages. A local user could use this flaw to get unauthorized access to some data. (CVE-2021-4002)
In the Linux kernel, the following vulnerability has been resolved:
i40e: Fix NULL ptr dereference on VSI filter sync (CVE-2021-47184)
In the Linux kernel, the following vulnerability has been resolved:
tty: tty_buffer: Fix the softlockup issue in flush_to_ldisc (CVE-2021-47185)
In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix memory ordering between normal and ordered work functions (CVE-2021-47189)
In the Linux kernel, the following vulnerability has been resolved:
scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq() (CVE-2021-47203)
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 to update your system.
aarch64:
kernel-4.14.256-197.484.amzn2.aarch64
kernel-headers-4.14.256-197.484.amzn2.aarch64
kernel-debuginfo-common-aarch64-4.14.256-197.484.amzn2.aarch64
perf-4.14.256-197.484.amzn2.aarch64
perf-debuginfo-4.14.256-197.484.amzn2.aarch64
python-perf-4.14.256-197.484.amzn2.aarch64
python-perf-debuginfo-4.14.256-197.484.amzn2.aarch64
kernel-tools-4.14.256-197.484.amzn2.aarch64
kernel-tools-devel-4.14.256-197.484.amzn2.aarch64
kernel-tools-debuginfo-4.14.256-197.484.amzn2.aarch64
kernel-devel-4.14.256-197.484.amzn2.aarch64
kernel-debuginfo-4.14.256-197.484.amzn2.aarch64
i686:
kernel-headers-4.14.256-197.484.amzn2.i686
src:
kernel-4.14.256-197.484.amzn2.src
x86_64:
kernel-4.14.256-197.484.amzn2.x86_64
kernel-headers-4.14.256-197.484.amzn2.x86_64
kernel-debuginfo-common-x86_64-4.14.256-197.484.amzn2.x86_64
perf-4.14.256-197.484.amzn2.x86_64
perf-debuginfo-4.14.256-197.484.amzn2.x86_64
python-perf-4.14.256-197.484.amzn2.x86_64
python-perf-debuginfo-4.14.256-197.484.amzn2.x86_64
kernel-tools-4.14.256-197.484.amzn2.x86_64
kernel-tools-devel-4.14.256-197.484.amzn2.x86_64
kernel-tools-debuginfo-4.14.256-197.484.amzn2.x86_64
kernel-devel-4.14.256-197.484.amzn2.x86_64
kernel-debuginfo-4.14.256-197.484.amzn2.x86_64
kernel-livepatch-4.14.256-197.484-1.0-0.amzn2.x86_64