01 Record

CVE-2026-53250

xsk: cache csum_start/csum_offset to fix TOCTOU in xsk_skb_metadata()

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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02 Description

xsk: cache csum_start/csum_offset to fix TOCTOU in xsk_skb_metadata()

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

0.10% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 1.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:L/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

2026-06-25 08:39Z4 MO AGO

Last updated

2026-10-19 19:57Z9 DAYS AGO

Reserved

2026-06-09

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

CWE-367Time-of-check Time-of-use (TOCTOU) Race ConditionBase
CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

ebe5ebf827225b360b69939b23894880364e52aa9b25a07f5f3c425243ace7ba

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux48eb03dd26304c24f03bdbb9382e89c8564e71df to < eb778aed8a9b2381668fcb1247ae4fa011224768, 48eb03dd26304c24f03bdbb9382e89c8564e71df to < 0dfe05b938435892875e07771170051346412df9, 48eb03dd26304c24f03bdbb9382e89c8564e71df to < bfdfd2706d5fb2cd496a1506e680daf979309c8b, 48eb03dd26304c24f03bdbb9382e89c8564e71df to < 22ba97ea9cc1f63a0d0244fae38057ed452b6ac7, 6.8—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/eb778aed8a9b2381668fcb1247ae4fa011224768
git.kernel.orghttps://git.kernel.org/stable/c/0dfe05b938435892875e07771170051346412df9
git.kernel.orghttps://git.kernel.org/stable/c/bfdfd2706d5fb2cd496a1506e680daf979309c8b
git.kernel.orghttps://git.kernel.org/stable/c/22ba97ea9cc1f63a0d0244fae38057ed452b6ac7

07 Fixed in

Debian 12

linux-6.12
Fixed in 6.12.111-1~deb12u1

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

Debian 13

linux
Fixed in 6.12.111-1

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

Debian 14

linux
Fixed in 7.0.13-1

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