CVE-2026-91142
Cockpit: cockpit: unauthorized modification of login records via integer overflow
A flaw was found in Cockpit. An authenticated local user with a large user identifier (UID) can cause unauthorized modification and disclosure of login records. On 32-bit systems, an integer overflow during session accounting allows the user's login process to read or overwrite the legacy log entries of other accounts.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Cockpit: cockpit: unauthorized modification of login records via integer overflow
A flaw was found in Cockpit. An authenticated local user with a large user identifier (UID) can cause unauthorized modification and disclosure of login records. On 32-bit systems, an integer overflow during session accounting allows the user's login process to read or overwrite the legacy log entries of other accounts.
- Record
CVE-2026-91142- CVSS 3.1
- 3.6 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-190
- Updated
- 2026-11-06
EUVDEUVD-2026-83176
A flaw was found in Cockpit. An authenticated local user with a large user identifier (UID) can cause unauthorized modification and disclosure of login records. On 32-bit systems, an integer overflow during session accounting allows the user's login process to read or overwrite the legacy log entries of other accounts.
- Record
EUVD-2026-83176- CVSS 3.1
- 3.6 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-06
GitHub AdvisoriesGHSA-2f43-vjp7-v3qj
A flaw was found in Cockpit. An integer overflow vulnerability in the `do_lastlog()` function,...
A flaw was found in Cockpit. An integer overflow vulnerability in the do_lastlog() function, specifically in the offset calculation for lastlog entries on ILP32 (Integer, Long, Pointer 32-bit) builds, can be exploited. A low-privileged authenticated user with a specially provisioned large User ID (UID) can cause the computed offset to wrap around. This allows the user to perform unauthorized reads and writes to other users' lastlog records, potentially disclosing or altering sensitive login accounting information.
- Record
GHSA-2f43-vjp7-v3qj- CVSS 3.1
- 3.6 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-190, CWE-787
- Updated
- 2026-11-02
NVD
A flaw was found in Cockpit. An authenticated local user with a large user identifier (UID) can cause unauthorized modification and disclosure of login records. On 32-bit systems, an integer overflow during session accounting allows the user's login process to read or overwrite the legacy log entries of other accounts.
- Record
CVE-2026-91142- CVSS 3.1
- 3.6 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-190
- Updated
- 2026-11-06
OSVDEBIAN-CVE-2026-91142
A flaw was found in Cockpit. An authenticated local user with a large user identifier (UID) can cause unauthorized modification and disclosure of login records. On 32-bit systems, an integer overflow during session accounting allows the user's login process to read or overwrite the legacy log entries of other accounts.
- Record
DEBIAN-CVE-2026-91142- CVSS 3.1
- 3.6 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-07
OSVUBUNTU-CVE-2026-91142
A flaw was found in Cockpit. An authenticated local user with a large user identifier (UID) can cause unauthorized modification and disclosure of login records. On 32-bit systems, an integer overflow during session accounting allows the user's login process to read or overwrite the legacy log entries of other accounts.
- Record
UBUNTU-CVE-2026-91142- CVSS 3.1
- 3.6 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
cockpitDebian:12 |
All versions, plus listed versions 287-1287.1-0+deb12u1287.1-0+deb12u2287.1-0+deb12u3288.1-1 Show 45 moreShow less289-1290-1291-1292-1293-1294-1294.1-1295-1296-1297-1297-1~bpo12+1298-1299-1299-1~bpo12+1300-1300.1-1300.1-1~bpo12+1301-1301-1~bpo12+1302-1303-1303-1~bpo12+1304-1305-1305-1~bpo12+1306-1306-1~bpo12+1307-1307-1~bpo12+1308-1308-1~bpo12+1309-1309-1~bpo12+1310-1310.1-1310.1-1~bpo12+1311-1311-1~bpo12+1312-1313-1314-1316-1317-1317-2317-3 |
None known |
cockpitDebian:13 |
All versions, plus listed versions 337-1337-1+deb13u1337-1+deb13u2338-1339-1 Show 40 moreShow less340-1341.1-1342-1343-1345-1345-1~bpo13+1346-1346-1~bpo13+1348-1348-1~bpo13+1350-1350-1~bpo13+1352-1352-1~bpo13+1353.1-1353.1-1~bpo13+1354-1354-1~bpo13+1355-1355-1~bpo13+1356-1356-1~bpo13+1358-1358-1~bpo13+1360-1360-1~bpo13+1362-1362-1~bpo13+1365-1365-1~bpo13+1366-1366-1~bpo13+1367-1367-1~bpo13+1368-1368-1~bpo13+1370-1370-1~bpo13+1371-1371-1~bpo13+1 |
None known |
cockpitDebian:14 |
before 368-1, plus listed versions 337-1338-1339-1340-1341.1-1 Show 33 moreShow less342-1343-1345-1345-1~bpo13+1346-1346-1~bpo13+1348-1348-1~bpo13+1350-1350-1~bpo13+1352-1352-1~bpo13+1353.1-1353.1-1~bpo13+1354-1354-1~bpo13+1355-1355-1~bpo13+1356-1356-1~bpo13+1358-1358-1~bpo13+1360-1360-1~bpo13+1362-1362-1~bpo13+1365-1365-1~bpo13+1366-1366-1~bpo13+1367-1367-1~bpo13+1368-1~bpo13+1 |
368-1 |
cockpitUbuntu:18.04:LTS |
All versions, plus listed versions 151-1156-1157-1158-1160-1 Show 4 moreShow less161-1162-1163-1164-1 |
None known |
cockpitUbuntu:20.04:LTS |
All versions, plus listed versions 202.1-1204-1206-1207-1208-1 Show 6 moreShow less210-1211-1212-1213-1214.1-1215-1 |
None known |
cockpitUbuntu:22.04:LTS |
All versions, plus listed versions 252-1256-1257-1258-1259-1 Show 6 moreShow less260-1261-1262-1263-1264-1264-1ubuntu0.22.04.1 |
None known |
cockpitUbuntu:24.04:LTS |
All versions, plus listed versions 300.1-1303-1304-1305-1306-1 Show 7 moreShow less307-1308-1309-1310.1-1311-1312-1build2314-1 |
None known |
cockpitUbuntu:26.10 |
All versions, plus listed versions 360-1362-1365-1367-1 |
None known |
cockpitUbuntu:26.04:LTS |
All versions, plus listed versions 346-1348-1350-1352-1353.1-1 Show 4 moreShow less354-1355-1356-1360-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | EUVD, NVD, OSV | |
| facts | CVE List | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-91142 is a low vulnerability (CVSS 3.6) in Red Hat Enterprise Linux 10, published September 18, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.12%, the 1st percentile. Fixed in cockpit 368-1.
References
Left out here: 84 versions. The JSON record has them.