7.8

CVE-2026-74668: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-74668DEBIAN-CVE-2026-74668
Published 22-08-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-74668 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.2% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
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 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: packet: use consistent hard_header_len in TX_RING send path tpacket_snd() reads dev->hard_header_len independently for skb allocation and header construction in tpacket_fill_skb(). Concurrent netdevice reconfiguration can therefore make the reserved headroom smaller than the amount later pushed, or make copylen - hard_header_len negative. Snapshot hard_header_len once before processing ring frames and use it for the frame limit, headroom allocation, copy length, and skb construction. Pass the snapshot to tpacket_fill_skb(). The separate SOCK_DGRAM consistency problem between hard_header_len and header_ops->create is not addressed here.

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

Ubuntu169 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≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < 9c7e8ff48c377bef18c3d178748aea0575b69ede | ≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < 2a73b2c37ee3060a880b53cd24783d93fc7be5f8 | ≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < e79f59a8527a49078cfaf8fe8fb5fcefc20c76d2 | ≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < d85d2fd54e901637c81d847811e03c662aee13cd | ≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < 016763e829cac37b3234eace86fd0a4c560de4a7 | ≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < 27e068d1b35dbec10a3cf268887c94407be4badc | ≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < d48ea5c9c4c34dc0df621f0e39ed3a16b644621a | ≥ 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1, < 21b5953e7494c16a42e6cd8cf110e18d13ae4a6b | 2.6.31

3 vendors · 172 products

References

13 links
Show all 13 references