Answer in brief
CVE-2026-64550 records a High severity (CVSS 7.3) vulnerability in net: qualcomm: rmnet: validate MAP frame length before ingress parsing. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ceed73a2cf4aff2921802aa3d21d45280677547d <ed25befc8c36f896b5878f9078faddb67fd7e2d0 || >=ceed73a2cf4aff2921802aa3d21d45280677547d <a54d76d176e50d2fdbd39b7231efe256170339e4 || >=ceed73a2cf4aff2921802aa3d21d45280677547d <00f4c366dbca16a40772c3b7ec2d8cba839e9724 || >=ceed73a2cf4aff2921802aa3d21d45280677547d <3868c3244369ab709a90c9aad7534d406009b824 || >=ceed73a2cf4aff2921802aa3d21d45280677547d <14eb0c9491385d5361a292ea4974aec0e6887299 || >=ceed73a2cf4aff2921802aa3d21d45280677547d <1b12612c367e4be9b0814c0468e7e687835315b4 || >=ceed73a2cf4aff2921802aa3d21d45280677547d <231a8a4b76cb1b1827b3b19d7b3603642f5aaaef || >=ceed73a2cf4aff2921802aa3d21d45280677547d <f0f1887a9e30712a1df03e152dce6fb91344b1f3 | ed25befc8c36f896b5878f9078faddb67fd7e2d0, a54d76d176e50d2fdbd39b7231efe256170339e4, 00f4c366dbca16a40772c3b7ec2d8cba839e9724, 3868c3244369ab709a90c9aad7534d406009b824, 14eb0c9491385d5361a292ea4974aec0e6887299, 1b12612c367e4be9b0814c0468e7e687835315b4, 231a8a4b76cb1b1827b3b19d7b3603642f5aaaef, f0f1887a9e30712a1df03e152dce6fb91344b1f3 |
| Linux/Linuxgeneric | 4.14 | Not reported |
Published upstream
Jul 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.