CVE-2026-23265

Medium

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on node footer in {read,write}_end_io -----------[ cut here ]------------ kernel BUG at fs/f2fs/data.c:358! Call Trace: <IRQ> blk_update_request+0x5eb/0xe70 block/blk-mq.c:987 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1149 blk_complete_reqs block/blk-mq.c:1224 [inline] blk_done_softirq+0x107/0x160 block/blk-mq.c:1229 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 </IRQ> In f2fs_write_end_io(), it detects there is inconsistency in between node page index (nid) and footer.nid of node page. If footer of node page is corrupted in fuzzed image, then we load corrupted node page w/ async method, e.g. f2fs_ra_node_pages() or f2fs_ra_node_page(), in where we won't do sanity check on node footer, once node page becomes dirty, we will encounter this bug after node page writeback.

Package Linux Kernel
Published 2026-03-18
Last modified 2026-05-29
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

5.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 3.8 and later are affected. Fixed in 6.18.13, 6.19.3, 7.0 and their respective stable series.

Affected from
≥ 3.8
Fixed in
✓ 6.18.13 6.18.x ✓ 6.19.3 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-23265 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Frequently asked questions

  • What is CVE-2026-23265?

    CVE-2026-23265 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 3.8 onward and has been patched in 6.18.13, 6.19.3 and 7.0. CVE-2026-23265 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2026-23265?

    CVE-2026-23265 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2026-23265?

    Yes — CVE-2026-23265 has been patched. Fixed versions include 6.18.13, 6.19.3 and 7.0. If you are running Linux kernel 3.8 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-23265 actively exploited?

    No — CVE-2026-23265 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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