UBUNTU-CVE-2021-47295

In the Linux kernel, the following vulnerability has been resolved: net: sched: fix memory leak in tcindexpartialdestroywork Syzbot reported memory leak in tcindexsetparms. The problem was in non-freed perfect hash in tcindexpartialdestroywork. In tcindexsetparms new tcindexdata is allocated and...

CVE-2021-47280

In the Linux kernel, the following vulnerability has been resolved: drm: Fix use-after-free read in drmgetunique There is a time-of-check-to-time-of-use error in drmgetunique due to retrieving filepriv-master prior to locking the device's master mutex. An example can be seen in the crash report o...

CVE-2021-47404

In the Linux kernel, the following vulnerability has been resolved: HID: betop: fix slab-out-of-bounds Write in betopprobe Syzbot reported slab-out-of-bounds Write bug in hid-betopff driver. The problem is the driver assumes the device must have an input report but some malicious devices violate...

CVE-2021-47237

In the Linux kernel, the following vulnerability has been resolved: net: hamradio: fix memory leak in mkissclose My local syzbot instance hit memory leak in mkissopen1. The problem was in missing freenetdev in mkissclose. In mkissopen netdevice is allocated and then registered, but in mkissclose...

UBUNTU-CVE-2021-47405

In the Linux kernel, the following vulnerability has been resolved: HID: usbhid: free rawreport buffers in usbhidstop Free the unsent rawreport buffers when the device is removed. Fixes a memory leak reported by syzbot at: https://syzkaller.appspot.com/bug?id=7b4fa7cb1a7c2d3342a2a8a6c53371c8c418a...

CVE-2021-47370

In the Linux kernel, the following vulnerability has been resolved: mptcp: ensure tx skbs always have the MPTCP ext Due to signed/unsigned comparison, the expression: info-sizegoal - skb-len 0 evaluates to true when the size goal is smaller than the skb size. That results in lack of tx cache...

CVE-2021-47408

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: serialize hash resizes and cleanups Syzbot was able to trigger the following warning 1 No repro found by syzbot yet but I was able to trigger similar issue by having 2 scripts running in parallel, changing...

UBUNTU-CVE-2021-47397

In the Linux kernel, the following vulnerability has been resolved: sctp: break out if skbheaderpointer returns NULL in sctprcvootb We should always check if skbheaderpointer's return is NULL before using it, otherwise it may cause null-ptr-deref, as syzbot reported: KASAN: null-ptr-deref in rang...

UBUNTU-CVE-2021-47370

In the Linux kernel, the following vulnerability has been resolved: mptcp: ensure tx skbs always have the MPTCP ext Due to signed/unsigned comparison, the expression: info-sizegoal - skb-len 0 evaluates to true when the size goal is smaller than the skb size. That results in lack of tx cache...

UBUNTU-CVE-2021-47232

In the Linux kernel, the following vulnerability has been resolved: can: j1939: fix Use-after-Free, hold skb ref while in use This patch fixes a Use-after-Free found by the syzbot. The problem is that a skb is taken from the per-session skb queue, without incrementing the ref count. This leads to...

CVE-2021-47418 net_sched: fix NULL deref in fifo_set_limit()

In the Linux kernel, the following vulnerability has been resolved: netsched: fix NULL deref in fifosetlimit syzbot reported another NULL deref in fifosetlimit 1 I could repro the issue with : unshare -n tc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit tc qd replace dev ...

CVE-2021-47418

CVE-2021-47418 refers to a Linux kernel vulnerability in net_sched: a NULL pointer dereference inside fifo_set_limit() that could OOPS when adjusting limits on certain qdiscs (notably pfifo_fast, which lacks a change() operation). The issue was reproduced via syzbot and the fix makes fifo_set_lim...

CVE-2021-47418

In the Linux kernel, the following vulnerability has been resolved: netsched: fix NULL deref in fifosetlimit syzbot reported another NULL deref in fifosetlimit 1 I could repro the issue with : unshare -n tc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit tc qd replace dev ...

CVE-2021-47418 net_sched: fix NULL deref in fifo_set_limit()

In the Linux kernel, the following vulnerability has been resolved: netsched: fix NULL deref in fifosetlimit syzbot reported another NULL deref in fifosetlimit 1 I could repro the issue with : unshare -n tc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit tc qd replace dev ...

CVE-2021-47419 net/sched: sch_taprio: properly cancel timer from taprio_destroy()

In the Linux kernel, the following vulnerability has been resolved: net/sched: schtaprio: properly cancel timer from tapriodestroy There is a comment in qdisccreate about us not calling ops-reset in some cases. errout4: / Any broken qdiscs that would require a ops-reset here? The qdisc was never ...

CVE-2021-47416 phy: mdio: fix memory leak

In the Linux kernel, the following vulnerability has been resolved: phy: mdio: fix memory leak Syzbot reported memory leak in MDIO bus interface, the problem was in wrong state logic. MDIOBUSALLOCATED indicates 2 states: 1. Bus is only allocated 2. Bus allocated and mdiobusregister fails, but...

CVE-2021-47408 netfilter: conntrack: serialize hash resizes and cleanups

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: serialize hash resizes and cleanups Syzbot was able to trigger the following warning 1 No repro found by syzbot yet but I was able to trigger similar issue by having 2 scripts running in parallel, changing...

CVE-2021-47408

CVE-2021-47408 affects the Linux kernel netfilter conntrack code. The issue arises when the conntrack hash table resizes or during cleanup, causing nf_ct_iterate_cleanup to restart after a resize and delaying net_namespace teardown. The available connected documents state that adding a mutex to s...

CVE-2021-47405 HID: usbhid: free raw_report buffers in usbhid_stop

In the Linux kernel, the following vulnerability has been resolved: HID: usbhid: free rawreport buffers in usbhidstop Free the unsent rawreport buffers when the device is removed. Fixes a memory leak reported by syzbot at: https://syzkaller.appspot.com/bug?id=7b4fa7cb1a7c2d3342a2a8a6c53371c8c418a...

CVE-2021-47405

In the Linux kernel, the following vulnerability has been resolved: HID: usbhid: free rawreport buffers in usbhidstop Free the unsent rawreport buffers when the device is removed. Fixes a memory leak reported by syzbot at: https://syzkaller.appspot.com/bug?id=7b4fa7cb1a7c2d3342a2a8a6c53371c8c418a...