Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: cloneprivatemnt: Make sure that the caller has CAPSYSADMIN in the correct user namespaces. What we want is to ensure that clone does not expose something hidden by a mount that we wouldn’t be able to undo. “ wouldn’t be able to...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: dochangetype: refusal to operate on unmounted/not-of-our-mounts mounts. It is ensured that propagation settings can only be changed for mounts located within the caller’s mount namespace. This change aligns permission checks with...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: Apparmor: Avoid a crash when parsing an empty profile name. When processing a packed profile in unpackprofile, the string “:samba-dcerpcd” is parsed as a fully qualified name and then passed to aasplitnfqname. aasplitnfqname trea...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net/tipc: fixed the slab-use-after-free issue in tipcaeadencryptdone+0x4bd/0x510 net/tipc/crypto.c:840 Syzbot reported a slab-use-after-free issue with the following call trace:...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fixed a potential “struct net” leak in inet6rtmgetaddr. It appears that if the user space provides a correct IFATARGETNETNSID value, but no IFAADDRESS or IFALOCAL attributes are set, inet6rtmgetaddr will return -EINVAL, alo...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: devlink: fixed the netns refcount leak in devlinknlcmdreload. While preparing my patch series that includes netns refcount tracking, I discovered bugs in devlinknlcmdreload. Some error paths failed to release the refcount...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net/smc: Reduced Rtnl pressure in smcpnetcreatepnetidslist. Many syzbot reports indicate extreme Rtnl pressure, and many of them suggest that smc acquires Rtnl during the creation of netnames without any valid reason 1. This patc...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: binfmtmisc: Do not allow an ‘F’ entry to pin its own instance. An entry registered with ‘F’ opens its interpreter at the time of registration and holds that file until the entry is freed. Any entry that is manually removed is onl...

Astra Linux – Vulnerabilities in Firefox, Thunderbird, Expat, LibXMLTok

In xmlparse.c within Expat also known as libexpat, prior to version 2.4.5, attackers could insert namespace-separator characters into namespace URIs...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: pid: Added a check for ns null in pidnrns. taskpidnrns ns = taskactivepidnscurrent; pidnrnsrcudereferencetaskpidptrtask, type, ns; if pid && ns-level level Sometimes, null is returned for taskactivepidns. This can trigger kernel...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: fixed a use-after-free in twtimerhandler A real-world panic issue was discovered in Linux 5.4. The details of the issue are as follows: - Bug: Unable to handle a page fault for the address: ffffde49a863de28 - Memory layout:...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerabilities have been resolved: netfilter: nftables – Use a timestamp to check for set element timeout. A timestamp field was added at the beginning of the transaction; it is stored in the nftablespernetns area. The .insert, .deactivate, and syncgc functions...

Astra Linux – Vulnerability in Linux 5.10

Due to a vulnerability in the iouring subsystem, it is possible for kernel memory information to be leaked to the user process. timensinstall calls currentissinglethreaded to determine whether the current process is single-threaded. However, this call does not take into account iouring’s ioworker...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: Fixed a race condition between namespace cleanup and garbage collection for the list:set type. Lion Ackermann reported that there is a race condition between namespace cleanup in ipset and garbage collection of...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerabilities have been resolved: netns: Ensure that getnetns handles zero refcount nets properly. Syzkaller encountered a warning: refcountt: Addition on 0; use-after-free. WARNING: CPU: 3 PID: 7890 at lib/refcount.c:25 refcountwarnsaturate+0xdf/0x1d0 Linked...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: nfs: Handling of the error from rpcprocregister in nfsnetinit. syzkaller reported a warning 0 that was triggered while destroying immature netnames. The rpcprocregister function was called in initnfsfs, but its error has been...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: nvme: fixed the SRCU protection for the nvmenshead list The process of walking the nvmenshead siblings list is protected by the head’s srcu in nvmensheadsubmitbio, but not in nvmempathrevalidatePaths. Removing namespaces from...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: - In the net subsystem, do not delay the execution of dstentriesadd within dstrelease. - dstentriesadd uses data per-core that might be freed during the dismantling of ip6routenetexit, by calling dstentriesdestroy. Before...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net/smc: Fixed a possible leak of the pernet namespace in smcinit. In smcinit, registerpernetsubsys&smcnetstatops is called without any error handling. If this call fails, the registration of &smcnetops will not be reversed. And ...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: rtomin/max: Avoid using current-nsproxy. As mentioned in a previous commit of this series, using the net structure via current is not recommended for various reasons: - Inconsistency: Getting information from the...