High Memory corruption

CVE-2022-49948 — vt: Clear selection before changing the font

In the Linux kernel, the following vulnerability has been resolved: vt: Clear selection before changing the font When changing the console font with ioctl(KDFONTOP) the new font size can be bigger than the previous font. A previous selection may thus now be outside of the new screen size and thus trigger out-of-bounds accesses to graphics memory if the selection is removed in vc_do_resize(). Prevent such out-of-memory accesses by dropping the selection before the various con_font_set() console handlers are called.

Published Jun 18, 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

0.27%

ahead of 18% of scored CVEs · Oct 15, 2026

Affects

Linux

Linux and 1 more

CVSS base

7.1

High · 4 source(s)

Prioritization reference: 7.8 provisional

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

Total

partial · total control of the vulnerable component

Remediation

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

Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)

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, Linux Linux Kernel).
Apply the fixed version or the patch documented under Remediation.
Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 3.2.85 and < 3.3version e60f8fcce05042e8f8cea25ee81fecc1222114cfversion 5812a9bc9d68a82c2cc839f88e6f7a05093ab39dversion 863ad19fd654c485e3beec3575c4d74a1e74369eversion dbc3fd44f957a39407e889287bf61fa0ef3ecc14version 0b2a0a58ad22f9d6dfc641bc5ec46057493f22a5version 9f2d48f0745f921040df91bfe8fa7f0339cd7497version 3425e397fb23cc2e8e6fb8f5b8226dcb447e84dd and 17 more version eeae0a12a16650ff494d5faefa371cd9e7079575≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515 and < 566f9c9f89337792070b5a6062dff448b3e7977f≥ 3.10.105 and < 3.11≥ 3.12.68 and < 3.13≥ 3.16.40 and < 3.17≥ 3.18.45 and < 3.19≥ 4.1.36 and < 4.2≥ 4.4.31 and < 4.5≥ 4.8.7 and < 4.9version 4.9≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515 and < c904fe03c4bd1f356a58797d39e2a5d0ca15cefc≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515 and < 2535431ae967ad17585513649625fea7db28d4db≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515 and < 989201bb8c00b222235aff04e6200230d29dc7bb≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515 and < 1cf1930369c9dc428d827b60260c53271bff3285≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515 and < f74b4a41c5d7c9522469917e3072e55d435efd9e≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515 and < e9ba4611ddf676194385506222cce7b0844e708e≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515 and < c555cf04684fde39b5b0dd9fd80730030ee10c4a	Vulnerable	CVE Program (cve.org) e CISA ADP
Linux	Linux Kernel	≥ 4.10 and < 4.14.293< 4.9.328≥ 4.15 and < 4.19.258≥ 4.20 and < 5.4.213≥ 5.5 and < 5.10.142≥ 5.11 and < 5.15.66≥ 5.16 and < 5.19.8version 6.0-rc1 and 2 more version 6.0-rc2version 6.0-rc3	Vulnerable	NIST National Vulnerability Database

Attack characteristics

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

Attack vector

Local

Attack complexity

Low

Privileges required

Low

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
7.8	CVSS 3.1	High	1.8	5.9	416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database
7.8	CVSS 3.1	High	—	—	Linux via CVE Program (cve.org) e CISA ADP
7.1	CVSS 3.1	High	1.8	5.2	nvd@nist.gov via NIST National Vulnerability Database
7.1	CVSS 3.1	High	—	—	GitHub, Inc. via GitHub Security Advisories

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H (score shown at the top: nvd@nist.gov)

Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 7.8 (416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-125 · Out-of-bounds Read

Other CVEs with this weakness →

Detection

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

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.

endpoint telemetry (EDR)crash dumps

Timeline

What happened to this CVE, newest first.

2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
Fix documented
Oct 15, 2026 · NIST National Vulnerability Database
Affected products added · linux/linux kernel
Oct 15, 2026 · NIST National Vulnerability Database
CVSS changed · 7.1
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Modified
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · Alertas do Telegram
2025
CVE published
Jun 18, 2025 · Linux

Source activity

Repeated readings are counted rather than listed.

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

References

10 on the record

git.kernel.org/stable/c/e9ba4611ddf676194385506222cce7b0844e708e
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/c555cf04684fde39b5b0dd9fd80730030ee10c4a
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/f74b4a41c5d7c9522469917e3072e55d435efd9e
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/2535431ae967ad17585513649625fea7db28d4db
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/989201bb8c00b222235aff04e6200230d29dc7bb
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977f
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/1cf1930369c9dc428d827b60260c53271bff3285
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/c904fe03c4bd1f356a58797d39e2a5d0ca15cefc
Patch, NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2022-49948
GitHub Security Advisories
github.com/advisories/GHSA-r6pw-rw8p-5cr9
GitHub Security Advisories

Elsewhere on this site

Linux
every CVE for this vendor

Memory corruption
same class

CWE-125
other pages naming this weakness

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 15h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 15h
Unknown CVE-2026-98431 RDMA/uverbs: Fix mmap_lock/disassociation_lock circular dependency 1d
Unknown CVE-2026-98430 RDMA/efa: Keep admin queues alive while IRQ is registered 1d
Unknown CVE-2026-98429 RDMA/efa: Keep EQ resources alive while IRQ is registered 1d
Unknown CVE-2026-98428 ALSA: usb: 6fire: Avoid embedded URBs 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 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-2022-49948 is "vt: Clear selection before changing the font", 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 7.1 describes technical severity. EPSS 0.27% 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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