In the Linux kernel, the following vulnerability has been resolved: perf bpf: Avoid memory leak from perf_env__insert_btf() perf_env__insert_btf() doesn't insert if a duplicate BTF id is encountered and this causes a memory leak. Modify the function to return a success/error value and then free the memory if insertion didn't happen. v2. Adds a return -1 when the insertion error occurs in perf_env__fetch_btf. This doesn't affect anything as the result is never checked.

The version of kernel installed on the remote host is prior to 5.4.162-86.275. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2022-010 advisory.

    2024-08-27: CVE-2021-47190 was added to this advisory.

    2024-08-27: CVE-2021-47184 was added to this advisory.

    2024-08-27: CVE-2021-47185 was added to this advisory.

    2024-08-27: CVE-2021-47192 was added to this advisory.

    2024-08-27: CVE-2021-47203 was added to this advisory.

    2024-08-27: CVE-2021-47201 was added to this advisory.

    2024-08-27: CVE-2021-47189 was added to this advisory.

    2024-08-27: CVE-2021-47217 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 vulnerability was found in Linux kernel, where a use-after-frees in nouveau's postclose() handler could     happen if removing device (that is not common to remove video card physically without power-off, but same     happens if unbind the driver). (CVE-2020-27820)

    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 race condition was found in the Linux kernel's ebpf verifier between bpf_map_update_elem and     bpf_map_freeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special     privilege (cap_sys_admin or cap_bpf) can modify the frozen mapped address space. (CVE-2021-4001)

    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:

    perf bpf: Avoid memory leak from perf_env__insert_btf() (CVE-2021-47190)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: core: sysfs: Fix hang when device state is set via sysfs (CVE-2021-47192)

    In the Linux kernel, the following vulnerability has been resolved:

    iavf: free q_vectors before queues in iavf_disable_vf (CVE-2021-47201)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq() (CVE-2021-47203)

    In the Linux kernel, the following vulnerability has been resolved:

    x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails (CVE-2021-47217)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 5.10.82-83.359. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2024-049 advisory.

    2025-01-31: CVE-2021-47483 was added to this advisory.

    2025-01-31: CVE-2021-47459 was added to this advisory.

    2024-08-27: CVE-2021-47190 was added to this advisory.

    2024-08-27: CVE-2021-47184 was added to this advisory.

    2024-08-27: CVE-2021-47185 was added to this advisory.

    2024-08-27: CVE-2021-47219 was added to this advisory.

    2024-08-27: CVE-2021-47192 was added to this advisory.

    2024-08-27: CVE-2021-47202 was added to this advisory.

    2024-08-27: CVE-2021-47218 was added to this advisory.

    2024-08-27: CVE-2021-47191 was added to this advisory.

    2024-08-27: CVE-2021-47203 was added to this advisory.

    2024-08-27: CVE-2021-47201 was added to this advisory.

    2024-08-27: CVE-2021-47189 was added to this advisory.

    2024-08-27: CVE-2021-47217 was added to this advisory.

    2024-08-27: CVE-2021-47197 was added to this advisory.

    2024-08-01: CVE-2021-47186 was added to this advisory.

    2024-04-30: CVE-2023-0047 was removed from this advisory (rejected).

    2024-02-15: CVE-2021-4002 was added to this advisory.

    2024-02-15: CVE-2020-27820 was added to this advisory.

    2024-02-15: CVE-2021-3640 was added to this advisory.

    2024-02-15: CVE-2021-4001 was added to this advisory.

    2024-02-15: CVE-2021-3772 was added to this advisory.

    2024-02-15: CVE-2021-42327 was added to this advisory.

    A vulnerability was found in Linux kernel, where a use-after-frees in nouveau's postclose() handler could     happen if removing device (that is not common to remove video card physically without power-off, but same     happens if unbind the driver). (CVE-2020-27820)

    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 race condition was found in the Linux kernel's ebpf verifier between bpf_map_update_elem and     bpf_map_freeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special     privilege (cap_sys_admin or cap_bpf) can modify the frozen mapped address space. (CVE-2021-4001)

    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)

    A flaw heap buffer overflow in the Linux kernel's AMD Radeon graphics card driver was found in the way     user writes some malicious data to the AMD GPU Display Driver Debug Filesystem (to the VGA sub-directory     of the /sys/kernel/debug/ directory). A local user could use this flaw to crash the system or escalate     their privileges on the system. (CVE-2021-42327)

    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:

    tipc: check for null after calling kmemdup (CVE-2021-47186)

    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:

    perf bpf: Avoid memory leak from perf_env__insert_btf() (CVE-2021-47190)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: scsi_debug: Fix out-of-bound read in resp_readcap16() (CVE-2021-47191)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: core: sysfs: Fix hang when device state is set via sysfs (CVE-2021-47192)

    In the Linux kernel, the following vulnerability has been resolved:

    net/mlx5e: nullify cq->dbg pointer in mlx5_debug_cq_remove() (CVE-2021-47197)

    In the Linux kernel, the following vulnerability has been resolved:

    iavf: free q_vectors before queues in iavf_disable_vf (CVE-2021-47201)

    In the Linux kernel, the following vulnerability has been resolved:

    thermal: Fix NULL pointer dereferences in of_thermal_ functions (CVE-2021-47202)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq() (CVE-2021-47203)

    In the Linux kernel, the following vulnerability has been resolved:

    x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails (CVE-2021-47217)

    In the Linux kernel, the following vulnerability has been resolved:

    selinux: fix NULL-pointer dereference when hashtab allocation fails (CVE-2021-47218)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: scsi_debug: Fix out-of-bound read in resp_report_tgtpgs() (CVE-2021-47219)

    In the Linux kernel, the following vulnerability has been resolved:

    can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv (CVE-2021-47459)

    In the Linux kernel, the following vulnerability has been resolved:

    regmap: Fix possible double-free in regcache_rbtree_exit() (CVE-2021-47483)

    A use-after-free flaw was found in the Linux kernel's Ext4 File System in how a user triggers several file     operations simultaneously with the overlay FS usage. This flaw allows a local user to crash or potentially     escalate their privileges on the system. (CVE-2023-1252)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the linux package has been released.

ID	Name	Product	Family	Severity
190057	Amazon Linux 2 : kernel (ALASKERNEL-5.4-2022-010)	Nessus	Amazon Linux Local Security Checks	high
190033	Amazon Linux 2 : kernel (ALASKERNEL-5.10-2024-049)	Nessus	Amazon Linux Local Security Checks	high
151965	Photon OS 4.0: Linux PHSA-2021-4.0-0065	Nessus	PhotonOS Local Security Checks	critical

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