In the Linux kernel, the following vulnerability has been resolved: sysctl: Fix data races in proc_douintvec_minmax(). A sysctl variable is accessed concurrently, and there is always a chance of data-race. So, all readers and writers need some basic protection to avoid load/store-tearing. This patch changes proc_douintvec_minmax() to use READ_ONCE() and WRITE_ONCE() internally to fix data-races on the sysctl side. For now, proc_douintvec_minmax() itself is tolerant to a data-race, but we still need to add annotations on the other subsystem's side.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:1027-1 advisory.

    The SUSE Linux Enterprise 15 SP4 kernel was updated to receive various security bugfixes.


    The following security bugs were fixed:

    - CVE-2024-2201: Fixed information leak in x86/BHI (bsc#1217339).
    - CVE-2024-41092: drm/i915/gt: Fix potential UAF by revoke of fence registers (bsc#1228483).
    - CVE-2024-42098: crypto: ecdh - explicitly zeroize private_key (bsc#1228779).
    - CVE-2024-42229: crypto: aead,cipher - zeroize key buffer after use (bsc#1228708).
    - CVE-2024-57996: net_sched: sch_sfq: do not allow 1 packet limit (bsc#1239076).
    - CVE-2024-58014: wifi: brcmsmac: add gain range check to wlc_phy_iqcal_gainparams_nphy() (bsc#1239109).
    - CVE-2025-21718: net: rose: fix timer races against user threads (bsc#1239073).
    - CVE-2025-21780: drm/amdgpu: avoid buffer overflow attach in smu_sys_set_pp_table() (bsc#1239115).


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 version of kernel installed on the remote host is prior to 5.10.135-122.509. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2025-086 advisory.

    An out-of-bounds read flaw was found in the Linux kernel's TeleTYpe subsystem. The issue occurs in how a     user triggers a race condition using ioctls TIOCSPTLCK and TIOCGPTPEER and TIOCSTI and TCXONC with leakage     of memory in the flush_to_ldisc function. This flaw allows a local user to crash the system or read     unauthorized random data from memory. (CVE-2022-1462)

    A bug in the IMA subsystem was discovered which would incorrectly allow kexec to be used when kernel     lockdown was enabled (CVE-2022-21505)

    Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate is unused by     its CNA. Notes: none. (CVE-2022-23816)

    A flaw was found in hw. Aliases in the branch predictor may cause some AMD processors to predict the wrong     branch type, potentially leading to information disclosure. (CVE-2022-23825)

    Non-transparent sharing of return predictor targets between contexts in some Intel(R) Processors may allow     an authorized user to potentially enable information disclosure via local access. (CVE-2022-26373)

    A flaw was found in hw. The unprotected alternative channel of return branch target prediction in some     Intel(R) Processors may allow an authorized user to enable information disclosure via local access.
    (CVE-2022-28693)

    A flaw was found in hw. Mis-trained branch predictions for return instructions may allow arbitrary     speculative code execution under certain microarchitecture-dependent conditions. (CVE-2022-29900)

    Intel microprocessor generations 6 to 8 are affected by a new Spectre variant that is able to bypass their     retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can     hijack return instructions to achieve arbitrary speculative code execution under certain     microarchitecture-dependent conditions. (CVE-2022-29901)

    A memory access flaw was found in the Linux kernel's XEN hypervisor for the virtual machine. This flaw     allows a local user to crash the system or potentially escalate their privileges on the system.
    (CVE-2022-36123)

    An issue was discovered in the Linux kernel through 5.18.14. xfrm_expand_policies in     net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice. (CVE-2022-36879)

    A memory corruption flaw was found in the Linux kernel's Netfilter subsystem in the way a local user uses     the libnetfilter_queue when analyzing a corrupted network packet. This flaw allows a local user to crash     the system or a remote user to crash the system when the libnetfilter_queue is used by a local user.
    (CVE-2022-36946)

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

    vt: fix memory overlapping when deleting chars in the buffer (CVE-2022-48627)

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

    ext4: fix race condition between ext4_write and ext4_convert_inline_data (CVE-2022-49414)

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

    mm/mempolicy: fix uninit-value in mpol_rebind_policy() (CVE-2022-49567)

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

    tcp: Fix data-races around sysctl_tcp_slow_start_after_idle. (CVE-2022-49572)

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

    udp: Fix a data-race around sysctl_udp_l3mdev_accept. (CVE-2022-49577)

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

    ipv4: Fix a data-race around sysctl_fib_multipath_use_neigh. (CVE-2022-49580)

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

    iavf: Fix handling of dummy receive descriptors (CVE-2022-49583)

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

    igmp: Fix data-races around sysctl_igmp_qrv. (CVE-2022-49589)

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

    igmp: Fix data-races around sysctl_igmp_llm_reports. (CVE-2022-49590)

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

    tcp: Fix a data-race around sysctl_tcp_mtu_probe_floor. (CVE-2022-49594)

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

    tcp: Fix a data-race around sysctl_tcp_probe_threshold. (CVE-2022-49595)

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

    ip: Fix a data-race around sysctl_ip_autobind_reuse. (CVE-2022-49600)

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

    ip: Fix data-races around sysctl_ip_fwd_update_priority. (CVE-2022-49603)

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

    x86/speculation: Fill RSB on vmexit for IBRS (CVE-2022-49611)

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

    nexthop: Fix data-races around nexthop_compat_mode. (CVE-2022-49629)

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

    raw: Fix a data-race around sysctl_raw_l3mdev_accept. (CVE-2022-49631)

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

    icmp: Fix data-races around sysctl. (CVE-2022-49638)

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

    sysctl: Fix data races in proc_douintvec_minmax(). (CVE-2022-49640)

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

    cgroup: Use separate src/dst nodes when preloading css_sets for migration (CVE-2022-49647)

    A NULL pointer dereference issue was found in the SCTP network protocol in net/sctp/stream_sched.c in the     Linux kernel. If stream_in allocation fails, stream_out is freed, which would be accessed further. This     flaw allows a local user to crash the system or potentially cause a denial of service. (CVE-2023-2177)

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 5.15.57-29.131. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.15-2025-068 advisory.

    Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate is unused by     its CNA. Notes: none. (CVE-2022-23816)

    A flaw was found in hw. Aliases in the branch predictor may cause some AMD processors to predict the wrong     branch type, potentially leading to information disclosure. (CVE-2022-23825)

    Non-transparent sharing of return predictor targets between contexts in some Intel(R) Processors may allow     an authorized user to potentially enable information disclosure via local access. (CVE-2022-26373)

    A flaw was found in hw. The unprotected alternative channel of return branch target prediction in some     Intel(R) Processors may allow an authorized user to enable information disclosure via local access.
    (CVE-2022-28693)

    A flaw was found in hw. Mis-trained branch predictions for return instructions may allow arbitrary     speculative code execution under certain microarchitecture-dependent conditions. (CVE-2022-29900)

    Intel microprocessor generations 6 to 8 are affected by a new Spectre variant that is able to bypass their     retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can     hijack return instructions to achieve arbitrary speculative code execution under certain     microarchitecture-dependent conditions. (CVE-2022-29901)

    A memory access flaw was found in the Linux kernel's XEN hypervisor for the virtual machine. This flaw     allows a local user to crash the system or potentially escalate their privileges on the system.
    (CVE-2022-36123)

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

    vt: fix memory overlapping when deleting chars in the buffer (CVE-2022-48627)

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

    x86/speculation: Fill RSB on vmexit for IBRS (CVE-2022-49611)

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

    nexthop: Fix data-races around nexthop_compat_mode. (CVE-2022-49629)

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

    raw: Fix a data-race around sysctl_raw_l3mdev_accept. (CVE-2022-49631)

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

    icmp: Fix data-races around sysctl_icmp_echo_enable_probe. (CVE-2022-49633)

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

    icmp: Fix data-races around sysctl. (CVE-2022-49638)

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

    sysctl: Fix data races in proc_douintvec_minmax(). (CVE-2022-49640)

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

    cgroup: Use separate src/dst nodes when preloading css_sets for migration (CVE-2022-49647)

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

  - In the Linux kernel, the following vulnerability has been resolved: sysctl: Fix data races in     proc_douintvec_minmax(). A sysctl variable is accessed concurrently, and there is always a chance of data-     race. So, all readers and writers need some basic protection to avoid load/store-tearing. This patch     changes proc_douintvec_minmax() to use READ_ONCE() and WRITE_ONCE() internally to fix data-races on the     sysctl side. For now, proc_douintvec_minmax() itself is tolerant to a data-race, but we still need to add     annotations on the other subsystem's side. (CVE-2022-49640)

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

ID	Name	Product	Family	Severity
233410	SUSE SLES15 Security Update : kernel (SUSE-SU-2025:1027-1)	Nessus	SuSE Local Security Checks	high
233373	Amazon Linux 2 : kernel (ALASKERNEL-5.10-2025-086)	Nessus	Amazon Linux Local Security Checks	high
232916	Amazon Linux 2 : kernel (ALASKERNEL-5.15-2025-068)	Nessus	Amazon Linux Local Security Checks	high
226115	Linux Distros Unpatched Vulnerability : CVE-2022-49640	Nessus	Misc.	medium

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CVE-2022-49640

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Tenable Plugins

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