Unknown

CVE-2026-89879 — media: s2255: bound JPEG frame size before copying into the buffer

In the Linux kernel, the following vulnerability has been resolved: media: s2255: bound JPEG frame size before copying into the buffer s2255_fillbuff() memcpy()s vc->jpg_size bytes of a captured JPEG/MJPEG frame into the vb2 plane. vc->jpg_size is taken verbatim from the S2255_MARKER_FRAME header the device sends (pdword[4] in save_frame()) and, unlike the frame payload length just above it, is never bounded: payload = le32_to_cpu(pdword[3]); if (payload > vc->req_image_size) /* payload is checked ... */ return -EINVAL; vc->pkt_size = payload; vc->jpg_size = le32_to_cpu(pdword[4]); /* ... jpg_size is not */ A malicious or malfunctioning device can therefore report a jpg_size larger than the destination vb2 plane, and the memcpy() writes past it. jpg_size is a signed int, so a value with the top bit set also turns into a huge length. Reject a frame whose jpg_size is negative or exceeds the plane size before copying it.

Published Sep 16, 2026 · Updated Oct 19, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+2

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.21%

ahead of 11% of scored CVEs · Oct 20, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 and < 32a595dd3e8634544e5cfbc47f906dff3d3c1ef8≥ 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 and < 4b6f7bccc6559ae5c54573c284fe76eafc9989b2≥ 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 and < 2542516a147bfad740e7e411c251b639fad260ff≥ 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 and < 79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77≥ 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 and < d2ecaaab6a4f165abb54cdf61be60030b5782bf8≥ 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 and < 68d664f1b4efe525e99154b7058fcb0378bdaff7≥ 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 and < dd739517560c8d0ec4463a53e717bf40b988d7da≥ 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 and < e504cc888f42999dd76b6a43788c422610f2aad2 and 1 more version 2.6.27	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 20, 2026 · 5 reading(s) · max 0.21%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 16, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 19, 2026 – Oct 19, 2026
1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

10 on the record

git.kernel.org/stable/c/4b6f7bccc6559ae5c54573c284fe76eafc9989b2
NIST National Vulnerability Database
git.kernel.org/stable/c/79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77
NIST National Vulnerability Database
git.kernel.org/stable/c/2542516a147bfad740e7e411c251b639fad260ff
NIST National Vulnerability Database
git.kernel.org/stable/c/dd739517560c8d0ec4463a53e717bf40b988d7da
NIST National Vulnerability Database
git.kernel.org/stable/c/d2ecaaab6a4f165abb54cdf61be60030b5782bf8
NIST National Vulnerability Database
github.com/advisories/GHSA-w8vh-2wxg-frpg
GitHub Security Advisories
nvd.nist.gov/vuln/detail/CVE-2026-89879
GitHub Security Advisories
git.kernel.org/stable/c/68d664f1b4efe525e99154b7058fcb0378bdaff7
NIST National Vulnerability Database
git.kernel.org/stable/c/e504cc888f42999dd76b6a43788c422610f2aad2
NIST National Vulnerability Database
git.kernel.org/stable/c/32a595dd3e8634544e5cfbc47f906dff3d3c1ef8
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-98866 sched/cache: Introduce task_struct->sched_cache_grp to fix UAF 2d
Unknown CVE-2026-98867 dm-pcache: bound the logical key offset from persistent memory 2d
Unknown CVE-2026-98868 dm-pcache: reject a kset that overruns its segment 2d
Unknown CVE-2026-98856 kprobes: Skip disarmed probes when checking optkprobe overlap 2d
Unknown CVE-2026-98857 ipvs: bound LBLCR and LBLC cache growth 2d
Unknown CVE-2026-98858 io_uring: fix task_work add use-after-free with SQPOLL 2d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-89879 is "media: s2255: bound JPEG frame size before copying into the buffer", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.21% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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