CVE-2024-40923
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
In the Linux kernel, the vmxnet3 driver has a vulnerability where after a failed memory allocation for the RX data ring, the desc_size field is not reset, causing the hypervisor to reference invalid memory during packet reception. This leads to a kernel panic (BUG) in skb_panic.
Risk Assessment
An attacker could trigger a system crash (kernel panic) by causing memory pressure, resulting in denial of service (DoS). The vulnerability affects systems using VMware virtualization with the vmxnet3 interface.
Recommendation
Immediately update the Linux kernel to a version containing the fix (setting desc_size to 0 after failed allocation). If not possible, mitigate risk by monitoring memory availability and avoiding system overload.
Other vulnerabilities in Linux kernel
See all- CVE-2026-93204Unknown
In the Linux kernel, the batman-adv module's dat handling updated MAC addresses using a simple copy, which could be partially observed by parallel readers. A reader might transport a half-updated MAC address over the network or use it in ARP responses, poisoning the ARP cache. The fix uses atomic64_t to store the 48-bit MAC address, ensuring readers see either the old or new address, never a mixture.
- CVE-2026-93202Unknown
A bug in the Linux kernel's I3C subsystem causes recursive locking during registration of new I3C devices. The function i3c_master_register_new_i3c_devs() registers devices while holding i3c_bus_normaluse_lock(), and device_register() can immediately trigger a probe callback that tries to acquire the same lock again, leading to a deadlock. The fix separates device creation from registration and uses the maintenance lock.
- CVE-2026-93200Unknown
The Linux kernel's i3c master subsystem had a use-after-free vulnerability in the master->this pointer. Sysfs attribute callbacks dereferenced master->this, which was freed in i3c_master_detach_free_devs() before the master device was released. The fix keeps master->this alive until i3c_masterdev_release() and resets it on error paths.
- CVE-2026-93199Unknown
In the Linux kernel, the i3c_master_search_i3c_dev_duplicate() function that searches for duplicate I3C devices can incorrectly match the master device itself (master->this), returning the controller as a duplicate. Since the controller is not a target device, it cannot be a duplicate of one. The fix excludes master->this from matching.
- CVE-2026-93198Unknown
In the Linux kernel, the dm-pcache module does not validate the persisted dirty_tail chain at load. A crafted image, whose on-media fields are authenticated only by a crc32c with a fixed seed, can aim dirty_tail at a chain of last ksets that never terminates, causing cache_writeback_fn() to re-arm itself forever. The fix adds validation of the dirty_tail chain at load with a hop cap.
- CVE-2026-93197Unknown
A bug in the Linux kernel's memcg subsystem causes LRU size accounting to be copied to the parent instead of moved when a memory cgroup is offlined, leaving stale counters on the child. This makes the LRU (or MGLRU) scanner read phantom sizes and grind through empty lists on dying cgroups, over-budgeting limits and wasting CPU. On one host, counters described 476 GiB of pages—1.89x the machine's RAM.
- CVE-2026-93195Unknown
In the Linux kernel, the drm/bridge synopsys dw-dp driver initializes and registers the DisplayPort AUX channel during dw_dp_bind(), but never unregisters it. This may lead to resource leaks and/or use-after-free. The fix adds the missing dw_dp_unbind() function to allow cleanup.
- CVE-2026-93194Unknown
In the Linux kernel, the drm/rockchip dw_dp driver initializes and registers core resources such as the DisplayPort AUX channel during dw_dp_bind(), but never unregisters them. This leads to memory leaks and/or use-after-free, as shown in a KASAN report. The issue is fixed by using the exported dw_dp_unbind() function in the component's unbind() callback and in its bind() error path.
- CVE-2026-93193Unknown
In the Linux kernel, the drm/rockchip analogix_dp driver has an OF node reference leak in rockchip_dp_drm_encoder_enable(), because of_get_child_by_name() does not call of_node_put() symmetrically. The fix uses __free(device_node) to automatically manage reference release.
- CVE-2026-93191Unknown
In the Linux kernel, smack_msg_queue_msgrcv() incorrectly checks permissions of the 'current' task instead of the 'target' task. In the pipelined_send() optimization path, the sender checks on behalf of the receiver, so an unauthorized receiver can get the message, violating Smack MAC policy. The fix checks permissions on the 'target' task.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: vmxnet3: disable rx data ring on dma allocation failure When vmxnet3_rq_create() fails to allocate memory for rq->data_ring.base, the subsequent call to vmxnet3_rq_destroy_all_rxdataring does not reset rq->data_ring.desc_size for the data ring that failed, which presumably causes the hypervisor to reference it on packet reception. To fix this bug, rq->data_ring.desc_size needs to be set to 0 to tell the hypervisor to disable this feature. [ 95.436876] kernel BUG at net/core/skbuff.c:207! [ 95.439074] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 95.440411] CPU: 7 PID: 0 Comm: swapper/7 Not tainted 6.9.3-dirty #1 [ 95.441558] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 12/12/2018 [ 95.443481] RIP: 0010:skb_panic+0x4d/0x4f [ 95.444404] Code: 4f 70 50 8b 87 c0 00 00 00 50 8b 87 bc 00 00 00 50 ff b7 d0 00 00 00 4c 8b 8f c8 00 00 00 48 c7 c7 68 e8 be 9f e8 63 58 f9 ff <0f> 0b 48 8b 14 24 48 c7 c1 d0 73 65 9f e8 a1 ff ff ff 48 8b 14 24 [ 95.447684] RSP: 0018:ffffa13340274dd0 EFLAGS: 00010246 [ 95.448762] RAX: 0000000000000089 RBX: ffff8fbbc72b02d0 RCX: 000000000000083f [ 95.450148] RDX: 0000000000000000 RSI: 00000000000000f6 RDI: 000000000000083f [ 95.451520] RBP: 000000000000002d R08: 0000000000000000 R09: ffffa13340274c60 [ 95.452886] R10: ffffffffa04ed468 R11: 0000000000000002 R12: 0000000000000000 [ 95.454293] R13: ffff8fbbdab3c2d0 R14: ffff8fbbdbd829e0 R15: ffff8fbbdbd809e0 [ 95.455682] FS: 0000000000000000(0000) GS:ffff8fbeefd80000(0000) knlGS:0000000000000000 [ 95.457178] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 95.458340] CR2: 00007fd0d1f650c8 CR3: 0000000115f28000 CR4: 00000000000406f0 [ 95.459791] Call Trace: [ 95.460515] <IRQ> [ 95.461180] ? __die_body.cold+0x19/0x27 [ 95.462150] ? die+0x2e/0x50 [ 95.462976] ? do_trap+0xca/0x110 [ 95.463973] ? do_error_trap+0x6a/0x90 [ 95.464966] ? skb_panic+0x4d/0x4f [ 95.465901] ? exc_invalid_op+0x50/0x70 [ 95.466849] ? skb_panic+0x4d/0x4f [ 95.467718] ? asm_exc_invalid_op+0x1a/0x20 [ 95.468758] ? skb_panic+0x4d/0x4f [ 95.469655] skb_put.cold+0x10/0x10 [ 95.470573] vmxnet3_rq_rx_complete+0x862/0x11e0 [vmxnet3] [ 95.471853] vmxnet3_poll_rx_only+0x36/0xb0 [vmxnet3] [ 95.473185] __napi_poll+0x2b/0x160 [ 95.474145] net_rx_action+0x2c6/0x3b0 [ 95.475115] handle_softirqs+0xe7/0x2a0 [ 95.476122] __irq_exit_rcu+0x97/0xb0 [ 95.477109] common_interrupt+0x85/0xa0 [ 95.478102] </IRQ> [ 95.478846] <TASK> [ 95.479603] asm_common_interrupt+0x26/0x40 [ 95.480657] RIP: 0010:pv_native_safe_halt+0xf/0x20 [ 95.481801] Code: 22 d7 e9 54 87 01 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d 93 ba 3b 00 fb f4 <e9> 2c 87 01 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 [ 95.485563] RSP: 0018:ffffa133400ffe58 EFLAGS: 00000246 [ 95.486882] RAX: 0000000000004000 RBX: ffff8fbbc1d14064 RCX: 0000000000000000 [ 95.488477] RDX: ffff8fbeefd80000 RSI: ffff8fbbc1d14000 RDI: 0000000000000001 [ 95.490067] RBP: ffff8fbbc1d14064 R08: ffffffffa0652260 R09: 00000000000010d3 [ 95.491683] R10: 0000000000000018 R11: ffff8fbeefdb4764 R12: ffffffffa0652260 [ 95.493389] R13: ffffffffa06522e0 R14: 0000000000000001 R15: 0000000000000000 [ 95.495035] acpi_safe_halt+0x14/0x20 [ 95.496127] acpi_idle_do_entry+0x2f/0x50 [ 95.497221] acpi_idle_enter+0x7f/0xd0 [ 95.498272] cpuidle_enter_state+0x81/0x420 [ 95.499375] cpuidle_enter+0x2d/0x40 [ 95.500400] do_idle+0x1e5/0x240 [ 95.501385] cpu_startup_entry+0x29/0x30 [ 95.502422] start_secondary+0x11c/0x140 [ 95.503454] common_startup_64+0x13e/0x141 [ 95.504466] </TASK> [ 95.505197] Modules linked in: nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ip ---truncated---