Polkit: regression in cve-2026-4897 fix (polkit read_cookie()) - stack buffer underflow
CVSS score
3.5
EPSS probability
—
Risk score
0.3
Published
3 h ago
Kanıt listesindeki ürün ve sürüm eşleşmesini kontrol edin; bazı varyantlar hâlâ etkileniyor olabilir.
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%55
Short explanation
A flaw in polkit within read_cookie() causes an integer underflow and out-of-bounds memory read in the authentication agent helper when processing input beginning with a null byte, potentially leading to a Denial of Service (DoS).
This vulnerability puts the stability of affected products at risk because crafted input can trigger an application crash and lead to a Denial of Service (DoS).
What should be done?
- Follow official vendor advisories
- Review related updates
Chain of evidence and sources
Polkit içinde tamsayı düşüşü ve sınır dışı bellek okumasına yol açan bir kusur bulunmaktadır.
Hazırlanan girdiler uygulama çökmesine ve Hizmet Engelleme durumuna neden olabilir.
Show the technical text from the sources
A flaw was found in polkit. When processing input that begins with a null byte, an arithmetic error in the authentication agent helper causes an integer underflow during buffer length calculation, resulting in an out-of-bounds memory read. An attacker capable of supplying crafted input can trigger this flaw, potentially causing an application crash and resulting in a Denial of Service (DoS).
CVSS vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CWE: CWE-125
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-85498 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | Red Hat | Red Hat Hardened Images | View |
| 2 | Red Hat | Red Hat Enterprise Linux 10 | View |
| 3 | Red Hat | Red Hat Enterprise Linux 6 | View |
| 4 | Red Hat | Red Hat Enterprise Linux 7 | View |
| 5 | Red Hat | Red Hat Enterprise Linux 8 | View |
| 6 | Red Hat | Red Hat Enterprise Linux 9 | View |
| 7 | Red Hat | Red Hat OpenShift Container Platform 4 | View |
| 8 | debian | policykit-1 (sid) | View |
| 9 | debian | policykit-1 (forky) | View |
| 10 | debian | policykit-1 (trixie) | View |
| 11 | debian | policykit-1 (bookworm) | View |
| 12 | Ubuntu | policykit-1 (trusty) | View |
| 13 | Ubuntu | policykit-1 (xenial) | View |
| 14 | Ubuntu | policykit-1 (bionic) | View |
| 15 | Ubuntu | policykit-1 (focal) | View |
| 16 | Ubuntu | policykit-1 (upstream) | View |
| 17 | Ubuntu | policykit-1 (jammy) | View |
| 18 | Ubuntu | policykit-1 (noble) | View |
| 19 | Ubuntu | policykit-1 (resolute) | View |
| 20 | Ubuntu | policykit-1 (stonking) | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 3.5 | CVSS V3_1 | LOW | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L | CVE CNA |
| 3.5 | CVSS V31 | LOW | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
4 düzeltme kanıtı bulundu; en az 7 ürün veya sürüm hâlâ etkileniyor ya da inceleniyor.
0.105-33ubuntu0.2Ubuntu jammy: 0.105-33ubuntu0.2
124-2ubuntu1.24.04.4Ubuntu noble: 124-2ubuntu1.24.04.4
127-2ubuntu1.1Ubuntu resolute: 127-2ubuntu1.1
Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-85498 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-85498 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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