CVSS: 4.6EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47118 – pid: take a reference when initializing `cad_pid`
https://notcve.org/view.php?id=CVE-2021-47118
15 Mar 2024 — In the Linux kernel, the following vulnerability has been resolved: pid: take a reference when initializing `cad_pid` During boot, kernel_init_freeable() initializes `cad_pid` to the init task's struct pid. Later on, we may change `cad_pid` via a sysctl, and when this happens proc_do_cad_pid() will increment the refcount on the new pid via get_pid(), and will decrement the refcount on the old pid via put_pid(). As we never called get_pid() when we initialized `cad_pid`, we decrement a reference we never inc... • https://git.kernel.org/stable/c/9ec52099e4b8678a60e9f93e41ad87885d64f3e6 • CWE-416: Use After Free •
CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47117 – ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed
https://notcve.org/view.php?id=CVE-2021-47117
15 Mar 2024 — In the Linux kernel, the following vulnerability has been resolved: ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed We got follow bug_on when run fsstress with injecting IO fault: [130747.323114] kernel BUG at fs/ext4/extents_status.c:762! [130747.323117] Internal error: Oops - BUG: 0 [#1] SMP ...... [130747.334329] Call trace: [130747.334553] ext4_es_cache_extent+0x150/0x168 [ext4] [130747.334975] ext4_cache_extents+0x64/0xe8 [ext4] [130747.335368] ext4_find_extent+0x300/0x330 [ext4... • https://git.kernel.org/stable/c/e33bafad30d34cfa5e9787cb099cab05e2677fcb •
CVSS: 4.7EPSS: 0%CPEs: 3EXPL: 0CVE-2021-47116 – ext4: fix memory leak in ext4_mb_init_backend on error path.
https://notcve.org/view.php?id=CVE-2021-47116
15 Mar 2024 — In the Linux kernel, the following vulnerability has been resolved: ext4: fix memory leak in ext4_mb_init_backend on error path. Fix a memory leak discovered by syzbot when a file system is corrupted with an illegally large s_log_groups_per_flex. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: ext4: corrige la pérdida de memoria en ext4_mb_init_backend en la ruta de error. Solucione una pérdida de memoria descubierta por syzbot cuando un sistema de archivos está dañado con un s_log_groups_pe... • https://git.kernel.org/stable/c/2050c6e5b161e5e25ce3c420fef58b24fa388a49 •
CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47114 – ocfs2: fix data corruption by fallocate
https://notcve.org/view.php?id=CVE-2021-47114
15 Mar 2024 — In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix data corruption by fallocate When fallocate punches holes out of inode size, if original isize is in the middle of last cluster, then the part from isize to the end of the cluster will be zeroed with buffer write, at that time isize is not yet updated to match the new size, if writeback is kicked in, it will invoke ocfs2_writepage()->block_write_full_page() where the pages out of inode size will be dropped. That will cause file c... • https://git.kernel.org/stable/c/624fa7baa3788dc9e57840ba5b94bc22b03cda57 •
CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 0CVE-2021-47113 – btrfs: abort in rename_exchange if we fail to insert the second ref
https://notcve.org/view.php?id=CVE-2021-47113
15 Mar 2024 — In the Linux kernel, the following vulnerability has been resolved: btrfs: abort in rename_exchange if we fail to insert the second ref Error injection stress uncovered a problem where we'd leave a dangling inode ref if we failed during a rename_exchange. This happens because we insert the inode ref for one side of the rename, and then for the other side. If this second inode ref insert fails we'll leave the first one dangling and leave a corrupt file system behind. Fix this by aborting if we did the insert... • https://git.kernel.org/stable/c/0df50d47d17401f9f140dfbe752a65e5d72f9932 •
CVSS: 3.3EPSS: 0%CPEs: 4EXPL: 0CVE-2021-47112 – x86/kvm: Teardown PV features on boot CPU as well
https://notcve.org/view.php?id=CVE-2021-47112
15 Mar 2024 — In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Teardown PV features on boot CPU as well Various PV features (Async PF, PV EOI, steal time) work through memory shared with hypervisor and when we restore from hibernation we must properly teardown all these features to make sure hypervisor doesn't write to stale locations after we jump to the previously hibernated kernel (which can try to place anything there). For secondary CPUs the job is already done by kvm_cpu_down_prepare(), ... • https://git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54 •
CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 0CVE-2021-47111 – xen-netback: take a reference to the RX task thread
https://notcve.org/view.php?id=CVE-2021-47111
15 Mar 2024 — In the Linux kernel, the following vulnerability has been resolved: xen-netback: take a reference to the RX task thread Do this in order to prevent the task from being freed if the thread returns (which can be triggered by the frontend) before the call to kthread_stop done as part of the backend tear down. Not taking the reference will lead to a use-after-free in that scenario. Such reference was taken before but dropped as part of the rework done in 2ac061ce97f4. Reintroduce the reference taking and add a ... • https://git.kernel.org/stable/c/2ac061ce97f413bfbbdd768f7d2e0fda2e8170df •
CVSS: 5.5EPSS: 0%CPEs: 4EXPL: 0CVE-2021-47110 – x86/kvm: Disable kvmclock on all CPUs on shutdown
https://notcve.org/view.php?id=CVE-2021-47110
15 Mar 2024 — In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Disable kvmclock on all CPUs on shutdown Currenly, we disable kvmclock from machine_shutdown() hook and this only happens for boot CPU. We need to disable it for all CPUs to guard against memory corruption e.g. on restore from hibernate. Note, writing '0' to kvmclock MSR doesn't clear memory location, it just prevents hypervisor from updating the location so for the short while after write and while CPU is still alive, the clock re... • https://git.kernel.org/stable/c/9084fe1b3572664ad276f427dce575f580c9799a •
CVSS: 5.5EPSS: 0%CPEs: 4EXPL: 0CVE-2021-47109 – neighbour: allow NUD_NOARP entries to be forced GCed
https://notcve.org/view.php?id=CVE-2021-47109
15 Mar 2024 — In the Linux kernel, the following vulnerability has been resolved: neighbour: allow NUD_NOARP entries to be forced GCed IFF_POINTOPOINT interfaces use NUD_NOARP entries for IPv6. It's possible to fill up the neighbour table with enough entries that it will overflow for valid connections after that. This behaviour is more prevalent after commit 58956317c8de ("neighbor: Improve garbage collection") is applied, as it prevents removal from entries that are not NUD_FAILED, unless they are more than 5s old. En e... • https://git.kernel.org/stable/c/58956317c8de52009d1a38a721474c24aef74fe7 •
CVSS: 5.5EPSS: 0%CPEs: 13EXPL: 0CVE-2024-26629 – nfsd: fix RELEASE_LOCKOWNER
https://notcve.org/view.php?id=CVE-2024-26629
13 Mar 2024 — In the Linux kernel, the following vulnerability has been resolved: nfsd: fix RELEASE_LOCKOWNER The test on so_count in nfsd4_release_lockowner() is nonsense and harmful. Revert to using check_for_locks(), changing that to not sleep. First: harmful. As is documented in the kdoc comment for nfsd4_release_lockowner(), the test on so_count can transiently return a false positive resulting in a return of NFS4ERR_LOCKS_HELD when in fact no locks are held. This is clearly a protocol violation and with the Linux N... • https://git.kernel.org/stable/c/3097f38e91266c7132c3fdb7e778fac858c00670 • CWE-393: Return of Wrong Status Code •