CVE-2024-27026 (GCVE-0-2024-27026)

Vulnerability from cvelistv5 – Published: 2024-05-01 12:49 – Updated: 2026-08-05 11:29
VLAI
Title
vmxnet3: Fix missing reserved tailroom
Summary
In the Linux kernel, the following vulnerability has been resolved: vmxnet3: Fix missing reserved tailroom Use rbi->len instead of rcd->len for non-dataring packet. Found issue: XDP_WARN: xdp_update_frame_from_buff(line:278): Driver BUG: missing reserved tailroom WARNING: CPU: 0 PID: 0 at net/core/xdp.c:586 xdp_warn+0xf/0x20 CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W O 6.5.1 #1 RIP: 0010:xdp_warn+0xf/0x20 ... ? xdp_warn+0xf/0x20 xdp_do_redirect+0x15f/0x1c0 vmxnet3_run_xdp+0x17a/0x400 [vmxnet3] vmxnet3_process_xdp+0xe4/0x760 [vmxnet3] ? vmxnet3_tq_tx_complete.isra.0+0x21e/0x2c0 [vmxnet3] vmxnet3_rq_rx_complete+0x7ad/0x1120 [vmxnet3] vmxnet3_poll_rx_only+0x2d/0xa0 [vmxnet3] __napi_poll+0x20/0x180 net_rx_action+0x177/0x390
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:44 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 54f00cce11786742bd11e5e68c3bf85e6dc048c9 , < aba8659caf88017507419feea06069f529329ea6 (git)
Affected: 54f00cce11786742bd11e5e68c3bf85e6dc048c9 , < 7c8505ecc2d15473d679b8e06335434b84fffe86 (git)
Affected: 54f00cce11786742bd11e5e68c3bf85e6dc048c9 , < 91d017d19d5a9ad153e2dc23ed3c0e2e79ef5262 (git)
Affected: 54f00cce11786742bd11e5e68c3bf85e6dc048c9 , < e127ce7699c1e05279ee5ee61f00893e7bfa9671 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.23 , ≤ 6.6.* (semver)
Unaffected: 6.7.11 , ≤ 6.7.* (semver)
Unaffected: 6.8.2 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "product_status:known_affected": "42",
      "product_status:known_not_affected": "157",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: vmxnet3: Fix missing reserved tailroom",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-27026.json",
      "version": "3"
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                  "value": "AV:N - The bug is triggered purely by an inbound Ethernet frame arriving on the vmxnet3 vNIC and being processed in the NAPI receive path (`vmxnet3_rq_rx_complete` \u2192 `vmxnet3_process_xdp`); any remote host that can route a \u003e946-byte packet to the VM reaches the vulnerable code. No local access to the target is needed.\nAC:L - The attacker fully controls the only condition that matters \u2014 packet size \u2014 and any ordinary frame above ~946 bytes (a single ICMP echo or one TCP segment of a bulk transfer) deterministically hits `xdp-\u003edata_end \u003e xdp_data_hard_end(xdp)`. There is no race, no memory-layout dependency, and no state the attacker cannot influence.\nPR:N - The vulnerable code runs on packet receive before any authentication, authorization, or socket demultiplexing; the attacker needs no account or credentials on the target, only the ability to send a frame to its vmxnet3 interface.\nUI:N - Processing happens automatically in the driver\u0027s NAPI poll routine as soon as the packet is received; no action by any user or administrator on the victim system is required.\nS:U - The WARN, the packet drop, and any resulting panic are all confined to the kernel of the host running the vmxnet3 driver \u2014 the same security authority. No hypervisor, IOMMU, or sandbox boundary is crossed.\nC:N - The under-sized `frame_sz` only shrinks the region XDP is permitted to touch, so no out-of-bounds read occurs and `xdp_convert_buff_to_frame()` aborts before any data is forwarded. Nothing is returned to or readable by the attacker (the on-the-wire data leak came from the *later* `xdp_prepare_buff()` change, not from the pre-fix code).\nI:N - No out-of-bounds or overlapping write is possible \u2014 `vmxnet3_build_skb()` uses `PAGE_SIZE`, `bpf_xdp_adjust_tail()` is made more restrictive rather than less, and the error paths recycle the page exactly once with no double-free or state corruption.\nA:H - Every oversized frame executes a non-ratelimited `WARN(1, ...)` with a full stack dump from softirq context, letting an unauthenticated remote attacker flood the console/log at line rate (soft lockups, RCU stalls) and drop all XDP_REDIRECT/XDP_TX traffic; on kernels with `panic_on_warn=1` a single packet causes an immediate kernel panic."
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        "cveId": "CVE-2024-27026",
        "datePublished": "2024-05-01T12:49:31.685Z",
        "dateReserved": "2024-02-19T14:20:24.210Z",
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}



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