CVE-2026-64550
net: qualcomm: rmnet: validate MAP frame length before ingress parsing
Description
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.
INFO
Published Date :
July 27, 2026, 9:17 p.m.
Last Modified :
July 27, 2026, 9:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-64550
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Add MAP header bounds check.
- Validate packet length before parsing.
- Apply the vendor provided patch.
- Update the Linux kernel.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64550.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64550 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64550
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64550 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64550 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 27, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'ceed73a2cf4aff2921802aa3d21d45280677547d', 'lessThan': 'ed25befc8c36f896b5878f9078faddb67fd7e2d0', 'versionType': 'git'}, {'status': 'affected', 'version': 'ceed73a2cf4aff2921802aa3d21d45280677547d', 'lessThan': 'a54d76d176e50d2fdbd39b7231efe256170339e4', 'versionType': 'git'}, {'status': 'affected', 'version': 'ceed73a2cf4aff2921802aa3d21d45280677547d', 'lessThan': '00f4c366dbca16a40772c3b7ec2d8cba839e9724', 'versionType': 'git'}, {'status': 'affected', 'version': 'ceed73a2cf4aff2921802aa3d21d45280677547d', 'lessThan': '3868c3244369ab709a90c9aad7534d406009b824', 'versionType': 'git'}, {'status': 'affected', 'version': 'ceed73a2cf4aff2921802aa3d21d45280677547d', 'lessThan': '14eb0c9491385d5361a292ea4974aec0e6887299', 'versionType': 'git'}, {'status': 'affected', 'version': 'ceed73a2cf4aff2921802aa3d21d45280677547d', 'lessThan': '1b12612c367e4be9b0814c0468e7e687835315b4', 'versionType': 'git'}, {'status': 'affected', 'version': 'ceed73a2cf4aff2921802aa3d21d45280677547d', 'lessThan': '231a8a4b76cb1b1827b3b19d7b3603642f5aaaef', 'versionType': 'git'}, {'status': 'affected', 'version': 'ceed73a2cf4aff2921802aa3d21d45280677547d', 'lessThan': 'f0f1887a9e30712a1df03e152dce6fb91344b1f3', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c', 'drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h', 'drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.14'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.14', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c', 'drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h', 'drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c'], 'defaultStatus': 'affected'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/00f4c366dbca16a40772c3b7ec2d8cba839e9724 Added Reference https://git.kernel.org/stable/c/14eb0c9491385d5361a292ea4974aec0e6887299 Added Reference https://git.kernel.org/stable/c/1b12612c367e4be9b0814c0468e7e687835315b4 Added Reference https://git.kernel.org/stable/c/231a8a4b76cb1b1827b3b19d7b3603642f5aaaef Added Reference https://git.kernel.org/stable/c/3868c3244369ab709a90c9aad7534d406009b824 Added Reference https://git.kernel.org/stable/c/a54d76d176e50d2fdbd39b7231efe256170339e4 Added Reference https://git.kernel.org/stable/c/ed25befc8c36f896b5878f9078faddb67fd7e2d0 Added Reference https://git.kernel.org/stable/c/f0f1887a9e30712a1df03e152dce6fb91344b1f3