nf_tables_newset in net/netfilter/nf_tables_api.c in the Linux kernel before 5.12.13 allows local users to cause a denial of service (NULL pointer dereference and general protection fault) because of the missing initialization for nft_set_elem_expr_alloc. A local user can set a netfilter table expression in their own namespace.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-414514 advisory.

    nf_tables_newset in net/netfilter/nf_tables_api.c in the Linux kernel before 5.12.13 allows local users to     cause a denial of service (NULL pointer dereference and general protection fault) because of the missing     initialization for nft_set_elem_expr_alloc. A local user can set a netfilter table expression in their own     namespace.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - nf_tables_newset in net/netfilter/nf_tables_api.c in the Linux kernel before 5.12.13 allows local users to     cause a denial of service (NULL pointer dereference and general protection fault) because of the missing     initialization for nft_set_elem_expr_alloc. A local user can set a netfilter table expression in their own     namespace. (CVE-2021-46283)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote SUSE Linux SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:0288-1 advisory.

    The SUSE Linux Enterprise 15 SP3 RT kernel was updated to receive various security and bugfixes.

    The following security bugs were fixed:

    - CVE-2021-4083: Fixed race condition in Unix domain socket garbage collection that could lead to read     memory after free (bsc#1193727).
    - CVE-2021-4135: Fixed an information leak in the nsim_bpf_map_alloc function (bsc#1193927).
    - CVE-2021-4149: Fixed improper lock operation in btrfs that allowed users to crash the kernel or deadlock     the system (bsc#1194001).
    - CVE-2021-4197: Fixed a cgroup issue where lower privileged processes could write to fds of lower     privileged ones that could lead to privilege escalation (bsc#1194302).
    - CVE-2021-4202: Fixed race condition in nci_request() that could cause use-after-free (bsc#1194529).
    - CVE-2021-44733: Fixed a use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux     kernel that occured because of a race condition in tee_shm_get_from_id during an attempt to free a shared     memory object (bnc#1193767).
    - CVE-2021-46283: Fixed missing initialization in nf_tables_newset in net/netfilter/nf_tables_api.c that     could cause a denial of service (bnc#1194518).
    - CVE-2022-0185: Incorrect param length parsing in legacy_parse_param which could have led to a local     privilege escalation (bsc#1194517).
    - CVE-2022-0322: Fixed a denial of service in SCTP sctp_addto_chunk (bsc#1194985).


Tenable has extracted the preceding description block directly from the SUSE 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 remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2022:0198-1 advisory.

  - A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket     file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race     condition. This flaw allows a local user to crash the system or escalate their privileges on the system.
    This flaw affects Linux kernel versions prior to 5.16-rc4. (CVE-2021-4083)

  - In the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information     leak because of certain use of a hash table which, although big, doesn't properly consider that IPv6-based     attackers can typically choose among many IPv6 source addresses. (CVE-2021-45485)

  - In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak     because the hash table is very small. (CVE-2021-45486)

  - nf_tables_newset in net/netfilter/nf_tables_api.c in the Linux kernel before 5.12.13 allows local users to     cause a denial of service (NULL pointer dereference and general protection fault) because of the missing     initialization for nft_set_elem_expr_alloc. A local user can set a netfilter table expression in their own     namespace. (CVE-2021-46283)

  - kernel: fs_context: heap overflow in legacy parameter handling (CVE-2022-0185)

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

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:0198-1 advisory.

    The SUSE Linux Enterprise 15 SP3 kernel was updated to receive various security and bugfixes.

    The following security bugs were fixed:

    - CVE-2022-0185: Incorrect param length parsing in legacy_parse_param which could have led to a local     privilege escalation (bsc#1194517).
    - CVE-2022-0322: Fixed a denial of service in SCTP sctp_addto_chunk (bsc#1194985).
    - CVE-2021-4197: Fixed a cgroup issue where lower privileged processes could write to fds of lower     privileged ones that could lead to privilege escalation (bsc#1194302).
    - CVE-2021-46283: nf_tables_newset in net/netfilter/nf_tables_api.c in the Linux kernel allowed local     users to cause a denial of service (NULL pointer dereference and general protection fault) because of the     missing initialization for nft_set_elem_expr_alloc. A local user can set a netfilter table expression in     their own namespace (bnc#1194518).
    - CVE-2021-4135: Fixed an information leak in the nsim_bpf_map_alloc function (bsc#1193927).
    - CVE-2021-4202: Fixed a race condition during NFC device remove which could lead to a use-after-free     memory corruption (bsc#1194529)
    - CVE-2021-4083: A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix     domain socket file handlers in the way users call close() and fget() simultaneously and can potentially     trigger a race condition. This flaw allowed a local user to crash the system or escalate their privileges     on the system. This flaw affects Linux kernel versions prior to 5.16-rc4 (bnc#1193727).
    - CVE-2021-4149: Fixed a locking condition in btrfs which could lead to system deadlocks (bsc#1194001).
    - CVE-2021-45485: In the IPv6 implementation in net/ipv6/output_core.c has an information leak because of     certain use of a hash table which, although big, doesn't properly consider that IPv6-based attackers can     typically choose among many IPv6 source addresses (bnc#1194094).
    - CVE-2021-45486: In the IPv4 implementation in net/ipv4/route.c has an information leak because the hash     table is very small (bnc#1194087).


Tenable has extracted the preceding description block directly from the SUSE 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 remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2022:0169-1 advisory.

  - A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket     file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race     condition. This flaw allows a local user to crash the system or escalate their privileges on the system.
    This flaw affects Linux kernel versions prior to 5.16-rc4. (CVE-2021-4083)

  - In the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information     leak because of certain use of a hash table which, although big, doesn't properly consider that IPv6-based     attackers can typically choose among many IPv6 source addresses. (CVE-2021-45485)

  - In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak     because the hash table is very small. (CVE-2021-45486)

  - nf_tables_newset in net/netfilter/nf_tables_api.c in the Linux kernel before 5.12.13 allows local users to     cause a denial of service (NULL pointer dereference and general protection fault) because of the missing     initialization for nft_set_elem_expr_alloc. A local user can set a netfilter table expression in their own     namespace. (CVE-2021-46283)

  - kernel: fs_context: heap overflow in legacy parameter handling (CVE-2022-0185)

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

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:0169-1 advisory.

    The SUSE Linux Enterprise 15 SP3 Azure kernel was updated to receive various security and bugfixes.

    The following security bugs were fixed:

    - CVE-2022-0185: Incorrect param length parsing in legacy_parse_param which could have led to a local     privilege escalation (bsc#1194517).
    - CVE-2022-0322: Fixed a denial of service in SCTP sctp_addto_chunk (bsc#1194985).
    - CVE-2021-4197: Fixed a cgroup issue where lower privileged processes could write to fds of lower     privileged ones that could lead to privilege escalation (bsc#1194302).
    - CVE-2021-46283: nf_tables_newset in net/netfilter/nf_tables_api.c in the Linux kernel allowed local     users to cause a denial of service (NULL pointer dereference and general protection fault) because of the     missing initialization for nft_set_elem_expr_alloc. A local user can set a netfilter table expression in     their own namespace (bnc#1194518).
    - CVE-2021-4135: Fixed an information leak in the nsim_bpf_map_alloc function (bsc#1193927).
    - CVE-2021-4202: Fixed a race condition during NFC device remove which could lead to a use-after-free     memory corruption (bsc#1194529)
    - CVE-2021-4083: A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix     domain socket file handlers in the way users call close() and fget() simultaneously and can potentially     trigger a race condition. This flaw allowed a local user to crash the system or escalate their privileges     on the system. (bnc#1193727).
    - CVE-2021-4149: Fixed a locking condition in btrfs which could lead to system deadlocks (bsc#1194001).
    - CVE-2021-45485: In the IPv6 implementation net/ipv6/output_core.c has an information leak because of     certain use of a hash table which, although big, doesn't properly consider that IPv6-based attackers can     typically choose among many IPv6 source addresses (bnc#1194094).
    - CVE-2021-45486: In the IPv4 implementation net/ipv4/route.c has an information leak because the hash     table is very small (bnc#1194087).


Tenable has extracted the preceding description block directly from the SUSE 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
267763	Unity Linux 20.1070e Security Update: kernel (UTSA-2025-414514)	Nessus	Unity Linux Local Security Checks	medium
244740	Linux Distros Unpatched Vulnerability : CVE-2021-46283	Nessus	Misc.	medium
157340	SUSE SLES15: cluster-md-kmp-rt / dlm-kmp-rt / gfs2-kmp-rt / kernel-devel-rt / etc (SUSE-SU-2022:0288-1)	Nessus	SuSE Local Security Checks	high
157147	openSUSE 15 Security Update : kernel (openSUSE-SU-2022:0198-1)	Nessus	SuSE Local Security Checks	high
157146	SUSE SLED15: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2022:0198-1)	Nessus	SuSE Local Security Checks	high
157104	openSUSE 15 Security Update : kernel (openSUSE-SU-2022:0169-1)	Nessus	SuSE Local Security Checks	high
157087	SUSE SLES15: kernel-azure / kernel-azure-devel / kernel-devel-azure / etc (SUSE-SU-2022:0169-1)	Nessus	SuSE Local Security Checks	high
151965	Photon OS 4.0: Linux PHSA-2021-4.0-0065	Nessus	PhotonOS Local Security Checks	high

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CVE-2021-46283

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