NVD / CVE Program· CNA Linux

CVE-2024-26875: media: pvrusb2: fix uaf in pvr2_context_set_notify

Noroxi assessment

Priority: Monitor (action score 25/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.24% (FIRST EPSS).
Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. Special conditions such as timing or configuration are required.
Fixed version: Linux Linux 0a0b79ea55de8514e1750884e5fec77f9fdd01ee, 3a1ec89708d2e57e2712f46241282961b1a7a475, 40cd818fae875c424a8335009db33c7b5a07de3a.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0a0b79ea55de8514e1750884e5fec77f9fdd01ee, 3a1ec89708d2e57e2712f46241282961b1a7a475, 40cd818fae875c424a8335009db33c7b5a07de3a or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix uaf in pvr2_context_set_notify [Syzbot reported] BUG: KASAN: slab-use-after-free in pvr2_context_set_notify+0x2c4/0x310 drivers/media/usb/pvrusb2/pvrusb2-context.c:35 Read of size 4 at addr ffff888113aeb0d8 by task kworker/1:1/26 CPU: 1 PID: 26 Comm: kworker/1:1 Not tainted 6.8.0-rc1-syzkaller-00046-gf1a27f081c1f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: usb_hub_wq hub_event Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc4/0x620 mm/kasan/report.c:488 kasan_report+0xda/0x110 mm/kasan/report.c:601 pvr2_context_set_notify+0x2c4/0x310 drivers/media/usb/pvrusb2/pvrusb2-context.c:35 pvr2_context_notify drivers/media/usb/pvrusb2/pvrusb2-context.c:95 [inline] pvr2_context_disconnect+0x94/0xb0 drivers/media/usb/pvrusb2/pvrusb2-context.c:272 Freed by task 906: kasan_save_stack+0x33/0x50 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:640 poison_slab_object mm/kasan/common.c:241 [inline] __kasan_slab_free+0x106/0x1b0 mm/kasan/common.c:257 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2121 [inline] slab_free mm/slub.c:4299 [inline] kfree+0x105/0x340 mm/slub.c:4409 pvr2_context_check drivers/media/usb/pvrusb2/pvrusb2-context.c:137 [inline] pvr2_context_thread_func+0x69d/0x960 drivers/media/usb/pvrusb2/pvrusb2-context.c:158 [Analyze] Task A set disconnect_flag = !0, which resulted in Task B's condition being met and releasing mp, leading to this issue. [Fix] Place the disconnect_flag assignment operation after all code in pvr2_context_disconnect() to avoid this issue.

MediumCVSS 6.4 · v3.1—No exploit Fix available

Memory safety

BDU:2025-03615

Published: Apr 17, 2024
Updated: Oct 15, 2026
EPSS: 0.2% · 16th percentile
CWE: CWE-416

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 25 / 40 · 6.4 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernel2.6.26 and later · before 4.19.311
linux linux kernel4.20 and later · before 5.4.273
linux linux kernel5.5 and later · before 5.10.214
linux linux kernel5.11 and later · before 5.15.153
linux linux kernel5.16 and later · before 6.1.83
linux linux kernel6.2 and later · before 6.6.23
linux linux kernel6.7 and later · before 6.7.11
linux linux kernel6.8 and later · before 6.8.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

Linux Linux
- 2.6.26affected
- e5be15c63804e05b5a94197524023702a259e308 and later · before ed8000e1e8e9684ab6c30cf2b526c0cea039929caffected · git
- e5be15c63804e05b5a94197524023702a259e308 and later · before d29ed08964cec8b9729bc55c7bb23f679d7a18fbaffected · git
- e5be15c63804e05b5a94197524023702a259e308 and later · before ab896d93fd6a2cd1afeb034c3cc9226cb499209faffected · git
- e5be15c63804e05b5a94197524023702a259e308 and later · before eb6e9dce979c08210ff7249e5e0eceb8991bfcd7affected · git
- e5be15c63804e05b5a94197524023702a259e308 and later · before 3a1ec89708d2e57e2712f46241282961b1a7a475affected · git
- e5be15c63804e05b5a94197524023702a259e308 and later · before 8e60b99f6b7ccb3badeb512f5eb613ad45904592affected · git
- e5be15c63804e05b5a94197524023702a259e308 and later · before 40cd818fae875c424a8335009db33c7b5a07de3aaffected · git
- e5be15c63804e05b5a94197524023702a259e308 and later · before eaa410e05bdf562c90b23cdf2d9327f9c4625e16affected · git
- e5be15c63804e05b5a94197524023702a259e308 and later · before 0a0b79ea55de8514e1750884e5fec77f9fdd01eeaffected · git

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.85-1	6.1.85-1
Debian:13	linux	before 6.7.12-1	6.7.12-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
90Now
CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
89Now
CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
85Now

Published before and after this one in the same product

← EarlierCVE-2024-26872Apr 17, 2024 · RDMA/srpt: Do not register event handler until srpt device is fully setup
28Monitor
← EarlierCVE-2024-26873Apr 17, 2024 · scsi: hisi_sas: Fix a deadlock issue related to automatic dump
22Monitor
Later →CVE-2024-26876Apr 17, 2024 · drm/bridge: adv7511: fix crash on irq during probe
22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	0a0b79ea55de8514e1750884e5fec77f9fdd01ee	Vendor (CNA)
Linux Linux	3a1ec89708d2e57e2712f46241282961b1a7a475	Vendor (CNA)
Linux Linux	40cd818fae875c424a8335009db33c7b5a07de3a	Vendor (CNA)
Linux Linux	8e60b99f6b7ccb3badeb512f5eb613ad45904592	Vendor (CNA)
Linux Linux	ab896d93fd6a2cd1afeb034c3cc9226cb499209f	Vendor (CNA)
Linux Linux	d29ed08964cec8b9729bc55c7bb23f679d7a18fb	Vendor (CNA)
Linux Linux	eaa410e05bdf562c90b23cdf2d9327f9c4625e16	Vendor (CNA)
Linux Linux	eb6e9dce979c08210ff7249e5e0eceb8991bfcd7	Vendor (CNA)
Linux Linux	ed8000e1e8e9684ab6c30cf2b526c0cea039929c	Vendor (CNA)
debian:linux	6.1.85-1 · Debian:12	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-24-0494 · May 16, 2024(Linux Kernel Güncellemesi)

All national notices →

Technical details

Attack conditions

Someone with local access to the system can trigger it.
Administrator privileges are required.
No user action is required.
Special conditions such as timing or configuration are required.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: High
Privileges required: High
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

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

nvd-secondary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

Fix✗ → ✓Sep 28, 2026, 10:09 PM UTC

For records you follow, these changes also arrive as notifications. →

References

git.kernel.org/stable/c/0a0b79ea55de8514e1750884e5fec77f9fdd01ee

Show all references (11 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records