01 Record

CVE-2026-74597

ip6_tunnel: clear skb2->cb[] in ip6ip6_err()

CriticalPUBLISHEDCNA: Linux

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

ip6_tunnel: clear skb2->cb[] in ip6ip6_err()

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.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpacttotalSuccessful exploitation gives total 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

0.54% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 45.3% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Received. NVD last modified this record on 2026-10-16.

Red Hat severity

Important. 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

2026-08-22 15:31Z2 MO AGO

Last updated

2026-10-16 19:06Z13 DAYS AGO

Reserved

2026-08-15

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

8b538785175038eb9d27dc0c6580ef7d572dfc2dd4e37901c9d2524f9088b9c6

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxe490d1d85cf5e191791979e5f260d32eb4f703a8 to < 44fe898df302e91c5ee5acbc71ffa74e78e6c183, e490d1d85cf5e191791979e5f260d32eb4f703a8 to < 0dadb0620ab65949a8bc2439dd28ea3c942fe87d, e490d1d85cf5e191791979e5f260d32eb4f703a8 to < b6816536a2990c0db44a26130a03e40b441e829b, e490d1d85cf5e191791979e5f260d32eb4f703a8 to < 64e41736a26f37ab6215bc2e6df125df05aceb08, e490d1d85cf5e191791979e5f260d32eb4f703a8 to < 484134e1eb07d700a73b1e4bbf3fb503e299be60, e490d1d85cf5e191791979e5f260d32eb4f703a8 to < 4eb15c465337b18f44716c499cd6ad63eee0ad54, e490d1d85cf5e191791979e5f260d32eb4f703a8 to < fbf40faa0414b753212494ad197542002e66ed9e, e490d1d85cf5e191791979e5f260d32eb4f703a8 to < f803c086399da277b5d0ff36a107d0f162751800, 2.6.22—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/44fe898df302e91c5ee5acbc71ffa74e78e6c183
git.kernel.orghttps://git.kernel.org/stable/c/0dadb0620ab65949a8bc2439dd28ea3c942fe87d
git.kernel.orghttps://git.kernel.org/stable/c/b6816536a2990c0db44a26130a03e40b441e829b
git.kernel.orghttps://git.kernel.org/stable/c/64e41736a26f37ab6215bc2e6df125df05aceb08
git.kernel.orghttps://git.kernel.org/stable/c/484134e1eb07d700a73b1e4bbf3fb503e299be60
git.kernel.orghttps://git.kernel.org/stable/c/4eb15c465337b18f44716c499cd6ad63eee0ad54
git.kernel.orghttps://git.kernel.org/stable/c/fbf40faa0414b753212494ad197542002e66ed9e
git.kernel.orghttps://git.kernel.org/stable/c/f803c086399da277b5d0ff36a107d0f162751800

07 Fixed in

Debian 12

linux
Fixed in 6.1.187-1
linux-6.12
Fixed in 6.12.107-1~deb12u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.105-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 7.1.9-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.