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Description

In the Linux kernel, the following vulnerability has been resolved: coresight: ETR: Fix ETR buffer use-after-free issue When ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed and enabled again, currently sysfs_buf will point to the newly allocated memory(buf_new) and free the old memory(buf_old). But the etr_buf that is being used by the ETR remains pointed to buf_old, not updated to buf_new. In this case, it will result in a memory use-after-free issue. Fix this by checking ETR's mode before updating and releasing buf_old, if the mode is CS_MODE_SYSFS, then skip updating and releasing it.

PUBLISHED Reserved 2025-12-16 | Published 2025-12-24 | Updated 2025-12-24 | Assigner Linux

Product status

Default status
unaffected

bd2767ec3df2775bc336f441f9068a989ccb919d (git) before 70acbc9c77686b7a521af6d7a543dcd9c324cf07
affected

bd2767ec3df2775bc336f441f9068a989ccb919d (git) before cda077a19f5c8d6ec61e5b97deca203d95e3a422
affected

bd2767ec3df2775bc336f441f9068a989ccb919d (git) before 35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3
affected

fdd3ceb0001da6768bede9779a0190a42e65c404 (git)
affected

Default status
affected

6.6
affected

Any version before 6.6
unaffected

6.17.13 (semver)
unaffected

6.18.2 (semver)
unaffected

6.19-rc1 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/70acbc9c77686b7a521af6d7a543dcd9c324cf07

git.kernel.org/...c/cda077a19f5c8d6ec61e5b97deca203d95e3a422

git.kernel.org/...c/35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3

cve.org (CVE-2025-68376)

nvd.nist.gov (CVE-2025-68376)

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Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.