High 7.3Published Jul 27, 2026

CVE-2026-64550net: qualcomm: rmnet: validate MAP frame length before ingress parsing

Updated under an hour ago (Oct 26, 2026, 8:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: net: qualcomm: rmnet: validate MAP frame length before ingress parsing When ingress deaggregation is disabled, rmnet_map_ingress_handler() passes the skb straight to __rmnet_map_ingress_handler(), skipping the length validation that rmnet_map_deaggregate() performs on the aggregated path. The parser then dereferences the MAP header and csum header/trailer based on the on-wire pkt_len without checking skb->len, so a short frame is read out of bounds: BUG: KASAN: slab-out-of-bounds in rmnet_map_checksum_downlink_packet Read of size 1 at addr ffff88801118ed00 by task exploit/147 Call Trace: ... rmnet_map_checksum_downlink_packet (drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:413) __rmnet_map_ingress_handler (drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:96) rmnet_rx_handler (drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:129) __netif_receive_skb_core.constprop.0 (net/core/dev.c:6089) netif_receive_skb (net/core/dev.c:6460) tun_get_user (drivers/net/tun.c:1955) tun_chr_write_iter (drivers/net/tun.c:2001) vfs_write (fs/read_write.c:688) ksys_write (fs/read_write.c:740) do_syscall_64 (arch/x86/entry/syscall_64.c:94) ... Factor that validation out of rmnet_map_deaggregate() into rmnet_map_validate_packet_len() and run it on the no-aggregation path too. The MAP header is bounds-checked first, since this path can receive a frame shorter than the header.

CVSS: 7.3 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Aug 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from ceed73a2cf4aff2921802aa3d21d45280677547d before ed25befc8c36f896b5878f9078faddb67fd7e2d0; from ceed73a2cf4aff2921802aa3d21d45280677547d before a54d76d176e50d2fdbd39b7231efe256170339e4; from ceed73a2cf4aff2921802aa3d21d45280677547d before 00f4c366dbca16a40772c3b7ec2d8cba839e9724; from ceed73a2cf4aff2921802aa3d21d45280677547d before 3868c3244369ab709a90c9aad7534d406009b824; from ceed73a2cf4aff2921802aa3d21d45280677547d before 14eb0c9491385d5361a292ea4974aec0e6887299; from ceed73a2cf4aff2921802aa3d21d45280677547d before 1b12612c367e4be9b0814c0468e7e687835315b4; from ceed73a2cf4aff2921802aa3d21d45280677547d before 231a8a4b76cb1b1827b3b19d7b3603642f5aaaef; from ceed73a2cf4aff2921802aa3d21d45280677547d before f0f1887a9e30712a1df03e152dce6fb91344b1f3	CNA record

References

References

https://git.kernel.org/stable/c/ed25befc8c36f896b5878f9078faddb67fd7e2d0
https://git.kernel.org/stable/c/a54d76d176e50d2fdbd39b7231efe256170339e4
https://git.kernel.org/stable/c/00f4c366dbca16a40772c3b7ec2d8cba839e9724
https://git.kernel.org/stable/c/3868c3244369ab709a90c9aad7534d406009b824
https://git.kernel.org/stable/c/14eb0c9491385d5361a292ea4974aec0e6887299
https://git.kernel.org/stable/c/1b12612c367e4be9b0814c0468e7e687835315b4
https://git.kernel.org/stable/c/231a8a4b76cb1b1827b3b19d7b3603642f5aaaef
https://git.kernel.org/stable/c/f0f1887a9e30712a1df03e152dce6fb91344b1f3

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.