01 Record

CVE-2021-47309

net: validate lwtstate->data before returning from skb_tunnel_info()

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

net: validate lwtstate->data before returning from skb_tunnel_info()

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 16.2% of scored records. A rank, not a probability.

NVD base score

7.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-08-04.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2024-05-21 14:35Z2 YR AGO

Last updated

2026-08-05 08:47Z1 MO AGO

Reserved

2024-05-21

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

d31ed0519357516a1f9c2b18279bc0a5fb4c68dabf7918784763e596f228db75

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux61adedf3e3f1d3f032c5a6a299978d91eff6d555 to < e7f3c9df40515a6c6b46f36c4c94cf48a043f887, 61adedf3e3f1d3f032c5a6a299978d91eff6d555 to < b61d327cd3cc5ea591f3bf751dd11e034f388bb5, 61adedf3e3f1d3f032c5a6a299978d91eff6d555 to < 83bdcfbd968bcc91a0632b7b625e4a9b0cba5e0d, 61adedf3e3f1d3f032c5a6a299978d91eff6d555 to < 8bb1589c89e61e3b182dd546f1021928ebb5c2a6, 61adedf3e3f1d3f032c5a6a299978d91eff6d555 to < 8aa13a86964cdec4fd969ef677c6614ff068641a, 61adedf3e3f1d3f032c5a6a299978d91eff6d555 to < 2179d96ec702cc33ead02a9ce40ece599b8538c5, 61adedf3e3f1d3f032c5a6a299978d91eff6d555 to < a915379594f1e045421635c6316d8f3ffa018c58, 61adedf3e3f1d3f032c5a6a299978d91eff6d555 to < 67a9c94317402b826fc3db32afc8f39336803d97, 4.3—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/e7f3c9df40515a6c6b46f36c4c94cf48a043f887
git.kernel.orghttps://git.kernel.org/stable/c/b61d327cd3cc5ea591f3bf751dd11e034f388bb5
git.kernel.orghttps://git.kernel.org/stable/c/83bdcfbd968bcc91a0632b7b625e4a9b0cba5e0d
git.kernel.orghttps://git.kernel.org/stable/c/8bb1589c89e61e3b182dd546f1021928ebb5c2a6
git.kernel.orghttps://git.kernel.org/stable/c/8aa13a86964cdec4fd969ef677c6614ff068641a
git.kernel.orghttps://git.kernel.org/stable/c/2179d96ec702cc33ead02a9ce40ece599b8538c5
git.kernel.orghttps://git.kernel.org/stable/c/a915379594f1e045421635c6316d8f3ffa018c58
git.kernel.orghttps://git.kernel.org/stable/c/67a9c94317402b826fc3db32afc8f39336803d97

01 Record index

CVE-2021-47309

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-47309

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References