01 Record

CVE-2026-52993

tipc: fix double-free in tipc_buf_append()

CriticalPUBLISHEDCNA: Linux

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

tipc: fix double-free in tipc_buf_append()

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.37% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 29.8% of scored records. A rank, not a probability.
NVD base score: 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-08-03.
Red Hat severity: Important. 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

2026-06-24 16:29Z2 MO AGO

Last updated

2026-08-05 12:32Z1 MO AGO

Reserved

2026-06-09

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

CWE-415Double FreeVariant
CWE-763Release of Invalid Pointer or ReferenceBase

Data version

5.2

Document digest

72ddc1e4d25b0705fe8e15210b86d1541219e1e41face1147ab8fdfa02eae76e

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxd618d09a68e4eed7a435beb2e355250f6f40664a to < a438975a6dcdbd70865978c021650d1485586f0b, d618d09a68e4eed7a435beb2e355250f6f40664a to < 4ee4deadaae7cb2e3d53af0fc889cf92a73413c0, d618d09a68e4eed7a435beb2e355250f6f40664a to < d3556656c6daebf8def751c7e71d11dd0a180d24, d618d09a68e4eed7a435beb2e355250f6f40664a to < 0274f24485fc38032d4093e463dc3ff5c7a667c9, d618d09a68e4eed7a435beb2e355250f6f40664a to < 4d104882bc815d4ec666ace9155f5f52715879a6, d618d09a68e4eed7a435beb2e355250f6f40664a to < 1d5e589055880fae229e229e1929e087dbe08cf3, d618d09a68e4eed7a435beb2e355250f6f40664a to < 29940fff14110ca48c5ccc168d121665b51bb778, d618d09a68e4eed7a435beb2e355250f6f40664a to < d293ca716e7d5dffdaecaf6b9b2f857a33dc3d3a, 4.15—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/a438975a6dcdbd70865978c021650d1485586f0b
git.kernel.orghttps://git.kernel.org/stable/c/4ee4deadaae7cb2e3d53af0fc889cf92a73413c0
git.kernel.orghttps://git.kernel.org/stable/c/d3556656c6daebf8def751c7e71d11dd0a180d24
git.kernel.orghttps://git.kernel.org/stable/c/0274f24485fc38032d4093e463dc3ff5c7a667c9
git.kernel.orghttps://git.kernel.org/stable/c/4d104882bc815d4ec666ace9155f5f52715879a6
git.kernel.orghttps://git.kernel.org/stable/c/1d5e589055880fae229e229e1929e087dbe08cf3
git.kernel.orghttps://git.kernel.org/stable/c/29940fff14110ca48c5ccc168d121665b51bb778
git.kernel.orghttps://git.kernel.org/stable/c/d293ca716e7d5dffdaecaf6b9b2f857a33dc3d3a
access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-52993vdb-entryx_refsource_REDHAT
bugzilla.redhat.comRHBZ#2492437https://bugzilla.redhat.com/show_bug.cgi?id=2492437issue-trackingx_refsource_REDHAT
security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52993.jsonx_sadp-csaf-vex
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:47017vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:49212vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:45115vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:45116vendor-advisoryx_refsource_REDHAT

01 Record index

CVE-2026-52993

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-52993

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References