7.5

CVE-2026-74678: linux

CVSS: 7.5v3.1HighReceived
AliasesUBUNTU-CVE-2026-74678DEBIAN-CVE-2026-74678
Published 22-08-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-74678 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 39.9% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.48%
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 2 · Related 1
MGASA-2026-0506USN-8886-1

Timeline

  1. 22-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup() When the interface has NETIF_F_SG enabled and skb_linearize() fails in ax88179_tx_fixup(), the function returns NULL without freeing the skb. usbnet_start_xmit() treats a NULL return from tx_fixup() as a drop (info->flags does not set FLAG_MULTI_PACKET for this driver), jumping to the "drop" label where it does `if (skb) dev_kfree_skb_any(skb)`. Because tx_fixup() returned NULL, the local skb variable in usbnet_start_xmit() is NULL, so the original skb is never freed — a memory leak on every TX frame whose linearization fails (i.e. under memory pressure). Free the skb before returning, matching the error handling already used for the pskb_expand_head() failure path in the same function.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

0.00 pp

From 0.48% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.48%

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

Ubuntu142 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 | < 7.1.9-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ 16b1c4e01c89ba07367461e0bc4cb84993c2d027, < 83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b | ≥ 16b1c4e01c89ba07367461e0bc4cb84993c2d027, < 1c63303659a2264bd55d9813df74cb4caeed5922 | ≥ 16b1c4e01c89ba07367461e0bc4cb84993c2d027, < 2be5091fa693b9119ad25a8bb8c149d236a23ade | ≥ 16b1c4e01c89ba07367461e0bc4cb84993c2d027, < 58733b1dd46bb231d9d279c132a20ee46da1b664 | ≥ 16b1c4e01c89ba07367461e0bc4cb84993c2d027, < 4039cd807a5a46dc5f7618fffae926b8ad8455eb | ≥ 16b1c4e01c89ba07367461e0bc4cb84993c2d027, < 1f428e30947395d9b9aacee03e25a4e6cfcad7a4 | 5.17

3 vendors · 145 products

References

11 links
Show all 11 references