5.5

CVE-2025-37759: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2025-37759DEBIAN-CVE-2025-37759
Published 01-05-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-37759 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 7.8% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.19%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 19 · Related 19
USN-7594-1USN-7594-2USN-7594-3USN-8028-1USN-8028-2USN-8028-3

Timeline

  1. 01-05-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ublk: fix handling recovery & reissue in ublk_abort_queue() Commit 8284066946e6 ("ublk: grab request reference when the request is handled by userspace") doesn't grab request reference in case of recovery reissue. Then the request can be requeued & re-dispatch & failed when canceling uring command. If it is one zc request, the request can be freed before io_uring returns the zc buffer back, then cause kernel panic: [ 126.773061] BUG: kernel NULL pointer dereference, address: 00000000000000c8 [ 126.773657] #PF: supervisor read access in kernel mode [ 126.774052] #PF: error_code(0x0000) - not-present page [ 126.774455] PGD 0 P4D 0 [ 126.774698] Oops: Oops: 0000 [#1] SMP NOPTI [ 126.775034] CPU: 13 UID: 0 PID: 1612 Comm: kworker/u64:55 Not tainted 6.14.0_blk+ #182 PREEMPT(full) [ 126.775676] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014 [ 126.776275] Workqueue: iou_exit io_ring_exit_work [ 126.776651] RIP: 0010:ublk_io_release+0x14/0x130 [ublk_drv] Fixes it by always grabbing request reference for aborting the request.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

+0.01 pp

From 0.18% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.19%

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

Ubuntu112 products
  • linux< 6.8.0-100.100
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1046.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8284066946e6d9cc979566ce698fe24e7ca0b31e, < caa5c8a2358604f38bf0a4afaa5eacda13763067 | ≥ 8284066946e6d9cc979566ce698fe24e7ca0b31e, < 5d34a30efac9c9c93e150130caa940c0df6053c1 | ≥ 8284066946e6d9cc979566ce698fe24e7ca0b31e, < 0a21d259ca4d6310fdfcc0284ebbc000e66cbf70 | ≥ 8284066946e6d9cc979566ce698fe24e7ca0b31e, < 6ee6bd5d4fce502a5b5a2ea805e9ff16e6aa890f | 6.5
  • linux_kernel≥ 6.5, < 6.12.24 | ≥ 6.13, < 6.13.12 | ≥ 6.14, < 6.14.3 | 6.15:rc1
Debian1 product
  • linux< 6.12.25-1

3 vendors · 115 products

References

27 links
Show all 27 references