Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: extend minimum interval restriction to entire cycle too It is possible for syzbot to bypass the restriction imposed by the criticized commit in the “Fixes” tag, because the taprio UAPI allows a cycle time that ...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mm: pagealloc: moving the mlocked flag to freepagesprepare Syzbot reported a problem with bad page state caused by a page being freed using freepage, while the mlocked flag is still present during the freepagesprepare stage: BUG:...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: mptcp: Properly handling disconnections due to fastopen. Syzbot was able to trigger data stream corruption: WARNING: CPU: 0 PID: 9846 at net/mptcp/protocol.c:1024 mptcpcleanuna+0xddb/0xff0 net/mptcp/protocol.c:1024 Modules...

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

In the Linux kernel, the following vulnerabilities have been resolved: nilfs2: Fixed a failure to detect corruption of DAT files in BTree and direct mappings. The patch series is titled “nilfs2: Fix kernel bug at submitbhwbc”. This resolves a kernel bug reported by syzbot. Since there are two...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net: removed two BUG functions from skbchecksumhelp. I have a syzbot report that managed to cause a crash in skbchecksumhelp. If syzbot can trigger these BUGs, it makes sense to replace them with more friendly WARNONONCE function...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Fixed a NULL dereference in ntfsupdatemftmirr. If ntfsfillsuper is not called, then sbi-sb will be equal to NULL. The code should check this pointer before dereferencing it. The Syzbot encountered this issue by passing...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: BPF: Setting the run context for the rawtp testrun callback. The syzbot reported a crash when the rawtp program was executed through the testrun interface, calling the bpfgetattachcookie helper or any other helper that accesses t...

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

In the Linux kernel, the following vulnerabilities have been resolved: net/sched: actapi: fixed a possible infinite loop in tcfidrcheckalloc The syzbot detected tasks that were stuck while waiting for rtnllock 1 A reproducer is available in the syzbot bug report. When a request is made to add...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: bpf: Do not redirect packets with invalid pktlen Syzbot identified an issue 1: the fqcodel Drop function attempts to drop a flow without any SKBs, that is, when flow-head is null. The root cause, as stated in 2, is that the...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: fs: jfs: fix shift-out-of-bounds in dbDiscardAG. This fix should apply to most URSAN bugs that were recently detected by syzbot, by addressing the issue related to dbMount. Since syzbot is allegedly feeding invalid data into the...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: HID: usbhid: freeing rawreport buffers when the device is removed. This fix addresses a memory leak reported by syzbot at: https://syzkaller.appspot.com/bug?id=7b4fa7cb1a7c2d3342a2a8a6c53371c8c418ab47...

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

In the Linux kernel, the following vulnerability has been resolved: ocfs2: Remove the unreasonable unlock in ocfs2readblocks. Patch series “Misc fixes for ocfs2readblocks”, version 5. This series contains two fixes for ocfs2readblocks. The first patch addresses the issue reported by syzbot, which...

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: ipv4: Check for a NULL idev in iprouteusehint. The syzbot was able to trigger a NULL deref in fibvalidatesource in an old tree 1. It appears that this bug still exists in the latest trees. All calls to indevgetrcu must be...

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

In the Linux kernel, the following vulnerability has been resolved: btrfs: Additional debug information will be output if an inline backref cannot be found. BREAK Syzbot reported several warnings that were triggered within the function lookupInlineExtentBackref. CAUSE As usual, the reproducer 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: ipvlan: Added a helper function for ipvlanroutev6outbound. This was inspired by reports from syzbot, which used multiple ipvlan devices in their stacks. The stack size required in ipvlanprocessv6outbound was reduced by moving...

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: HID: core: Harden s32ton to prevent conversion to 0-bit quantities Testing conducted by the syzbot fuzzer revealed that the HID core encounters a shift-out-of-bounds exception when it attempts to convert a 32-bit quantity to a...

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

In the Linux kernel, the following vulnerability has been resolved: UDF: Detection of system inodes linked into the directory hierarchy When the UDF filesystem is corrupted, hidden system inodes may be linked into the directory hierarchy. This can lead to further serious corruption of the...

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: net/sched: actife: avoided possible NULL derefrence tcfifeencode must ensure that ifeencode does not return NULL. syzbot reported: Oops: general protection fault, likely for non-canonical address 0xdffffc0000000000: 0000 1 SMP...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: afunix: fixed the issue of struct pid leaks in OOB support. The issue arises from queueoob calling maybeaddcreds, which potentially holds a reference to a pid. However, the destructor of skb is not set either directly or by...

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: net: tls: explicitly disallow disconnect Syzbot discovered that it can disconnect a TLS socket and then encounter various unexpected corner cases. I have a vague memory of Eric pointing this out to us a long time ago. Supporting...