Vulnerability-Lookup

FKIE_CVE-2025-39873

Vulnerability from fkie_nvd - Published: 2025-09-23 06:15 - Updated: 2026-01-20 20:33

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB can_put_echo_skb() takes ownership of the SKB and it may be freed during or after the call. However, xilinx_can xcan_write_frame() keeps using SKB after the call. Fix that by only calling can_put_echo_skb() after the code is done touching the SKB. The tx_lock is held for the entire xcan_write_frame() execution and also on the can_get_echo_skb() side so the order of operations does not matter. An earlier fix commit 3d3c817c3a40 ("can: xilinx_can: Fix usage of skb memory") did not move the can_put_echo_skb() call far enough. [mkl: add "commit" in front of sha1 in patch description] [mkl: fix indention]

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1139321161a3ba5e45e61e0738b37f42f20bc57a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/668cc1e3bb21101d074e430de1b7ba8fd10189e7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/725b33deebd6e4c96fe7893f384510a54258f28f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/94b050726288a56a6b8ff55aa641f2fedbd3b44c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e202ffd9e54538ef67ec301ebd6d9da4823466c9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ef79f00be72bd81d2e1e6f060d83cf7e425deee4	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	Third Party Advisory, Mailing List

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.17
linux	linux_kernel	6.17
linux	linux_kernel	6.17
linux	linux_kernel	6.17
linux	linux_kernel	6.17
debian	debian_linux	11.0

JSON

To clipboard

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CVE-2025-39873 (GCVE-0-2025-39873)

Vulnerability from cvelistv5 – Published: 2025-09-23 06:00 – Updated: 2025-11-03 17:44

Title

can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/e202ffd9e54538ef6…
	https://git.kernel.org/stable/c/1139321161a3ba5e4…
	https://git.kernel.org/stable/c/94b050726288a56a6…
	https://git.kernel.org/stable/c/725b33deebd6e4c96…
	https://git.kernel.org/stable/c/668cc1e3bb21101d0…
	https://git.kernel.org/stable/c/ef79f00be72bd81d2…

Impacted products

Vendor

Product

Version

Linux

Affected: 1598efe57b3e768056e4ca56cb9cf33111e68d1c , < e202ffd9e54538ef67ec301ebd6d9da4823466c9 (git)
Affected: 1598efe57b3e768056e4ca56cb9cf33111e68d1c , < 1139321161a3ba5e45e61e0738b37f42f20bc57a (git)
Affected: 1598efe57b3e768056e4ca56cb9cf33111e68d1c , < 94b050726288a56a6b8ff55aa641f2fedbd3b44c (git)
Affected: 1598efe57b3e768056e4ca56cb9cf33111e68d1c , < 725b33deebd6e4c96fe7893f384510a54258f28f (git)
Affected: 1598efe57b3e768056e4ca56cb9cf33111e68d1c , < 668cc1e3bb21101d074e430de1b7ba8fd10189e7 (git)
Affected: 1598efe57b3e768056e4ca56cb9cf33111e68d1c , < ef79f00be72bd81d2e1e6f060d83cf7e425deee4 (git)

Linux

Affected: 4.19
Unaffected: 0 , < 4.19 (semver)
Unaffected: 5.15.194 , ≤ 5.15.* (semver)
Unaffected: 6.1.153 , ≤ 6.1.* (semver)
Unaffected: 6.6.107 , ≤ 6.6.* (semver)
Unaffected: 6.12.48 , ≤ 6.12.* (semver)
Unaffected: 6.16.8 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2025-39873

CVE-2025-39873 (GCVE-0-2025-39873)

Tags

Sightings

Nomenclature