7.5

CVE-2026-68131: linux

CVSS: 7.5v3.1HighReceived
AliasesUBUNTU-CVE-2026-68131DEBIAN-CVE-2026-68131
Published 10-08-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-68131 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 43.2% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.52%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 17 · Related 15
MGASA-2026-0336MGASA-2026-0337USN-8875-1USN-8875-2USN-8876-1USN-8877-1

Timeline

  1. 10-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: rbd: Reset positive result codes to zero in object map update path In a reply message to an RBD request, a positive result code indicates a data payload, which is not allowed for writes. While rbd_osd_req_callback() already resets a positive result code for writes to zero, rbd_object_map_callback() does not. This allows a corrupted reply to an object map update to trigger the rbd_assert(*result < 0) in __rbd_obj_handle_request(). This happens, because rbd_object_map_callback() calls rbd_obj_handle_request() -> __rbd_obj_handle_request() and passes this positive result code. From __rbd_obj_handle_request(), rbd_obj_advance_write() is called, which leaves the positive result code unchanged and returns true. Therefore, the if(done && *result) branch is executed in __rbd_obj_handle_request() and the assertion triggers. This patch fixes the issue by adjusting the logic in the rbd_object_map_callback() path. A positive result code for an object map update is now reset to zero (similar to rbd_osd_req_callback()), and the message is subsequently handled the same way as if the result code was zero from the beginning. Additionally, a WARN_ON_ONCE() is added for this case.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.52%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

0.00 pp

From 0.52% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.52%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu165 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-147.147 | < 7.0.0-38.38
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1067.70 | < 7.0.0-1014.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.101-1 | < 7.1.6-1
  • linux-6.12< 6.12.101-1~deb12u1
Linux1 product
  • linux≥ 22e8bd51bb0469d1a524130a057f894ff632376a, < cf1167292f606deaddac35ec384eba48f08a68d2 | ≥ 22e8bd51bb0469d1a524130a057f894ff632376a, < da926959bf791441ba06a80571708c3d0d3cc08f | ≥ 22e8bd51bb0469d1a524130a057f894ff632376a, < 6f33d9d539fb94e5a17589c2dfe271ff9bb64904 | ≥ 22e8bd51bb0469d1a524130a057f894ff632376a, < 14995c4250f04b58bf6fc00e0e973a2e1b3cfb9b | ≥ 22e8bd51bb0469d1a524130a057f894ff632376a, < 2419aa74081007dc4d14ff5640659052dfdfd69a | ≥ 22e8bd51bb0469d1a524130a057f894ff632376a, < 34f2a2f32af570dfcc532ad70c080629ee1c32b0 | ≥ 22e8bd51bb0469d1a524130a057f894ff632376a, < b1a61366933224b3ad80975c4d01ac2cc6931ecf | ≥ 22e8bd51bb0469d1a524130a057f894ff632376a, < a6c4250b81bd30beae94e1b7a4b26fa1193ad2e4 | 5.3

3 vendors · 168 products

References

27 links
Show all 27 references