CVE-2026-63924: linux Untrusted Pointer Dereference

CVSS: 9.8v3.1CriticalAwaiting analysis

AliasesUBUNTU-CVE-2026-63924DEBIAN-CVE-2026-63924

Published 19-07-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-63924 is a critical (CVSS 9.8) Untrusted Pointer Dereference vulnerability in linux. EPSS estimates a 0.71% chance of exploitation in the next 30 days, higher than 52.8% 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

0.71%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedIn no KEV catalog

RansomwareNone recordedNo known use recorded

Public exploits0No public exploits recorded

Timeline

19-07-2026
PublishedVulnerability first disclosed.
19-10-2026
Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() ipv6_hop_jumbo() calls pskb_trim_rcsum(), which can change skb pointers. Let's recompute nh pointer to make sure any change won't mess things up.

CVSS metrics

4 scores · 4 sources · 1 version

v3.19.8

EPSS trend

Probability

0.71%

Chance of exploitation in the next 30 days

Percentile

53%

Versus all other CVEs

30-day change

0.00 pp

From 0.71% on 20-09-2026

20-09-202620-10-2026

EPSS score

0.71%

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

CWE-822Untrusted Pointer DereferenceThe product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer.

Affected systems

Ubuntu167 products

linuxAll versions (No fix recorded) | < 5.15.0-194.204 | < 6.8.0-142.142 | < 7.0.0-28.28
linux-allwinner-5.19All versions (No fix recorded)
linux-awsAll versions (No fix recorded) | < 5.15.0-1116.123 | < 6.8.0-1065.68 | < 7.0.0-1009.9
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)

linux-aws-5.13All versions (No fix recorded)
linux-aws-5.15< 5.15.0-1116.123~20.04.1
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4All versions (No fix recorded)
linux-aws-5.8All versions (No fix recorded)
linux-aws-6.14All versions (No fix recorded)
linux-aws-6.17All versions (No fix recorded)
linux-aws-6.2All versions (No fix recorded)
linux-aws-6.5All versions (No fix recorded)
linux-aws-6.8< 6.8.0-1065.68~22.04.1
linux-aws-fipsAll versions (No fix recorded) | < 5.15.0-1116.123+fips1 | < 6.8.0-1065.68+fips1
linux-aws-hweAll versions (No fix recorded)
linux-azureAll versions (No fix recorded) | < 5.15.0-1122.131 | < 6.8.0-1068.76 | < 7.0.0-1010.10
linux-azure-4.15All versions (No fix recorded)
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1122.131~20.04.1
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4All versions (No fix recorded)
linux-azure-5.8All versions (No fix recorded)
linux-azure-6.11All versions (No fix recorded)
linux-azure-6.14All versions (No fix recorded)
linux-azure-6.17All versions (No fix recorded)
linux-azure-6.2All versions (No fix recorded)
linux-azure-6.5All versions (No fix recorded)
linux-azure-6.8< 6.8.0-1068.76~22.04.1
linux-azure-7.0< 7.0.0-1014.14~24.04.1
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fdeAll versions (No fix recorded) | < 5.15.0-1121.130 | < 6.8.0-1066.73 | < 7.0.0-1009.9
linux-azure-fde-5.15< 5.15.0-1121.130~20.04.1
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fde-6.14All versions (No fix recorded)
linux-azure-fde-6.17All versions (No fix recorded)
linux-azure-fde-6.2All versions (No fix recorded)
linux-azure-fde-6.8< 6.8.0-1066.73~22.04.1
linux-azure-fde-7.0All versions (No fix recorded)
linux-azure-fipsAll versions (No fix recorded) | < 5.15.0-1122.131+fips1 | < 6.8.0-1068.76+fips1
linux-azure-nvidiaAll versions (No fix recorded)
linux-azure-nvidia-6.14All versions (No fix recorded)
linux-bluefieldAll versions (No fix recorded) | < 5.15.0-1100.102 | < 6.8.0-1031.36
linux-fipsAll versions (No fix recorded) | < 5.15.0-194.204+fips1 | < 6.8.0-142.142+fips1
linux-gcpAll versions (No fix recorded) | < 5.15.0-1117.127 | < 6.8.0-1069.77 | < 7.0.0-1008.8
linux-gcp-4.15All versions (No fix recorded)
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1118.128~20.04.1
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4All versions (No fix recorded)
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-6.11All versions (No fix recorded)
linux-gcp-6.14All versions (No fix recorded)
linux-gcp-6.17All versions (No fix recorded)
linux-gcp-6.2All versions (No fix recorded)
linux-gcp-6.5All versions (No fix recorded)
linux-gcp-6.8< 6.8.0-1069.77~22.04.1
linux-gcp-7.0< 7.0.0-1011.11~24.04.1
linux-gcp-fipsAll versions (No fix recorded) | < 5.15.0-1116.126+fips1 | < 6.8.0-1068.76+fips1
linux-gkeAll versions (No fix recorded) | < 5.15.0-1112.118 | < 6.8.0-1064.72 | < 7.0.0-1003.4
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15All versions (No fix recorded)
linux-gke-5.4All versions (No fix recorded)
linux-gkeopAll versions (No fix recorded) | < 5.15.0-1099.107 | < 6.8.0-1050.54
linux-gkeop-5.15All versions (No fix recorded)
linux-gkeop-5.4All versions (No fix recorded)
linux-hweAll versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-194.204~20.04.1
linux-hwe-5.19All versions (No fix recorded)
linux-hwe-5.4All versions (No fix recorded)
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-6.11All versions (No fix recorded)
linux-hwe-6.14All versions (No fix recorded)
linux-hwe-6.17All versions (No fix recorded)
linux-hwe-6.2All versions (No fix recorded)
linux-hwe-6.5All versions (No fix recorded)
linux-hwe-6.8All versions (No fix recorded)
linux-hwe-7.0< 7.0.0-28.28~24.04.1
linux-hwe-edgeAll versions (No fix recorded)
linux-ibmAll versions (No fix recorded) | < 5.15.0-1110.114 | < 6.8.0-1065.66 | < 7.0.0-1010.10
linux-ibm-5.15< 5.15.0-1110.114~20.04.1
linux-ibm-5.4All versions (No fix recorded)
linux-ibm-6.8< 6.8.0-1066.67~22.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded) | < 5.15.0-1108.110
linux-intel-iotg< 5.15.0-1111.117
linux-intel-iotg-5.15< 5.15.0-1111.117~20.04.1
linux-iotAll versions (No fix recorded)
linux-kvmAll versions (No fix recorded) | < 5.15.0-1108.113
linux-lowlatency< 5.15.0-194.204 | < 6.8.0-142.142.1
linux-lowlatency-hwe-5.15< 5.15.0-194.204~20.04.1
linux-lowlatency-hwe-5.19All versions (No fix recorded)
linux-lowlatency-hwe-6.11All versions (No fix recorded)
linux-lowlatency-hwe-6.2All versions (No fix recorded)
linux-lowlatency-hwe-6.5All versions (No fix recorded)
linux-lowlatency-hwe-6.8< 6.8.0-142.142.1~22.04.1
linux-lts-xenialAll versions (No fix recorded)
linux-nvidia< 5.15.0-1111.112 | < 6.8.0-1063.66 | < 7.0.0-1016.16
linux-nvidia-6.11All versions (No fix recorded)
linux-nvidia-6.17All versions (No fix recorded)
linux-nvidia-6.2All versions (No fix recorded)
linux-nvidia-6.5All versions (No fix recorded)
linux-nvidia-6.8< 6.8.0-1063.66~22.04.1
linux-nvidia-7.0< 7.0.0-1016.16~24.04.1
linux-nvidia-bos< 7.0.0-2016.16
linux-nvidia-lowlatency< 6.8.0-1063.66.1
linux-nvidia-tegra< 5.15.0-1068.70 | < 6.8.0-1035.38
linux-nvidia-tegra-5.15< 5.15.0-1068.70~20.04.1
linux-nvidia-tegra-igx< 5.15.0-1057.57
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14All versions (No fix recorded)
linux-oem-5.17All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0All versions (No fix recorded)
linux-oem-6.1All versions (No fix recorded)
linux-oem-6.11All versions (No fix recorded)
linux-oem-6.14All versions (No fix recorded)
linux-oem-6.17All versions (No fix recorded)
linux-oem-6.5All versions (No fix recorded)
linux-oem-6.8All versions (No fix recorded)
linux-oem-7.0< 7.0.0-1009.9
linux-oracleAll versions (No fix recorded) | < 5.15.0-1113.119 | < 6.8.0-1062.65 | < 7.0.0-1008.8
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.15< 5.15.0-1114.120~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4All versions (No fix recorded)
linux-oracle-5.8All versions (No fix recorded)
linux-oracle-6.14All versions (No fix recorded)
linux-oracle-6.17All versions (No fix recorded)
linux-oracle-6.5All versions (No fix recorded)
linux-oracle-6.8< 6.8.0-1062.65~22.04.1
linux-oracle-7.0< 7.0.0-1011.11~24.04.1
linux-raspiAll versions (No fix recorded) | < 5.15.0-1110.113 | < 6.8.0-1065.69 | < 7.0.0-1015.15
linux-raspi-5.4All versions (No fix recorded)
linux-raspi-realtimeAll versions (No fix recorded) | < 6.8.0-2054.56
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1115.124 | < 6.8.1-1060.61 | < 7.0.0-28.28.1
linux-realtime-6.14All versions (No fix recorded)
linux-realtime-6.17All versions (No fix recorded)
linux-realtime-6.8< 6.8.1-1060.61~22.04.1
linux-riscvAll versions (No fix recorded) | < 7.0.0-28.28.1
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1110.114~20.04.1
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-riscv-6.14All versions (No fix recorded)
linux-riscv-6.17All versions (No fix recorded)
linux-riscv-6.5All versions (No fix recorded)
linux-riscv-6.8< 6.8.0-142.142~22.04.1
linux-riscv-7.0< 7.0.0-28.28.1~24.04.3
linux-starfive-5.19All versions (No fix recorded)
linux-starfive-6.2All versions (No fix recorded)
linux-starfive-6.5All versions (No fix recorded)
linux-xilinxAll versions (No fix recorded)
linux-xilinx-zynqmpAll versions (No fix recorded) | < 5.15.0-1079.83

Show all 167

Debian1 product

linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.12-1

Linux1 product

linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b3ac54e5c905f86d22b502eacb5686a282c5659f | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 645b99b1a185c91a79bdac4c5de0f91b212d64f0 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9e883eaa878f4337b5873c706efb5a192364ed18 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < bddaa4dfc7f36e1ee343a0622f69288af2b9ace9 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 72af7beae774e46ed543f3f2f267bf0a141bfcdd | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c512e1c819dfbf6ae95ee7a44b65b9ad98979157 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2b56bbd928c030894c270cd33d60286326919458 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d47548a36639095939f4747d4c43f2271366f565 | 2.6.12

3 vendors · 169 products

References

36 links

Show all 36 references

git.kernel.org/linus/d47548a36639095939f4747d4c43f2271366f565REPORT
ubuntu.com/security/notices/USN-8593-1Advisory
ubuntu.com/security/notices/USN-8603-1Advisory
ubuntu.com/security/notices/USN-8618-1Advisory
ubuntu.com/security/notices/USN-8663-1Advisory
ubuntu.com/security/notices/USN-8664-1Advisory
ubuntu.com/security/notices/USN-8728-1Advisory
ubuntu.com/security/notices/USN-8781-1Advisory
ubuntu.com/security/notices/USN-8728-2Advisory
ubuntu.com/security/notices/USN-8817-1Advisory
ubuntu.com/security/notices/USN-8818-1Advisory
ubuntu.com/security/notices/USN-8818-2Advisory
ubuntu.com/security/notices/USN-8842-1Advisory
ubuntu.com/security/notices/USN-8728-3Advisory
ubuntu.com/security/notices/USN-8818-3Advisory
ubuntu.com/security/notices/USN-8818-4Advisory
ubuntu.com/security/notices/USN-8817-2Advisory
ubuntu.com/security/notices/USN-8849-1Advisory
ubuntu.com/security/notices/USN-8817-3Advisory
ubuntu.com/security/notices/USN-8818-5Advisory
ubuntu.com/security/notices/USN-8818-6Advisory
ubuntu.com/security/notices/USN-8871-1Advisory
ubuntu.com/security/notices/USN-8878-1Advisory
ubuntu.com/security/notices/USN-8879-1Advisory
ubuntu.com/security/notices/USN-8906-1Advisory
security-tracker.debian.org/tracker/CVE-2026-63924Advisory

Vulnerability summary

Advisory lineage

Timeline

Description

CVSS metrics

EPSS trend

Known exploited

Public exploits

Weaknesses

Affected systems

References

Related vulnerabilities