Updated kernel packages fix security vulnerabilities

This kernel update is based on upstream 5.10.27 and fixes at least the following security issues: The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions...

Linux: blkback driver may leak persistent grants

ISSUE DESCRIPTION The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup...

Fedora 32 : xen (2021-a468f36bbe)

The remote Fedora 32 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2021-a468f36bbe advisory. - HVM soft-reset crashes toolstack XSA-368 CVE-2021-28687 - HVM soft-reset crashes toolstack XSA-368 fedora-all CVE-2021-28687 Note that Nessus has...

SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0740-1)

The SUSE Linux Enterprise 15 kernel was updated to receive various security and bugfixes. The following security bugs were fixed : CVE-2021-26930: Fixed an improper error handling in blkback's grant mapping XSA-365 bsc1181843. CVE-2021-26931: Fixed an issue where Linux kernel was treating grant...

[SECURITY] [DLA 2586-1] linux security update

Debian LTS Advisory DLA-2586-1 [email protected] https://www.debian.org/lts/security/ Ben Hutchings March 08, 2021 https://wiki.debian.org/LTS Package : linux Version : 4.9.258-1 CVE ID : CVE-2019-19318 CVE-2019-19813 CVE-2019-19816 CVE-2020-27815 CVE-2020-27825 CVE-2020-28374...

CVE-2021-27379

A flaw was found in xen. An oversight was made when backporting XSA-320, leading to entries in the IOMMU not being properly updated under certain circumstances...

missed flush in XSA-321 backport

ISSUE DESCRIPTION An oversight was made when backporting XSA-321, leading entries in the IOMMU not being properly updated under certain circumstances. IMPACT A malicious guest may be able to retain read/write DMA access to frames returned to Xen's free pool, and later reused for another purpose...

Xen OOM DoS (XSA-349)

According to its self-reported version number, the Xen hypervisor installed on the remote host is affected by a denial of service vulnerability due to an issue with the watch event queue. A malicious guest can exploit this, by abusing the unbounded queue, to cause an out-of-memory error in the...

Fedora 33 : xen (2021-7785f6c616)

The remote Fedora 33 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2021-7785f6c616 advisory. - IRQ vector leak on x86 XSA-360 FEDORA-2021-7785f6c616 Note that Nessus has not tested for this issue but has instead relied only on the application's...

Xen INVLPG-like flushes may leave stale TLB entries privilege escalation (XSA-286)

A privilege escalation vulnerability exists in Xen x86 PV guest kernels due to mishandles invalidation of TLB entries An unauthenticated, local attacker x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during...

Xen Missing memory barriers DoS (XSA-340)

A denial of service DoS vulnerability exists in Xen servers when accessing/allocating an event channel due to a missing memory barrier. An authenticated, local attacker may be able to cause a hypervisor crash resulting in a Denial of Service DoS. Note that Nessus has not tested for this issue but...

Xen lack of preemption in evtchn_reset() / evtchn_destroy() DoS (XSA-344)

A denial of service DoS vulnerability exists in Xen servers in FIFO event channel modules evtchnreset / evtchndestroy due to a lack of preemption. An authenticated, local attacker can mount a Denial of Service DoS attack affecting the entire system. Note that Nessus has not tested for this issue...

Xen xenstored watch DoS (XSA-324)

According to its self-reported version number, the Xen hypervisor installed on the remote host is affected by a denial of service vulnerability due to an issue with max payload length in xenstored. A malicious guest can exploit this, by registering a 'watch' with using a very large tag, to cause ...

Xen oxenstored DoS (XSA-352)

According to its self-reported version number, the Xen hypervisor installed on the remote host is affected by a denial of service vulnerability due to an issue with oxenstored. A malicious guest administrator can change xenstore node ownership to run another guest out of quota, or create an...

Fedora 32 : xen (2020-df772b417b)

xenstore watch notifications lacking permission checks XSA-115, CVE-2020-29480 1908091 Xenstore: new domains inheriting existing node permissions XSA-322, CVE-2020-29481 1908095 Xenstore: wrong path length check XSA-323, CVE-2020-29482 1908096 Xenstore: guests can crash xenstored via watchs...

SUSE SLES12 Security Update : xen (SUSE-SU-2020:3742-1)

This update for xen fixes the following issues : bsc1178963 - stack corruption from XSA-346 change XSA-355 bsc1177409 - CVE-2020-27674: x86 PV guest INVLPG-like flushes may leave stale TLB entries XSA-286 bsc1177412 - CVE-2020-27672: Race condition in Xen mapping code XSA-345 bsc1177413 -...

SUSE SLES12 Security Update : kernel (SUSE-SU-2020:3544-1)

The SUSE Linux Enterprise 12 SP4 kernel was updated to receive various security and bug fixes. The following security bugs were fixed : CVE-2020-25705: A flaw in the way reply ICMP packets are limited in was found that allowed to quickly scan open UDP ports. This flaw allowed an off-path remote...

SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2020:3412-1)

This update for xen fixes the following issues : Security issue fixed : CVE-2020-28368: Fixed the Intel RAPL sidechannel attack, aka PLATYPUS attack, aka XSA-351 bsc1178591. Non-security issues fixed : Updated to Xen 4.13.2 bug fix release bsc1027519. Fixed a panic during MSI cleanup on AMD...

SUSE SLES12 Security Update : xen (SUSE-SU-2020:3631-1)

This update for xen fixes the following issues : bsc1178963 - stack corruption from XSA-346 change XSA-355 bsc1177409 - CVE-2020-27674: x86 PV guest INVLPG-like flushes may leave stale TLB entries XSA-286 bsc1177412 - CVE-2020-27672: Race condition in Xen mapping code XSA-345 bsc1177413 -...

SUSE SLES12 Security Update : xen (SUSE-SU-2020:3414-1)

This update for xen fixes the following issues : Security issue fixed : CVE-2020-28368: Fixed the Intel RAPL sidechannel attack, aka PLATYPUS attack, aka XSA-351 bsc1178591. Non-security issues fixed : Updated to Xen 4.12.4 bug fix release bsc1027519. Fixed a panic during MSI cleanup on AMD...