7.3

CVE-2026-64550: linux

CVSS: 7.3v3.1HighReceived
AliasesUBUNTU-CVE-2026-64550DEBIAN-CVE-2026-64550
Published 27-07-2026Last modified 17-08-2026
Open JSON

Vulnerability summary

CVE-2026-64550 is a high (CVSS 7.3) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2% of scored vulnerabilities.

Overall risk
29/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.3/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 18 · Related 16
MGASA-2026-0336MGASA-2026-0337OPENSUSE-SU-2026:11476-1USN-8875-1USN-8875-2USN-8876-1

Timeline

  1. 27-07-2026
    PublishedVulnerability first disclosed.
  2. 17-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.13%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu168 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-147.147 | < 7.0.0-38.38
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1067.70 | < 7.0.0-1014.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.180-1 | < 6.12.100-1 | < 7.1.5-1
  • linux-6.12< 6.12.100-1~deb12u1
Linux1 product
  • linux≥ ceed73a2cf4aff2921802aa3d21d45280677547d, < ed25befc8c36f896b5878f9078faddb67fd7e2d0 | ≥ ceed73a2cf4aff2921802aa3d21d45280677547d, < a54d76d176e50d2fdbd39b7231efe256170339e4 | ≥ ceed73a2cf4aff2921802aa3d21d45280677547d, < 00f4c366dbca16a40772c3b7ec2d8cba839e9724 | ≥ ceed73a2cf4aff2921802aa3d21d45280677547d, < 3868c3244369ab709a90c9aad7534d406009b824 | ≥ ceed73a2cf4aff2921802aa3d21d45280677547d, < 14eb0c9491385d5361a292ea4974aec0e6887299 | ≥ ceed73a2cf4aff2921802aa3d21d45280677547d, < 1b12612c367e4be9b0814c0468e7e687835315b4 | ≥ ceed73a2cf4aff2921802aa3d21d45280677547d, < 231a8a4b76cb1b1827b3b19d7b3603642f5aaaef | ≥ ceed73a2cf4aff2921802aa3d21d45280677547d, < f0f1887a9e30712a1df03e152dce6fb91344b1f3 | 4.14

3 vendors · 171 products

References

28 links
Show all 28 references