CVE-2021-47355

atm: nicstar: Fix possible use-after-free in nicstar_cleanup()

State: Published
Severity: Not scored
Published: May 21, 2024
Updated: May 11, 2026
Reserved: May 21, 2024

Description

In the Linux kernel, the following vulnerability has been resolved:

atm: nicstar: Fix possible use-after-free in nicstar_cleanup()

This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free.

Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 99779c9d9ffc7775da6f7fd8a7c93ac61657bed5Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 4e2a0848ea2cab0716d46f85a8ccd5fa9a493e51Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before c471569632654e57c83512e0fc1ba0dbb4544ad6Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a7a7b2848312cc4c3a42b6e42a8ab2e441857abaAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before bdf5334250c69fabf555b7322c75249ea7d5f148Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a7f7c42e31157d1f0871d6a8e1a0b73a6b4ea785Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2f958b6f6ba0854b39be748d21dfe71e0fe6580fAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 5b991df8881088448cb223e769e37cab8dd40706Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 34e7434ba4e97f4b85c1423a59b2922ba7dff2eaAffected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 4.4.276 through 4.4.Not affected 4.9.276 through 4.9.Not affected 4.14.240 through 4.14.Not affected 4.19.198 through 4.19.Not affected 5.4.133 through 5.4.Not affected 5.10.51 through 5.10.Not affected 5.12.18 through 5.12.Not affected 5.13.3 through 5.13.Not affected 5.14 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 99779c9d9ffc7775da6f7fd8a7c93ac61657bed5Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 4e2a0848ea2cab0716d46f85a8ccd5fa9a493e51Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before c471569632654e57c83512e0fc1ba0dbb4544ad6Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a7a7b2848312cc4c3a42b6e42a8ab2e441857abaAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before bdf5334250c69fabf555b7322c75249ea7d5f148Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a7f7c42e31157d1f0871d6a8e1a0b73a6b4ea785Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2f958b6f6ba0854b39be748d21dfe71e0fe6580fAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 5b991df8881088448cb223e769e37cab8dd40706Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 34e7434ba4e97f4b85c1423a59b2922ba7dff2eaAffected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
4.4.276 through 4.4.*Not affected
4.9.276 through 4.9.*Not affected
4.14.240 through 4.14.*Not affected
4.19.198 through 4.19.*Not affected
5.4.133 through 5.4.*Not affected
5.10.51 through 5.10.*Not affected
5.12.18 through 5.12.*Not affected
5.13.3 through 5.13.*Not affected
5.14 and laterNot affected

References

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