CVE-2021-46915

The CVE-2021-46915 issue is in the Linux kernel’s netfilter nft_limit code. nft_limit_init attempted to divide a 64-bit value by a 64-bit expectation but used div_u64 (dividing 64-bit by 32-bit), risking a divide error. The fix changes nft_limit_init to use the correct 64-bit division function (d...

CVE-2021-3773

CVE-2021-3773 is a netfilter information-disclosure vulnerability in the Linux kernel that could allow a network-connected attacker to infer the OpenVPN connection endpoint. The issue is described as an information leak through netfilter, enabling reconnaissance for further attacks. Exploitation ...

CVE-2021-46909

Mode C (normal, concrete details available) CVE-2021-46909 affects the Linux kernel PCI subsystem (ARM) and is resolved by a PCI interrupt/mapping fix in ARM: footbridge. The root cause was that after commit 30fdfb929e82, the kernel started mapping PCI IRQs whenever a PCI driver is probed via pci...

CVE-2023-4206

CVE-2023-4206 is a use-after-free vulnerability in the Linux kernel net/sched: cls_route (route handling) caused by route4_change() copying the entire tcf_result into a new filter. On update, tcf_unbind_filter() is invoked on the old instance, decreasing the parent class’ filter_cnt and potential...

CVE-2024-53104

CVE-2024-53104 affects the Linux kernel USB Video Class (UVC) driver, specifically the uvc_parse_format logic which should skip frames of type UVC_VS_UNDEFINED. The fix prevents an out-of-bounds write in uvc_parse_streaming caused by mis-sized frame buffers, addressing an out-of-bounds write vuln...

CVE-2015-1593

CVE-2015-1593 affects the Linux kernel: on 64-bit platforms, the stack randomization (ASLR) feature uses incorrect data types for bitwise left-shift results, making it easier to predict the stack top address and bypass ASLR. The issue is tied to functions such as randomize_stack_top in fs/binfmt_...

CVE-2021-46927

CVE-2021-46927 concerns Linux kernel Nitro Enclaves memory mapping. After commit 5b78ed24e8ec, a call to get_user_pages() can trigger an mmap assertion when setting enclave memory regions. The fix switches to get_user_pages_unlocked() for enclave memory region setup, mirroring patterns like mmap_...

CVE-2018-13405

CVE-2018-13405 involves the Linux kernel inode_init_owner() logic where, in a scenario with an SGID directory and a writably user who is not in that group, a local user could create a plain file with the SGID group ownership and executable bits, effectively escalating privileges. Connected docume...

CVE-2018-20856

CVE-2018-20856 : Linux kernel before 4.18.7 contains a use-after-free in block/blk-core.c__blk_drain_queue() when an error case is mishandled. This could allow a local attacker to cause a denial of service or, potentially, execute arbitrary code. The issue was addressed in the 4.18.7 patch releas...

CVE-2020-36777

CVE-2020-36777 is a Linux kernel issue where media: dvbdev had a memory leak in dvb_media_device_free(), documented as freeing dvbdev->adapter->conn before NULL-ing it. The connected MiracleLinux advisory (AXSA-2024-8481:17) lists this CVE among others and confirms a fix/vendor advisory. Th...

CVE-2019-14284

CVE-2019-14284 affects the Linux kernel prior to 5.2.3, where floppy.c can suffer a division-by-zero in setup_format_params. Two consecutive ioctls can trigger a DOs: the first ioctl sets geometry (.sect/.rate) such that F_SECT_PER_TRACK becomes zero; the second triggers the floppy format operati...

CVE-2021-46936

CVE-2021-46936 affects the Linux kernel (net: fix use-after-free in tw_timer_handler). The flaw allowed use-after-free on net->mib.net_statistics when destroying a net namespace if inflight time-wait timers exist; it is triggered during path of timer handling and ip/mib teardown. The fix reloc...

CVE-2023-4623

CVE-2023-4623 describes a use-after-free in the Linux kernel’s net/sched sch_hfsc subsystem that can enable local privilege escalation. The issue occurs when a class uses a link-sharing curve (HFSC_FSC) and has a parent without one; init_vf() may call vttree_insert() on the parent, but update_vf(...

CVE-2019-11479

The CVE-2019-11479 family (SACK/MSS issues on the Linux kernel) stems from a hard-coded MSS of 48 bytes, enabling remote DoS via fragmented TCP handling. Public docs list CVE-2019-11477 (SACK Panic), CVE-2019-11478 (SACK Slowness/Excess Resource Usage), and CVE-2019-11479 (Low MSS) with kernel-wi...

CVE-2020-36776

In the Linux kernel, CVE-2020-36776 concerns the slab OOB issue in thermal/cpufreq_cooling. The vulnerability is triggered in cpu_power_to_freq() when the EM table does not contain a suitable power entry (power below OPP0), leading to a negative index read. The documented fix returns the lowest a...

CVE-2022-25636

CVE-2022-25636 affects the Linux kernel (5.4–5.6.10) via an out-of-bounds heap write in net/netfilter/nf_dup_netdev.c related to nf_tables_offload. This enables local privilege escalation. The connected documents confirm the affected range and the heap OOB write, but do not provide a detailed fix...

CVE-2024-26875

The CVE-2024-26875 entry affects Linux kernel media: pvrusb2, where risk came from a use-after-free in pvr2_context_set_notify due to a race with pvr2_context_disconnect involving a disconnect_flag. The provided fix moves the disconnect_flag assignment to after all code in pvr2_context_disconnect...

CVE-2023-52440

The CVE-2023-52440 vulnerability concerns ksmbd in the Linux kernel where a slub overflow can occur during key exchange if authblob->SessionKey.Length exceeds CIFS_KEY_SIZE. The root cause is in ksmbd_decode_ntlmssp_auth_blob() and the subsequent copy to the session key array via cifs_arc4_cry...

CVE-2019-3846

CVE-2019-3846 affects the upstream kernel’s Marvell mwifiex wireless kernel driver. The description documents a memory corruption flaw that could allow privilege escalation when connecting to a malicious wireless network. Connected sources confirm this is within the mwifiex driver and describe th...

CVE-2021-46948

CVE-2021-46948 relates to the Linux kernel sfc/farch driver. The TX queue lookup in TX event handling could start from a TXQ label instead of a TXQ type, causing efx_channel_get_tx_queue() to potentially return NULL and trigger a NULL dereference/panic. The advisory states this vulnerability was ...

CVE-2021-46949

CVE-2021-46949 concerns the Linux kernel sfc (Solarflare) network driver path: farch TX queue lookup during TX flush done handling. The root cause is starting TXQ processing from a TXQ instance number (qid) rather than a TXQ type, which could cause efx_get_tx_queue() to return NULL and trigger pa...

CVE-2019-17666

CVE-2019-17666 affects the Linux kernel Realtek rtlwifi driver (rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c). The root cause is a missing upper-bound check that leads to a buffer overflow. Impact stated in sources includes memory corruption and potential remote code execution, wit...

CVE-2014-0196

CVE-2014-0196 affects the Linux kernel (through 3.14.3) specifically the n_tty_write function in drivers/tty/n_tty.c. The flaw permits a local user to trigger a race condition between read and write operations with long strings in the LECHO & !OPOST case, enabling denial of service (memory corrup...

CVE-2020-24588

The CVE-2020-24588 entry relates to the 802.11 Wi‑Fi fragmentation/ A‑MSDU handling issue where the plaintext QoS header flag isn’t authenticated, enabling an attacker to inject packets by sending non‑SSP A‑MSDU frames (FragAttacks). Connected Astra Linux advisories describe this as a variant of ...

CVE-2021-46925

CVE-2021-46925 affects the Linux kernel’s net/smc: a race between smc_cdc_tx_handler() and smc_release() can lead to a use-after-free of smc_sock, causing a kernel panic when CDC messages are in flight. The root cause is a race where smc_cdc_tx_handler() may access a smc_sock that has already bee...

CVE-2020-12888

CVE-2020-12888 affects the Linux kernel VFIO PCI driver (through 5.6.13) and arises from improper handling of accesses to disabled MMIO space. A local attacker or a guest VM with VFIO access could trigger a denial of service or crash by exploiting writes/reads to disabled memory regions. Connecte...

CVE-2021-46912

CVE-2021-46912 affects the Linux kernel where tcp_allowed_congestion_control was global/writable and leaked across net namespaces. The issue was that ipv4_net_table entries (tcp_available_congestion_control and tcp_allowed_congestion_control) had NULL data pointers and their proc handlers referen...

CVE-2019-15505

CVE-2019-15505 affects the technisat-usb2 media driver in Linux kernels up to 5.2.9. The issue arises from improper validation of incoming IR packets, leading to a heap buffer over-read. An attacker capable of adding USB devices (potentially via remote USB technologies like usbip/usbredir) could ...

CVE-2021-29650

CVE-2021-29650 affects the Linux kernel prior to 5.11.11. The netfilter subsystem (net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h) may omit a full memory barrier when a new table value is assigned, enabling a local attacker to trigger a DoS/panic in netfilter. The issue is docume...

CVE-2021-46910

CVE-2021-46910 affects the Linux kernel ARM MM fixing path in kmap_local: when CONFIG_DEBUG_KMAP_LOCAL is enabled, per-CPU fixmap slots can grow and collide with the virtual DT mapping, potentially triggering an OOPS on systems with many CPUs. The disclosed remediation in the provided materials i...

CVE-2023-52441

CVE-2023-52441 affects the Linux kernel ksmbd component. The vulnerability is an out-of-bounds issue in init_smb2_rsp_hdr() that occurs when a client issues an SMB2 negotiate followed by SMB1 negotiate; the code could incorrectly treat SMB1 packets as SMB2, triggering an out-of-bounds path. The a...

CVE-2021-29154

CVE-2021-29154 affects the Linux kernel BPF JIT implementation (arch/x86 net/bpf_jit_comp.c and bpf_jit_comp32.c). Connected advisories (e.g., ALAS2KERNEL-5.4-2022-003) confirm a local privilege escalation due to incorrect computation of branch displacements in the BPF JIT, enabling arbitrary cod...

CVE-2019-11478

CVE-2019-11478 describes a DoS in the Linux kernel TCP SACK handling where the TCP retransmission queue can fragment, leading to degraded performance or denial of service when processing crafted SACK sequences. The initial entry notes a fixed commit f070ef2ac66716357066b683fb0baf55f8191a2e and st...

CVE-2019-14835

The CVE-2019-14835 entry describes a buffer overflow in Linux kernel vhost functionality (virtqueue buffers translated to IOVs) during VM live migration. A privileged guest user could pass descriptors with invalid length while migration is underway, potentially causing a host privilege escalation...

CVE-2022-3564

CVE-2022-3564 is a high-severity Linux kernel vulnerability involving a use-after-free in the Bluetooth subsystem, specifically the function l2cap_reassemble_sdu() in net/bluetooth/l2cap_core.c . Connected advisories (CentOS, AlmaLinux, AlmaLinux-RT, Astra Linux, and others) confirm the same weak...

CVE-2021-22543

CVE-2021-22543 is described in connected advisories as a local privilege-escalation through KVM and improper handling of VM_IO|VM_PFNMAP VMAs, which can bypass RO checks and allow reading/writing guest memory by a privileged VM operator. Technical details across sources indicate the vulnerability...

CVE-2019-14821

CVE-2019-14821 is a Linux kernel KVM issue: an out-of-bounds access in the Coalesced MMIO write path can occur if a host user controls the MMIO ring buffer indices (ring->first/ring->last). A local attacker with /dev/kvm access could crash the host kernel or potentially escalate privileges ...

CVE-2021-33034

CVE-2021-33034 is a use-after-free in Linux kernel before 5.12.4 in net/bluetooth/hci_event.c when destroying an hci_chan, enabling arbitrary writes. Affected: Linux kernel before 5.12.4 (Bluetooth HCI driver). Mitigation: upgrade to 5.12.4 or later (ChangeLog-5.12.4).

CVE-2023-42754

CVE-2023-42754 is a vulnerability in the Linux kernel IPv4 stack: a NULL pointer dereference where skb may not be bound to a device before __ip_options_compile if the skb is re-routed by ipvs. The impact is a local crash under CAP_NET_ADMIN. Public details in connected advisories reaffirm the iss...

CVE-2021-46931

CVE-2021-46931 involves the Linux kernel mlx5e path (net/mlx5e, mlx5_core) where a TX-timeout-recovery flow calls mlx5e_tx_reporter_dump_sq() with a void* that is actually a mlx5e_tx_timeout_ctx*. The mismatch corrupts stack state and can trigger a kernel panic/stack overflow. The fix adds a wrap...

CVE-2021-46908

CVE-2021-46908 affects the Linux kernel BPF verifier: the issue stems from using an incorrect permission flag for mixed signed bounds arithmetic. The fix ensures bypass_spec_v1 is used (instead of allow_ptr_leaks) to align with spectre v1 mitigation requirements. The vulnerability has been resolv...

CVE-2019-14283

CVE-2019-14283 affects the Linux kernel up to version 5.2.2, where floppy drive handling in set_geometry() in drivers/block/floppy.c fails to validate sect and head, enabling an integer overflow and out-of-bounds read. This can be triggered by an unprivileged local user when a floppy is present (...

CVE-2019-15902

CVE-2019-15902 describes a backporting error that reintroduced Spectre-v1 in ptrace_get_debugreg() due to swapped lines during cherry-picking. Affected Linux kernels include 4.4.x (up to 4.4.190), 4.9.x (up to 4.9.190), 4.14.x (up to 4.14.141), 4.19.x (up to 4.19.69), and 5.2.x (up to 5.2.11). Th...

CVE-2023-1206

CVE-2023-1206 describes a hash collision flaw in the Linux kernel’s IPv6 connection lookup table that can allow a local attacker or a user with high bandwidth to cause significant CPU spike (up to 95%) on the server accepting IPv6 connections. Connected advisories show this CVE being addressed in...

CVE-2021-41864

CVE-2021-41864 affects the Linux kernel (pre-5.14.12) in prealloc_elems_and_freelist() within kernel/bpf/stackmap.c. An unprivileged local user can trigger an eBPF multiplication overflow, causing an out-of-bounds write and potential memory corruption or system crash. The issue is fixed in Linux ...

CVE-2023-52435

CVE-2023-52435 affects the Linux kernel’s net/ skb_segment() and can overflow MSS when computing mss = mss * partial_segs, risking a crash (e.g., GSO_BY_FRAGS) and triggering NULL pointer dereferences in some traces. The fix adds a guard to ensure the new MSS is smaller than GSO_BY_FRAGS, prevent...

CVE-2024-1086

CVE-2024-1086 is a use-after-free in Linux kernel nf_tables (netfilter). The vulnerability stems from nft_verdict_init() allowing positive values as drop errors in the hook verdict, enabling nf_hook_slow() to trigger a double-free when NF_DROP is issued with a drop error resembling NF_ACCEPT. Exp...

CVE-2020-25705

CVE-2020-25705 is a Linux kernel ICMP handling flaw that lets an off-path attacker bypass UDP source port randomization and rapidly scan open UDP ports. Affected products include various kernel versions and embedded/Linux-based devices; remediation is via kernel updates (e.g., CentOS/AlmaLinux ad...

CVE-2018-18955

CVE-2018-18955 affects Linux kernels 4.15.x–4.19.x, with privilege escalation via map_write() in kernel/user_namespace.c when nested user namespaces have more than 5 UID/GID ranges. A user with CAP_SYS_ADMIN in the affected namespace can bypass controls outside the namespace (e.g., read /etc/shad...

CVE-2021-46952

Summary (CVE-2021-46952): In the Linux kernel, NFS with UDP transport was vulnerable to a shift-out-of-bounds due to a garbage UDP retrans timeout being passed to xprt_calc_majortimeo. If retrans is >= 64, the mount fails with an error, preventing exploitation. The fix is a patch to validate U...