Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net_sched: ets: fix a race in ets_qdisc_change() Gerrard Tai reported a race condition in ETS, whenever SFQ perturb timer fires at the wrong time. The race is as follows: CPU 0 CPU 1 [1]: lock root [2]: qdisc_tree_flush_backlog() [3]: unlock root | | [5]: lock root | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put() This can be abused to underflow a parent's qlen. Calling qdisc_purge_queue() instead of qdisc_tree_flush_backlog() should fix the race, because all packets will be purged from the qdisc before releasing the lock.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 699d82e9a6db29d509a71f1f2f4316231e6232e6 before eb7b74e9754e1ba2088f914ad1f57a778b11894b; affected ce881ddbdc028fb1988b66e40e45ca0529c23b46 before 0b479d0aa488cb478eb2e1d8868be946ac8afb4f; affected b05972f01e7d30419987a1f221b5593668fd6448 before 347867cb424edae5fec1622712c8dd0a2c42918f; affected b05972f01e7d30419987a1f221b5593668fd6448 before 0383b25488a545be168744336847549d4a2d3d6c; affected b05972f01e7d30419987a1f221b5593668fd6448 before 073f64c03516bcfaf790f8edc772e0cfb8a84ec3; affected b05972f01e7d30419987a1f221b5593668fd6448 before fed94bd51d62d2e0e006aa61480e94e5cd0582b0; affected b05972f01e7d30419987a1f221b5593668fd6448 before d92adacdd8c2960be856e0b82acc5b7c5395fddb; affected fffa19b5e58c34004a0d6f642d9c24b11d213994; affected fb155f6597cd7bc3aeed668c3bb15fc3b7cb257d; affected 5.10.142 before 5.10.239; affected 5.15.66 before 5.15.186; affected 5.4.213 before 5.5; affected 5.19.8 before 5.20 |
| Linux / Linux | affected 6.0; unaffected 0 before 6.0; unaffected 5.10.239 through 5.10.*; unaffected 5.15.186 through 5.15.*; unaffected 6.1.142 through 6.1.*; unaffected 6.6.94 through 6.6.*; unaffected 6.12.34 through 6.12.*; unaffected 6.15.3 through 6.15.*; unaffected 6.16 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/eb7b74e9754e1ba2088f914ad1f57a778b11894b
- https://git.kernel.org/stable/c/0b479d0aa488cb478eb2e1d8868be946ac8afb4f
- https://git.kernel.org/stable/c/347867cb424edae5fec1622712c8dd0a2c42918f
- https://git.kernel.org/stable/c/0383b25488a545be168744336847549d4a2d3d6c
- https://git.kernel.org/stable/c/073f64c03516bcfaf790f8edc772e0cfb8a84ec3
- https://git.kernel.org/stable/c/fed94bd51d62d2e0e006aa61480e94e5cd0582b0
- https://git.kernel.org/stable/c/d92adacdd8c2960be856e0b82acc5b7c5395fddb
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.