Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: lib: cpu_rmap: Avoid use after free on rmap->obj array entries When calling irq_set_affinity_notifier() with NULL at the notify argument, it will cause freeing of the glue pointer in the corresponding array entry but will leave the pointer in the array. A subsequent call to free_irq_cpu_rmap() will try to free this entry again leading to possible use after free. Fix that by setting NULL to the array entry and checking that we have non-zero at the array entry when iterating over the array in free_irq_cpu_rmap(). The current code does not suffer from this since there are no cases where irq_set_affinity_notifier(irq, NULL) (note the NULL passed for the notify arg) is called, followed by a call to free_irq_cpu_rmap() so we don't hit and issue. Subsequent patches in this series excersize this flow, hence the required fix.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c before 981f339d2905b6a92ef59358158b326493aecac5; affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c before d1308bd0b24cb1d78fa2747d5fa3e055cc628a48; affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c before cc2d2b3dbfb0ba57bc027fb7e1121250c50e4000; affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c before f748e15253833b771acbede14ea98f50831ac289; affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c before c6ed54dd90698dc0744d669524cc1c122ded8a16; affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c before c9115f49cf260d24d8b5f2d9a4b63cb31a627bb4; affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c before 67bca5f1d644f4e79b694abd8052a177de81c37f; affected 896f97ea95c1d29c0520ee0766b66b7f64cb967c before 4e0473f1060aa49621d40a113afde24818101d37 |
| Linux / Linux | affected 3.8; unaffected 0 before 3.8; unaffected 4.14.316 through 4.14.*; unaffected 4.19.284 through 4.19.*; unaffected 5.4.244 through 5.4.*; unaffected 5.10.181 through 5.10.*; unaffected 5.15.113 through 5.15.*; unaffected 6.1.30 through 6.1.*; unaffected 6.3.4 through 6.3.*; unaffected 6.4 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/981f339d2905b6a92ef59358158b326493aecac5
- https://git.kernel.org/stable/c/d1308bd0b24cb1d78fa2747d5fa3e055cc628a48
- https://git.kernel.org/stable/c/cc2d2b3dbfb0ba57bc027fb7e1121250c50e4000
- https://git.kernel.org/stable/c/f748e15253833b771acbede14ea98f50831ac289
- https://git.kernel.org/stable/c/c6ed54dd90698dc0744d669524cc1c122ded8a16
- https://git.kernel.org/stable/c/c9115f49cf260d24d8b5f2d9a4b63cb31a627bb4
- https://git.kernel.org/stable/c/67bca5f1d644f4e79b694abd8052a177de81c37f
- https://git.kernel.org/stable/c/4e0473f1060aa49621d40a113afde24818101d37
ADP enrichment
No English description supplied.
No references supplied.