Last updated 29 November 2024
Buffer overflow in the mpoverridelegacyirq() function in arch/x86/kernel/acpi/boot.c in the Linux kernel through 3.2 allows local users to gain privileges via a crafted ACPI table.
A flaw was found on the linux kernel which enables a race condition in the L2TPv3 IP Encapsulation feature in the Linux kernel before 4.8.14 allows local users to gain privileges or cause a denial of service (use-after-free) by making multiple bind system calls without properly ascertaining whether a socket has the SOCKZAPPED status, related to net/l2tp/l2tpip.c and net/l2tp/l2tpip6.c.
Upstream patch:
https://github.com/torvalds/linux/commit/32c231164b76
Follow-up upstream patches:
https://github.com/torvalds/linux/commit/0382a25af3c7 https://github.com/torvalds/linux/commit/a3c18422a4b4 https://github.com/torvalds/linux/commit/d5e3a190937a https://github.com/torvalds/linux/commit/df90e6886146 https://github.com/torvalds/linux/commit/31e2f21fb35b
Merge commit of the above series:
https://github.com/torvalds/linux/commit/7752f72748db
Another follow-up upstream patch:
https://github.com/torvalds/linux/commit/94d7ee0baa8b
References:
https://source.android.com/security/bulletin/2017-03-01.html
An attacker within bluetooth transmission range can cause a stack buffer overflow in the Bluetooth system of the Linux kernel while processing pending L2CAP configuration responses from a client. An unauthenticated user able to connect to a system via Bluetooth could use this flaw to potentially execute arbitrary code with root privileges on the system.
External References:
https://www.armis.com/blueborne/ https://access.redhat.com/security/vulnerabilities/blueborne https://access.redhat.com/solutions/3177231 https://access.redhat.com/blogs/product-security/posts/blueborne
An upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e860d2c904d1a9f38a24eb44c9f34b8f915a6ea3
Last updated 29 November 2024
drivers/uwb/uwbd.c in the Linux kernel before 4.13.6 allows local users to cause a denial of service (general protection fault and system crash) or possibly have unspecified other impact via a crafted USB device.
Last updated 29 November 2024
Last updated 29 November 2024
drivers/usb/core/config.c in the Linux kernel before 4.13.6 allows local users to cause a denial of service (out-of-bounds read and system crash) or possibly have unspecified other impact via a crafted USB device, related to the USBDTINTERFACEASSOCIATION descriptor.
Last updated 29 November 2024
Last updated 29 November 2024
Last updated 29 November 2024
Last updated 24 July 2024
Last updated 24 July 2024
It was found that the fix for CVE-2016-9576 was incomplete: the Linux kernel's sg implementation did not properly restrict write operations in situations where the KERNELDS option is set. A local attacker to read or write to arbitrary kernel memory locations or cause a denial of service (use-after-free) by leveraging write access to a /dev/sg device.
A NULL pointer dereference flaw was found in the way the Linux kernel's network subsystem handled socket creation with an invalid protocol identifier. A local user could use this flaw to crash the system.
A vulnerability was found in the Linux kernel. Payloads of NM entries are not supposed to contain NUL. When such entry is processed, only the part prior to the first NUL goes into the concatenation (i.e. the directory entry name being encoded by a bunch of NM entries). The process stops when the amount collected so far + the claimed amount in the current NM entry exceed 254.
However, the value returned as the total length is the sum of claimed sizes, not the actual amount collected. And that can grow pretty large - not unlimited, since you'd need to put CE entries in between to be able to get more than the maximum that could be contained in one isofs directory entry / continuation chunk and the process stops once it had encountered 32 CEs, but you can get about 8Kb easily. And that's what will be passed to readdir callback as the name length. 8Kb copytouser() from a buffer allocated by getfreepage()
References, CVE-ID request and response:
http://seclists.org/oss-sec/2016/q2/363
http://seclists.org/oss-sec/2016/q2/365
Upstream fix:
https://git.kernel.org/linus/99d825822eade8d827a1817357cbf3f889a552d6
A vulnerabilty was found in the Linux kernels hiddev driver. An attacker with permissions to the USB HID device can call an ioctl with the HIDIOCGUSAGES or HIDIOCSUSAGES command, and passes a report id of HIDREPORTIDUNKNOWN range checks that would prevent oversize buffers being copied from userspace to kernel space were bypassed.
The kernel would loop on a a value passed by userspace and can copy memory outside of the intended range. This can corrupt memory located after the struct in memory, duplicating the kernel memory or crashing the system
Upstream patch:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=93a2001bdfd5376c3dc2158653034c20392d15c5
A vulnerability in the handling of Transactional Memory on powerpc systems was found. An unprivileged local user can crash the kernel by starting a transaction, suspending it, and then calling any of the exec() class system calls.
Patch:
https://patchwork.ozlabs.org/patch/636776/
Test case:
https://patchwork.ozlabs.org/patch/636774/
CVE request:
http://seclists.org/oss-sec/2016/q2/595
It was found that the Linux kernel's IPv6 implementation mishandles socket option data. A local attacker can abuse concurrent access to the socket options to escalate their privileges, or cause a denial of service (use-after-free and system crash) via a crafted sendmsg system call.
Upstream patch:
https://github.com/torvalds/linux/commit/45f6fad84cc305103b28d73482b344d7f5b76f39
Kernel panic (via skboverpanic) is encountered when sctp stack receive a malformed asconf chunks.
skboverpanic: text:ffffffffa01ea1c3 len:31056 put:30768 head:ffff88011bd81800 data:ffff88011bd81800 tail:0x7950 end:0x440 dev:<NULL> ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:129! [...] Call Trace: <IRQ> [<ffffffff8144fb1c>] skbput+0x5c/0x70 [<ffffffffa01ea1c3>] sctpaddtochunk+0x63/0xd0 [sctp] [<ffffffffa01eadaf>] sctpprocessasconf+0x1af/0x540 [sctp] [<ffffffff8152d025>] ? readunlockbh+0x15/0x20 [<ffffffffa01e0038>] sctpsfdoasconf+0x168/0x240 [sctp] ...
A remote attacker could use this flaw to crash the system.
Acknowledgements:
This issue was discovered by Liu Wei of Red Hat.
Kernel panic is encountered when sctp stack receives duplicate asconf chunks.
Upstream commmit:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b69040d8e39f20d5215a03502a8e8b4c6ab78395
An out-of-bounds memory access flaw was found in the Linux kernel's perf and ftrace subsystems.
On a system with syscall perf profiling on (CVE-2014-7825) an unprivileged local user could use this flaw to crash the system.
On a system with ftrace syscall tracing on (CVE-2014-7826) an unprivileged local user could use this flaw to crash the system or escalate their privileges on the system.
References: http://www.openwall.com/lists/oss-security/2014/11/06/11
Upstream fix: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=086ba77a6db00ed858ff07451bedee197df868c9
Acknowledgements:
Red Hat would like to thank Robert Święcki for reporting these issues.
arch/x86/kernel/entry64.S in the Linux kernel before 3.17.5 does not properly handle faults associated with the Stack Segment (SS) segment register, which allows local users to gain privileges by triggering an IRET instruction that leads to access to a GS Base address from the wrong space.
An out-of-bounds memory access flaw, CVE-2014-7825, was found in the syscall tracing functionality of the Linux kernel's perf subsystem. A local, unprivileged user could use this flaw to crash the system. Additionally, an out-of-bounds memory access flaw, CVE-2014-7826, was found in the syscall tracing functionality of the Linux kernel's ftrace subsystem. On a system with ftrace syscall tracing enabled, a local, unprivileged user could use this flaw to crash the system, or escalate their privileges.
It was found that routing packets to too many different dsts/too fast can lead to a excessive resource consumption.
A remote attacker can use this flaw to crash the system.
Introduced by: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f88649721268999bdff09777847080a52004f691
Acknowledgements:
This issue was found by Marcelo Ricardo Leitner of Red Hat.
Array index error in the tcmvhostmaketpg function in drivers/vhost/scsi.c in the Linux kernel before 4.0 might allow guest OS users to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted VHOSTSCSISETENDPOINT ioctl call. NOTE: the affected function was renamed to vhostscsimaketpg before the vulnerability was announced.
Last updated 24 July 2024
A flaw was found in the way the Linux kernel's networking implementation handled UDP packets with incorrect checksum values. A remote attacker could potentially use this flaw to trigger an infinite loop in the kernel, resulting in a denial of service on the system, or cause a denial of service in applications using the edge triggered epoll functionality.
Last updated 24 July 2024