01 Record

CVE-2021-47656

jffs2: fix use-after-free in jffs2_clear_xattr_subsystem

HighPUBLISHEDCNA: Linux

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

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02 Description

jffs2: fix use-after-free in jffs2_clear_xattr_subsystem

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

0.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 17.3% 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:N/UI:R/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-08-04.

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

2025-02-26 01:54Z1 YR AGO

Last updated

2026-08-05 08:48Z2 MO AGO

Reserved

2025-02-26

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

CWE-416Use After FreeVariant

Data version

5.2

Document digest

945616ccd0292dbb07f85b2c4971072a4694c3c3aa66aa5630d86727a299cba6

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxaa98d7cf59b5b0764d3502662053489585faf2fe to < 9150cb625b46f68d524f4cfd491f1aafc23e10a9, aa98d7cf59b5b0764d3502662053489585faf2fe to < 3bd2454162ec6bbb5503233c804fce6e4b6dcec5, aa98d7cf59b5b0764d3502662053489585faf2fe to < c3b07c875fa8f906f932976460fd14798596f101, aa98d7cf59b5b0764d3502662053489585faf2fe to < 30bf7244acf32f19cb722c39f7bc1c2a9f300422, aa98d7cf59b5b0764d3502662053489585faf2fe to < 7bb7428dd73991bf4b3a7a61b493ca50046c2b13, aa98d7cf59b5b0764d3502662053489585faf2fe to < 7a75740206af5f17e9f3efa384211cba70213da1, aa98d7cf59b5b0764d3502662053489585faf2fe to < 22327bd7988f21de3a53c1373f3b81542bfe1f44, aa98d7cf59b5b0764d3502662053489585faf2fe to < 8c0f024f29e055840a5a89fe23b96ae3f921afed, aa98d7cf59b5b0764d3502662053489585faf2fe to < 4c7c44ee1650677fbe89d86edbad9497b7679b5c, 2.6.18—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/9150cb625b46f68d524f4cfd491f1aafc23e10a9
git.kernel.orghttps://git.kernel.org/stable/c/3bd2454162ec6bbb5503233c804fce6e4b6dcec5
git.kernel.orghttps://git.kernel.org/stable/c/c3b07c875fa8f906f932976460fd14798596f101
git.kernel.orghttps://git.kernel.org/stable/c/30bf7244acf32f19cb722c39f7bc1c2a9f300422
git.kernel.orghttps://git.kernel.org/stable/c/7bb7428dd73991bf4b3a7a61b493ca50046c2b13
git.kernel.orghttps://git.kernel.org/stable/c/7a75740206af5f17e9f3efa384211cba70213da1
git.kernel.orghttps://git.kernel.org/stable/c/22327bd7988f21de3a53c1373f3b81542bfe1f44
git.kernel.orghttps://git.kernel.org/stable/c/8c0f024f29e055840a5a89fe23b96ae3f921afed
git.kernel.orghttps://git.kernel.org/stable/c/4c7c44ee1650677fbe89d86edbad9497b7679b5c

07 Fixed in

Debian 12

linux
Fixed in 5.17.3-1

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

Debian 13

linux
Fixed in 5.17.3-1

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

Debian 14

linux
Fixed in 5.17.3-1

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