9.8

CVE-2026-74737: linux

CVSS: 9.8v3.1CriticalReceived
AliasesUBUNTU-CVE-2026-74737DEBIAN-CVE-2026-74737
Published 26-08-2026Last modified 27-08-2026
Open JSON

Vulnerability summary

CVE-2026-74737 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 45.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.55%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 14 · Related 13
MGASA-2026-0506OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23881-1SUSE-SU-2026:23887-1SUSE-SU-2026:23897-1SUSE-SU-2026:23902-1

Timeline

  1. 26-08-2026
    PublishedVulnerability first disclosed.
  2. 27-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG On the packet reception path, the ID of the MAC Port on which the packet was received, is embedded in the RX DMA Descriptor's metadata. The ID is extracted using the helper function cppi5_desc_get_tags_ids() which fills in the 16-bit Source Tag into the 'port_id' variable. However, it is only the lower 8-bits of the 16-bit Source Tag that represent the MAC Port ID, while the upper 8-bits are Hardware-Reserved and carry an arbitrary value. With the existing logic, sporadic kernel crash is observed due to the subsequent driver code accessing out-of-bound memory because of an invalid port_id. Hence, fix the port_id extraction logic to use only the lower 8-bits of the Source Tag as the MAC Port ID.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.55%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

-0.01 pp

From 0.56% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.55%

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

Ubuntu157 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.105-1 | < 7.1.10-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < 14fc40bf28390e0ebee6a072457c36b82c614100 | ≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < 1c0e35ce761131f82062222779d8574849790892 | ≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < 9a220225efd6f58350bbb53fe70bdec08519267f | ≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < 551688b410d3fb0dae7739724422f268cd9446d6 | ≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < 46a8e084a159e638ac2728e96980b65d752d65fd | ≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < 72e4e3d7efc3b7d85f86abbe8b94f8e45074abe3 | ≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < 914e0100df3435bd14d09f397238e891cf9b7dce | ≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < 36a05d2820077bb3955acb8111e1041d39148037 | 5.7

3 vendors · 160 products

References

13 links
Show all 13 references