High

CVE-2023-53803 — scsi: ses: Fix slab-out-of-bounds in ses_enclosure_data_process()

In the Linux kernel, the following vulnerability has been resolved: scsi: ses: Fix slab-out-of-bounds in ses_enclosure_data_process() A fix for: BUG: KASAN: slab-out-of-bounds in ses_enclosure_data_process+0x949/0xe30 [ses] Read of size 1 at addr ffff88a1b043a451 by task systemd-udevd/3271 Checking after (and before in next loop) addl_desc_ptr[1] is sufficient, we expect the size to be sanitized before first access to addl_desc_ptr[1]. Make sure we don't walk beyond end of page.

Published Dec 8, 2025 · Updated Oct 15, 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 0.3% (30-day exploitation probability)+3
Technical severity (high)+6

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

0.29%

ahead of 20% of scored CVEs · Oct 15, 2026

Affects

Linux

CVSS base

8.1

High · 3 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

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	≥ 21fab1d0595eacf781705ec3509012a28f298245 and < da1a955c48a16e16e925d6544793914e52a6fa51≥ 21fab1d0595eacf781705ec3509012a28f298245 and < 9e5c7d52085b8c84bc82a261580f0eb170039325≥ 21fab1d0595eacf781705ec3509012a28f298245 and < 467afb1dd630d8c6d172bd6cacc125199b5f4f2d≥ 21fab1d0595eacf781705ec3509012a28f298245 and < e4dd25da784b2e07dbfbf04509afa4c5a1375227≥ 21fab1d0595eacf781705ec3509012a28f298245 and < 2b28a7d261cb309912596d6a2d383ca370483527≥ 21fab1d0595eacf781705ec3509012a28f298245 and < 0dfe68394cbe1d4fe579fb325ecc813c50528c5a≥ 21fab1d0595eacf781705ec3509012a28f298245 and < 799e8dd2022d2e13f0c5c1906b40ceca07a23349≥ 21fab1d0595eacf781705ec3509012a28f298245 and < 9b4f5028e493cb353a5c8f5c45073eeea0303abd and 1 more version 2.6.32	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Adjacent

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
8.1	CVSS 3.1	High	2.8	5.2	416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database
8.1	CVSS 3.1	High	—	—	GitHub, Inc. via GitHub Security Advisories
8.1	CVSS 3.1	High	—	—	Linux via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H (score shown at the top: 416baaa9-dc9f-4396-8d5f-8c081fb06d67)

EPSS over time FIRST

Oct 13, 2026 → Oct 15, 2026 · 3 reading(s) · max 0.29%

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
SSVC assessment updated
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Affected products added · linux/linux
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
CVSS changed · 8.1
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Deferred
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
2025
CVE published
Dec 8, 2025 · Linux

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 15, 2026 – Oct 15, 2026
1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

10 on the record

nvd.nist.gov/vuln/detail/CVE-2023-53803
GitHub Security Advisories
github.com/advisories/GHSA-7mw7-q5qp-mcqq
GitHub Security Advisories
git.kernel.org/stable/c/9e5c7d52085b8c84bc82a261580f0eb170039325
NIST National Vulnerability Database
git.kernel.org/stable/c/9b4f5028e493cb353a5c8f5c45073eeea0303abd
NIST National Vulnerability Database
git.kernel.org/stable/c/da1a955c48a16e16e925d6544793914e52a6fa51
NIST National Vulnerability Database
git.kernel.org/stable/c/2b28a7d261cb309912596d6a2d383ca370483527
NIST National Vulnerability Database
git.kernel.org/stable/c/e4dd25da784b2e07dbfbf04509afa4c5a1375227
NIST National Vulnerability Database
git.kernel.org/stable/c/0dfe68394cbe1d4fe579fb325ecc813c50528c5a
NIST National Vulnerability Database
git.kernel.org/stable/c/799e8dd2022d2e13f0c5c1906b40ceca07a23349
NIST National Vulnerability Database
git.kernel.org/stable/c/467afb1dd630d8c6d172bd6cacc125199b5f4f2d
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 10h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 10h
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d
Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 1d

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 fixed version, patch or mitigation documented.
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-2023-53803 is "scsi: ses: Fix slab-out-of-bounds in ses_enclosure_data_process()", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.1 describes technical severity. EPSS 0.29% 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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