01 Record

CVE-2026-63796

ocfs2: reject oversized group bitmap descriptors

HighPUBLISHEDCNA: Linux

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

ocfs2: reject oversized group bitmap descriptors

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.58% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 47.7% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-19.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-07-19 12:02Z3 MO AGO

Last updated

2026-10-19 20:07Z10 DAYS AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-125Out-of-bounds ReadBase
CWE-825Expired Pointer DereferenceBase

Data version

5.2

Document digest

26c268f5cd2a3f83770fd190f32c6b76971bd7f0302e9721703c9d19e2ef659d

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxccd979bdbce9fba8412beb3f1de68a9d0171b12c to < 336340a0f8a141df8a4eb21a5a86f8ffb87769f6, ccd979bdbce9fba8412beb3f1de68a9d0171b12c to < 296c6a42b1174395935ca4cfe8f393e37b698d54, ccd979bdbce9fba8412beb3f1de68a9d0171b12c to < d2cd59fa848f9f13796ef214d3b1b5ca9a3fe21e, ccd979bdbce9fba8412beb3f1de68a9d0171b12c to < c5a125eadba05ba421c4b55e68da22b4a40d32b4, ccd979bdbce9fba8412beb3f1de68a9d0171b12c to < 8f9903b0cdbb3155a8899410330b4b4d583a7a5c, ccd979bdbce9fba8412beb3f1de68a9d0171b12c to < 4cd57ebee395041099fcdfcabb00749ce38d8b27, ccd979bdbce9fba8412beb3f1de68a9d0171b12c to < 99c21e7263248c3f084756bfae08163cc5d6c62f, ccd979bdbce9fba8412beb3f1de68a9d0171b12c to < 9bd541e09dffff27e5bec0f9f45b0228173a5375, 2.6.16—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/336340a0f8a141df8a4eb21a5a86f8ffb87769f6
git.kernel.orghttps://git.kernel.org/stable/c/296c6a42b1174395935ca4cfe8f393e37b698d54
git.kernel.orghttps://git.kernel.org/stable/c/d2cd59fa848f9f13796ef214d3b1b5ca9a3fe21e
git.kernel.orghttps://git.kernel.org/stable/c/c5a125eadba05ba421c4b55e68da22b4a40d32b4
git.kernel.orghttps://git.kernel.org/stable/c/8f9903b0cdbb3155a8899410330b4b4d583a7a5c
git.kernel.orghttps://git.kernel.org/stable/c/4cd57ebee395041099fcdfcabb00749ce38d8b27
git.kernel.orghttps://git.kernel.org/stable/c/99c21e7263248c3f084756bfae08163cc5d6c62f
git.kernel.orghttps://git.kernel.org/stable/c/9bd541e09dffff27e5bec0f9f45b0228173a5375

07 Fixed in

Debian 12

linux
Fixed in 6.1.177-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.95-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 7.1.3-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.