7.8

CVE-2024-26786: linux NULL Pointer Dereference

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2024-26786DEBIAN-CVE-2024-26786
Published 04-04-2024Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2024-26786 is a high (CVSS 7.8) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 13.2% 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
0.23%
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 8 · Related 7
RHSA-2024:9315SUSE-SU-2024:2135-1SUSE-SU-2024:2203-1SUSE-SU-2024:2973-1SUSE-SU-2025:20008-1SUSE-SU-2025:20028-1

Timeline

  1. 04-04-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: iommufd: Fix iopt_access_list_id overwrite bug Syzkaller reported the following WARN_ON: WARNING: CPU: 1 PID: 4738 at drivers/iommu/iommufd/io_pagetable.c:1360 Call Trace: iommufd_access_change_ioas+0x2fe/0x4e0 iommufd_access_destroy_object+0x50/0xb0 iommufd_object_remove+0x2a3/0x490 iommufd_object_destroy_user iommufd_access_destroy+0x71/0xb0 iommufd_test_staccess_release+0x89/0xd0 __fput+0x272/0xb50 __fput_sync+0x4b/0x60 __do_sys_close __se_sys_close __x64_sys_close+0x8b/0x110 do_syscall_x64 The mismatch between the access pointer in the list and the passed-in pointer is resulting from an overwrite of access->iopt_access_list_id, in iopt_add_access(). Called from iommufd_access_change_ioas() when xa_alloc() succeeds but iopt_calculate_iova_alignment() fails. Add a new_id in iopt_add_access() and only update iopt_access_list_id when returning successfully.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

0.00 pp

From 0.23% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.23%

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

Affected systems

Ubuntu65 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • 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-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ 9227da7816dd1a42e20d41e2244cb63c205477ca, < f1fb745ee0a6fe43f1d84ec369c7e6af2310fda9 | ≥ 9227da7816dd1a42e20d41e2244cb63c205477ca, < 9526a46cc0c378d381560279bea9aa34c84298a0 | ≥ 9227da7816dd1a42e20d41e2244cb63c205477ca, < aeb004c0cd6958e910123a1607634401009c9539 | 6.6
  • linux_kernel≥ 6.6, < 6.6.21 | ≥ 6.7, < 6.7.9 | 6.8:rc1 | 6.8:rc2 | 6.8:rc3 | 6.8:rc4 | 6.8:rc5 | 6.8:rc6
Debian1 product
  • linux< 6.7.9-1

3 vendors · 68 products

References

6 links